PHYMED INC
10KSB, 2000-03-07
MEDICAL LABORATORIES
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                    U. S. Securities and Exchange Commission

                             Washington, D.C. 20549

                                   Form 10-KSB

        (Mark One)

          [x]  ANNUAL  REPORT  PURSUANT  TO  SECTION  13 OR  15(d)  OF  THE
               SECURITIES EXCHANGE ACT OF 1934

               For the fiscal year ended December 31, 1998

          [ ]  TRANSITION  REPORT UNDER SECTION 13 OR 15(d) OF THE  SECURITIES
               EXCHANGE ACT OF 1934

               For the transition period from ___________ to ____________


                         Commission file number 0-10701.

                                  PHYMED, INC.
                 (Name of small business issuer in its charter)

                              Tatonka Energy, Inc.
                   (former name), if changed since last report

       Oklahoma, USA                                       73-1457920
  (State or other jurisdiction                         (I.R.S. Employer
   of incorporation or organization)                    Identification No.)

                        9603 White Rock Trail, Suite 100
                        Dallas, Texas                        75238
                  (Address of principal executive offices) (Zip Code)

                    Issuer's telephone number: (214) 340-9912

Securities registered under Section 12(b) of the Exchange Act:

       Title of each class                  Name of each exchange on which
           registered                           None

Securities registered under Section 12(g) of the Exchange Act:

                   Common Stock, Par Value of $.001 per Share

                                (Title of class)

         Check whether the issuer (1) filed all reports  required to be filed by
Section 13 or 15(d) of the  Exchange  Act during the past 12 months (or for such
shorter period that the  registrant was required to file such reports),  and (2)
has been subject to such filing requirements for the past 90 days.   Yes   No X

         Check if there is no  disclosure  of  delinquent  filers in response to
Item 405 of  Regulation  S-B contained in this form,  and no disclosure  will be
contained,  to the  best of  registrant's  knowledge,  in  definitive  proxy  or
information statements incorporated by reference in Part III of this Form 10-KSB
or any amendment to this Form 10-KSB. [ ]

         State issuer's revenues for its most recent fiscal year: $ 3,330,411.
                                                                  -----------

         State the aggregate  market value of the voting and  non-voting  common
equity held by  non-affiliates  computed by  reference to the price at which the
common equity was sold, or the average bid and asked price of such common equity
as of a specified date within the past 60 days: $4,391,8450 based on the average
of the bid and asked price on February 22, 2000.

         State the number of shares  outstanding of each of the issuer's classes
of common equity, as of the latest practicable date:  8,783,697 shares of Common
Stock, $.01 par value, as of December 31, 1999.

         Transitional Small Business Disclosure Format (check one): Yes   No  X
                                                                             ---

<PAGE>


                                TABLE OF CONTENTS

                                     PART I

Item 1.  Description of Business                                             4

Item 2.  Description of Property                                             6

Item 3.  Legal Proceedings                                                   7

Item 4.  Submission of Matters to a Vote of Security Holders                 7

                                     PART II

Item 5.  Market for Common Equity and Related Stockholder Matters            7

Item 6.  Management's Discussion and Analysis or Plan of Operation           10

Item 7.  Financial Statements                                                13


                                    PART III

Item 9.  Directors, Executive Officers, Promoters and Control Persons;       14
                  Compliance with Section 16(a) of the Exchange Act

Item 10. Executive Compensation                                              16

Item 11. Security Ownership of Certain Beneficial Owners and Management      20

Item 12. Certain Relationships and Related Transactions                      22

Item 13. Exhibits and Reports on Form 8-K

Signature Page

Index to Financial Statements


<PAGE>


                                     PART I

Item 1. Description of Business

Business Development

         The  Registrant  was  organized  under  the laws of  British  Columbia,
Canada,   on  March  12,   1980,   under  the  name  of  Sooner   Energy   Corp.
("Sooner-British  Columbia").  On  June 1,  1994,  at an  extraordinary  general
meeting of members of Sooner-British  Columbia,  a special resolution was passed
for the  continuance  of the  Registrant as a Wyoming  corporation in the United
States. On such date,  Sooner-British Columbia was then "continued" as a Wyoming
corporation  with the same name  ("Sooner-Wyoming")  and was immediately  merged
into a wholly owned subsidiary of Sooner-Wyoming, which had been incorporated in
Oklahoma under the name of Tatonka  Energy,  Inc.  ("Tatonka").  Tatonka was the
surviving  corporation  in the  merger  and is  referred  to in this  report  as
"Tatonka" or the "Registrant."

         On April 3, 1998, the Registrant acquired 80% of the outstanding common
shares of Phy.Med.  Inc., a Texas corporation ("PHYMED - Dallas"),  in a reverse
triangular  merger.  In  connection  with the merger the  Registrant  issued and
George C. Barker,  individually,  and as Trustee of the Phy.Med.,  Inc. Employee
Stock  Ownership  Plan  (the  "ESOP"),  acquired  from  the  Registrant,  in the
aggregate,  immediate  ownership  of and the right to  receive an  aggregate  of
68,915,409  authorized but unissued shares of Common Stock,  $.001 par value, of
the Registrant, as then constituted, which, if all such shares were outstanding,
would constitute 87.9% of the Registrant's then outstanding 78,430,965 shares of
Common Stock.

         The  Registrant  completed a 1-for-10  reverse  stock split that became
effective  shortly after the annual  meeting of  shareholders  held February 19,
1999. Upon the  effectiveness of such reverse split, Mr. Barker and the ESOP own
6,941,540 shares of the 7,843,097 shares, $.01 par value, outstanding (7,933,190
shares  on a  fully  diluted  basis).  The  Registrant  will  continue  to  have
50,000,000 shares of Common Stock authorized.  At the date of the merger Tatonka
had only  nominal  assets.  Therefore,  the merger has been  accounted  for as a
recapitalization of PHYMED - Dallas.  Accordingly,  the financial  statements of
the Registrant included herein are those of PHYMED - Dallas.

         The Registrant's registered office for service in Oklahoma is 1601 N.W.
Expressway,  Suite 1910, Oklahoma City, Oklahoma 73118. The executive offices of
the Registrant are located in Dallas, Texas at 9603 White Rock Trail, Suite 100,
Dallas,  Texas 75238.  The main business  telephone  number of the Registrant at
such address is (214) 340-9912.


<PAGE>



Business of the Registrant

         The Registrant  formerly  engaged in the exploration and development of
oil and gas  products.  As of  December  31, 1996 the  Registrant  was no longer
actively engaged in the oil and gas industry.

         In  August  1996,   Richard A. Green, Sr.  acquired   control   of  the
Registrant  through Verde,  Inc., a corporation he controlled.  On September 11,
1996 the Registrant  invested  unsuccessfully  in a new restaurant  concept.  On
November 6, 1996, the Registrant invested unsuccessfully in the establishment of
a wholly-owned subsidiary for the purpose of developing new lines of business in
the  commercial  construction  industry.  On or about July 21, 1997,  Richard A.
Green,  Sr., ceased to control the Registrant and sold  controlling  interest in
the Registrant to Richard Bowes and Joe R. Love.

         In April 1998, the Registrant  acquired 80% of the  outstanding  common
shares of PHYMED DIAGNOSTIC  IMAGING CENTER - Dallas,  Inc.  (formerly  Phy.Med.
Inc.), a Texas corporation  ("PHYMED - Dallas") in a reverse  triangular merger.
PHYMED - Dallas is an eight-year-old  privately held company in the operation of
medical  diagnostic  imaging  centers,  which  provide a full  scope of  medical
diagnostic imaging services including magnetic resonance imaging (MRI), computer
tomography  (CT) scans,  x-rays and other  radiological  services to patients of
referring  physicians.  At the time of the  merger  PHYMED -  Dallas  owned  and
operated a  diagnostic  imaging  center  (White  Rock) in Dallas,  Texas,  which
provides diagnostic services to referring physicians in the Dallas area.

         Additionally,  PHYMED  -  Dallas  at the  time of the  merger  provided
management  services  to  Medical  Imaging  of  Plano,  Inc.  ("MIPI"),  a newly
constructed diagnostic imaging center in Plano, Texas (a suburb of Dallas) under
a licensing and management  agreement.  The Plano center  (located 10 miles from
the White Rock  center)  offers  identical  services to the White Rock center to
referring  physicians in the Plano area. This licensing and management agreement
was terminated by mutual consent as of September 30, 1999 in anticipation of the
sale of the imaging center to a third party.

         PHYMED  - Dallas  at that  time had  also  established  a wholly  owned
capitated  services  subsidiary,  PhyMed  Contracted  Services,  Inc. ("PHYMED -
Contracted  Services")  to  provide  radiological  services  under an  exclusive
risk-based system of reimbursement to independent  physician  associations (IPA)
and health maintenance organizations. In August 1998 Contracted Services entered
into such an arrangement with an IPA. In addition to capitated services,  PHYMED
- - Dallas  purchased  the x-ray  equipment  located in two of the IPA's  clinics,
which are operated for capitated and non-capitated patients of the clinics.

         On December 12, 1997 PhyMed organized PhyMed Diagnostic Center-McAllen,
L.L.C., a Texas limited liability corporation, for the purpose of establishing a
diagnostic  imaging center in McAllen,  Texas.  In 1998, 43% of the ownership of
the L.L.C.  was  acquired by outside  parties  with the  remaining  57% owned by
PHYMED -  Dallas.  In March  1999,  the  center  began  operation  in  temporary
facilities  with a portable MRI. The Registrant  was unable to obtain  financing
for  the  permanent  structure  and add  additional  services  required  for the
successful operation of the new center. Based upon the aforementioned management
decided to close the facility and the McAllen  imaging center ceased  operations
December 31, 1999 and the L.L.C. will be dissolved in 2000.


<PAGE>

         In September  1999 the  Registrant  formed  PHYMED  Diagnostic  Imaging
Center-Hillcrest,  Inc.,  (PHYMED-Hillcrest)  a wholly owned  subsidiary for the
purpose of leasing an existing diagnostic imaging center located approximately 6
miles from the White Rock center.  The Center provides MRI, CAT scan,  radiology
and ultrasound services to referring physicians.

         Also in September 1999 the Registrant formed PHYMED Diagnostic  Imaging
Center-Duncanville, Inc., (PHYMED-Duncanville) a wholly owned subsidiary for the
purpose of acquiring an existing  diagnostic center located in the Dallas suburb
of Duncanville  located  approximately 20 miles from the White Rock Center.  The
imaging  center  ceased  operations  n December  1999.  The seller was unable to
provide an acceptable real estate lease acceptable and the Registrant terminated
the purchase agreement.

Employees

         As of December 31, 1998, the Registrant had 35 full-time employees.

Item 2.  Description of Property

         At  December  31,  1998,   the  Registrant   occupied   leased  offices
(approximately  13,000 square feet) at 9603 White Rock Trail,  in Dallas,  Texas
with an annual lease obligation of $158,000.  The Registrant's corporate offices
and its wholly owned  subsidiary,  PHYMED  Diagnostic  Imaging  Center - Dallas,
Inc.,  occupies  the same  leased  space in which it  provides  a full  range of
diagnostic imaging services.

         Additionally,   the   Registrant's  wholly  owned  subsidiary,   PHYMED
Contracted Services, Inc. leased office space at the medical clinics of INOVA in
Richardson and Mesquite,  Texas with an annual lease obligation of $6,600.  Each
is equipped with x-ray and developing equipment.

         In September 1999  PHYMED-Hillcrest  entered into a five year lease for
approximately  8,000  square feet of space with an annual  lease  obligation  of
$165,000 that had previously  been operated as imaging center at 12840 Hillcrest
Road, in Dallas, Texas.

Item 3.  Legal Proceedings

         At December 31, 1998,  PHYMED  Diagnostic Imaging Center - Dallas, Inc.
(a subsidiary  of the  Registrant)  was a party to the  following  pending legal
proceeding.

          On December 7, 1998 Siemens  Credit  Corporation  through its attorney
demanded full payment on a delinquent  equipment lease and a related  promissory
note on which the majority  shareholders  of the Registrant are  guarantors.  On
January  20,  1999 both the lease and  promissory  notes  were  accelerated  and
Siemens  filed  suit in the  Federal  Court in  Northern  District  of Texas for
collection of both the lease and promissory note.

          On July 30, 1999  Siemens gave notice to remove the MRI related to the
lease,  which was  accomplished in August 1999. In December 1999 a joint venture
between the Registrant and an equipment  leasing company  purchased the MRI from
Siemens Credit Corporation for $600,000.

         Management is  continuing  to negotiate a settlement  with Siemens that
would be satisfactory to both parties.  The consolidated  balance sheet reflects
as a  current  liability  the  amount  due from the  subsidiary  under the lease
agreement.

Item 4.  Submission of Matters to a Vote of Security Holders

         Not applicable.


<PAGE>

                                     PART II

Item 5. Market for Common Equity and Related Stockholder Matters

         The  Registrant's  Common  Stock is  quoted  on the  NASD's  Electronic
Bulletin  Board traded in the  over-the-counter  market under the symbol  "TTKA"
prior to March  1999 when the symbol  was  changed  to  "PYMD".  Trading is only
sporadic and there is no established  trading market.  The tables below list the
high and low bid prices in U.S.  dollars for each quarter of the last two fiscal
years, as provided by NASDAQ.

                                 Bid Quotations*
                              --------------------------
                                Low               High
1998 (U.S. Dollars):
   First Quarter                .20               2.20
   Second Quarter               .40               2.1875
   Third Quarter                .3125             1.30
   Fourth Quarter               .30                .625
1997 (U.S.Dollars):
   First Quarter                .10                .10
   Second Quarter               .10                .10
   Third Quarter                .1875              .10
   Fourth Quarter               .140625            .10

- --------------------------------------------------------------------------------
         *These quotations reflect inter-dealer prices,  without retail mark-up,
         mark-down,   or   commission   and  thus  may  not   represent   actual
         transactions.

         The  Registrant  has not paid any  dividends  on its  Common  Stock and
anticipates  that future  earnings,  if any, will be retained to finance  future
growth.  In addition,  the 135,139 shares of Series "A" Preferred  Stock have an
annual noncumulative dividend preference of $6,757. Accordingly,  the Registrant
does not  anticipate  paying any  dividends on Common Stock for the  foreseeable
future.

         Within the past fiscal  year,  the  Registrant  has sold the  following
securities without registering under the Securities Act:

                    (a) On April 3, 1998, the Registrant  issued by operation of
               law in a reverse  triangular  statutory  merger certain shares of
               Common Stock in a business  combination.  The Registrant acquired
               ownership of 80% of Phy.Med.  Inc. in the merger.  In  connection
               with the merger, George C. Barker, individually, and the Phy.Med.
               Inc.  Employee Stock  Ownership Plan (the "ESOP"),  acquired from
               the Registrant, in the aggregate,  immediate ownership of and the
               right to  receive an  aggregate  of  6,815,409  (shares of Common
               Stock,  $.01 par value, of the Registrant  which would constitute
               87.9% of the 7,843967 shares of Common Stock the Registrant would
               then  have  outstanding.  See  "Item 11.  Security  Ownership  of
               Certain Beneficial Owners and Management."

                    The issuance of these shares is exempt under Section 4(2) of
               the  Securities  Act. The Registrant is issuing these shares to a
               sophisticated  investor.  In addition,  Mr.  Barker has access to
               information concerning the Registrant and the ability to fend for
               himself.  He and the ESOP, of which he is the sole  trustee,  are
               taking the shares for investment.

                    (b)  Effective  December  31,  1997,  the Board of Directors
               authorized  the Registrant to issue to Joe P. Foor 100,000 shares
               of Common Stock as a finder's fee for his services in introducing
               the  Registrant   and  Phy.Med.,   Inc.,  and  assisting  in  the
               consummation of an acquisition of PHYMED - Dallas, such shares to
               be issuable only in the event of the  consummation  of a business
               combination transaction whereby the Registrant acquires Phy.Med.,
               Inc. On such date, the Common Stock was trading at about $.60 per
               share.  The  100,000  shares  were  valued  at $.20 per share (or
               $20,000),  on  the  basis  of the  market  value  of  the  stock,
               discounted  for  being   "restricted   securities"  and  lack  of
               liquidity.  The Registrant became obligated to issue such 100,000
               shares  of  Common  Stock to Joe Foor for his  services  when the
               merger  transaction  which became effective on April 3, 1998, and
               the shares are deemed to have been issued on such date.

                    The issuance of these  shares will be exempt  under  Section
               4(2) of the  Securities  Act.  These shares are being issued to a
               Director of the Registrant. Such person has access to information
               concerning the Registrant and the ability to fend for himself. In
               addition,  he will take the shares for investment.  See "Item 11.
               Security Ownership of Certain Beneficial Owners and Management."

<PAGE>


                    (c ) Effective May 4, 1998,  the Board of Directors  granted
               stock options to Messrs.  Barker,  Love and Foor,  subject to the
               approval of the shareholders. Each of the options is subject to a
               separate  stock option  agreement and is not part of a plan.  The
               three   options   are   exercisable   to   purchase  a  total  of
               100,000 shares of the  Registrant's  Common  Stock at  $1.30  per
               share.

                    Mr.  Barker's  option is  exercisable  to  purchase  500,000
               shares  of  Common   Stock.   The   option  is  not   immediately
               exercisable.  It vests and becomes exercisable in full at the end
               of any  quarter  during  any  fiscal  year  when  the  cumulative
               "Operating Profit Before Corporate Overhead" for such fiscal year
               to date equals or exceeds $1,065,483.

                    Mr.  Barker's  option has a term of 10 years and  expires on
               May 4, 2008.

                    The  options  granted  to Mr.  Love  and Mr.  Foor  are each
               immediately  exercisable to purchase 250,000 shares.  Each option
               has a term of 10 years and expires on May 4, 2008. The purpose of
               the options  granted to Mr.  Love and Mr.  Foor is to  compensate
               them for serving as Directors of the Registrant.

                    The grant of the options was exempt  under  Section  4(2) of
               the  Securities  Act.  These  options  were  granted to the three
               Directors  of  the  Registrant,  one of who  is  also  the  Chief
               Executive Officer of the Registrant. The optionees have access to
               information concerning the Registrant and the ability to fend for
               themselves.  In  addition,  the  optionees  took the  options for
               investment. The issuance of the underlying shares of Common Stock
               upon exercise of the options will likewise be exempt for the same
               reason.  However,  the Registrant plans to register the shares of
               Common Stock  underlying the options on Form S-8 whenever  anyone
               of the three optionees  advises the Registrant that he would like
               to exercise  part or all of his option.  See "Item 10.  Executive
               Compensation."

Item 6.  Management's Discussion and Analysis or Plan of Operation.

         Overview

         Effective  April  3,  1998,  pursuant  to  an  agreement  and  plan  or
reorganization and merger,  between the Registrant and Phy.Med.,  Inc. (PHYMED -
Dallas),  the Registrant acquired 80% of the outstanding capital stock of PHYMED
- - Dallas in exchange for  6,891,541 shares  of common stock.  The  merger, which
results in the former PHYMED - Dallas shareholders owning approximately 87.9% of
the  outstanding  Common Stock of the  Registrant,  will be  accounted  for as a
recapitalization of PHYMED - Dallas.

<PAGE>


         In December  1998 the  Registrant  negotiated a  professional  services
contract  for  radiological  services  following  the  retirement  of the  prior
radiologist. This new agreement provides for reimbursement based on a percentage
of "global"  charges  collected  as opposed to the  previous  arrangement  which
provided for separate billing of technical and professional services. This along
with the opening of the additional  imaging center (Hillcrest) in September 1999
resulted in a 40%  increase of net revenues for the fiscal year 1999 as compared
to the prior year.

         The Registrant,  on a consolidated basis, has taken additional steps in
1999 and 2000 to increase  profitability and cash flow, and is developing a plan
to raise additional capital including:

          o    Provided $198,000 through a limited liability corporation

          o    Provided  $335,000  through  interim  financing of trade  account
               receivable

          o    Joined with a leasing  organization  to purchase  and operate the
               Siemen's MRI in a joint venture

          o    Entering into a accounts  receivable  financing  arrangement that
               will provide, by formula, up to $1,150,000 in funding (commitment
               letter executed on February 18, 2000 with closing in March 2000)

         Management   believes  that  these  actions  will  provide   sufficient
liquidity  to enable the  Registrant  to meet its  obligations  and  continue in
business. However there is no assurance such actions will be successful.

Fiscal 1998 as compared to 1997

         The following  table sets forth  operating  data of the Registrant as a
percentage of total revenues for the periods indicated:

                                                           Year Ended
                                                           December 31
                                                         1998       1997
                                                        -----------------
         Net revenue                                    100.0%     100.0%
            Operating expenses                         (115.5)    (102.9)
                                                        ----------------
           Operating profit                             (15.5)      (2.9)
         Other expenses                                  (7.6)     (14.5)
                                                        ----------------

         Net earnings (loss) before tax                 (23.1)     (17.4)

         Income tax                                       2.6        6.5
                                                        ----------------

         Net earnings (loss)                            (20.5)     (10.9)


                  Net revenues  increased  by $31,917  or 0.1% to $3,330,411 for
the year ended December 31, 1998 from $3,298,494 for the year ended December 31,
1997. This limited increase in net patient revenue was the result of: sales lost
to a "Registrant  managed" imaging center opened in January 1998 in Plano, Texas
(a suburb of Dallas,  Texas),  increased  contractual  allowance on managed care
contracts, increased contracted services revenue related to a capitated contract
that commenced in August 1998.

         Operating  expenses  increased by $452,231,  or 13.3% to $3,845,813 for
the year ended December 31, 1998 from $3,393,582 for the year ended December 31,
1997.  This  increase  was due  primarily  to the  expenses  resulting  from the
reorganization   between  Tatonka  Energy,   Inc.  and  PHYMED  -  Dallas,  Inc.
($157,000);  the costs  associated  with the  implementation  of a new  computer
system for clinical and image management; increased salary expense ($100,000).

         Operating losses  increased by $420,314,  or 442% to ($515,402) for the
year ended  December  31, 1998 from  ($95,088)  for the year ended  December 31,
1997. The increased  operating loss was primarily the result of little  increase
in net patient  revenue while  operating  expenses were increased by the cost of
the merger and installation of the computer system.

         Other expenses decreased by $225,990, or 47.2% to $252,581 for the year
ended December 31, 1998 from $478,571 for the year ended December 31, 1997. This
decrease  is  primarily   related  to  reduced   interest   expense   ($150,686)
attributable  to reduction of notes payable  related to the purchase of treasury
stock and to the ESOP stock acquisition.

         The net loss  before  income tax benefit  increased  $194,324 or 34% to
($767,983) for the year ended December 31,1998 from($573,659) for the year ended
December 31, 1997.

<PAGE>


LIQUIDITY AND CAPITAL RESOURCES

         In February  1998 the bank  factoring the patient  accounts  receivable
decided  to leave the asset  lending  business.  In April it called  the line of
credit PHYMED- Dallas had been using for its operating  credit line. The balance
owed in the amount of $738,755  was repaid  through a monthly  payment plan that
reduced the funds available for operations by  approximately  $60,000 per month.
The balance outstanding at December 31, 1998 was $281,919. In September 1999 the
entire balance was retired. The Registrant is currently negotiating with another
financial  institution to arrange new financing of accounts  receivable on terms
more favorable to the  Registrant.  There is no assurance  that any  refinancing
will take place or that it will be on terms favorable to the Registrant.

         The  unscheduled  repayment of $476,836 to the  factoring  organization
during the fiscal year ended  December 31, 1998 resulted in less cash  available
for operations. This coupled with the unpaid reorganization expenses resulted in
an increase of  $616,902,  or 167% to  $985,728  in trade  accounts  payable and
accrued expenses at December 31, 1998 from $368,826 at December 31, 1997.

         In July 1998 DVI Finance  Company  (DVI) filed suit seeking  payment on
its financing and in August 1998 obtained an injunction  against PHYMED - Dallas
disbursing  funds without consent of DVI. This suit was settled in December 1998
for $245,530 in principal and interest plus $21,130 in related  expenses and the
injunction  was dissolved.  The repayment was funded by refinancing  the related
equipment on thirty-six month installment loan.

         At December 31, 1998 PHYMED Dallas, a subsidiary of the Registrant, was
in default on certain equipment  financings  Siemens Credit  Corporation.  These
financings  constitute   $1,664,247  of  the  $1,989,104 current  maturities  of
long-term debt at December 31, 1998.  Subsequently  Siemens has  accelerated the
financings  and  removed   the  equipment (an MRI) in July 1999.  Litigation  is
pending in the Unites District Court of the Northern District of Texas.

         In  December  1999 a joint  venture  formed  by the  Registrant  and an
equipment  leasing  company  repurchased  the  Siemens MRI from  Siemens  Credit
Corporation  for  $600,000.  The MRI is to be operated for the joint  venture by
PHYMED  Contracted  Services  Corporation in the White Rock imaging center.  The
purchase price is a direct offset to the balance due Siemens Credit  Corporation
as described in the paragraph above.

         In July 1999 the Registrant  formed PHYMED PRIVATE  PARTNERS  L.L.C. (A
Nevada limited liability corporation) for the purpose of raising $220,000 in the
form of eleven $20,000 units  consisting a five-year note and a 5,000 warrant to
purchase PHYMED,  INC. common stock for $0.50 per share. The placement was fully
subscribed. The net proceeds were used to purchase certificates of deposit which
then was used to collateralize $198,000 in loans to the Registrant.


<PAGE>


         In September 1999 the Registrant  borrowed  $335,000 from an individual
for one  year  with the  accounts  receivable  of its  subsidiaries  pledged  as
collateral. The proceeds were used to open the PHYMED - Hillcrest imaging center
and retire some accounts payable.

The real estate lease related to the premises occupied by the Registrant and its
subsidiary  PHYMED - Dallas on White  Rock  Trail is in  default  and in arrears
approximately  $63,000 at December 31, 1998. In February 2000 the Registrant and
the landlord agreed to a new lease that made the Registrant  current on its rent
payments for the White Rock offices effective April 1, 2000.

Item 7. Financial Statements

         The following financial statements are attached to this report:

                  Balance Sheet - December 31, 1998

                  Statements of Operations -
                  Year ended December 31, 1998 and 1997

                  Statement of Stockholders' Equity -
                  Year ended December 31, 1998 and 1997

                  Statements  of Cash Flows - Year ended  December  31, 1998 and
                  1997 Notes to Financial Statements

                                    PART III

Item 9. Directors, Executive Officers, Promoters and Control Persons; Compliance
with Section 16(a) of the Exchange Act

Directors

         The  shareholders  elected five Directors at the last Annual Meeting of
Shareholders on February 19, 1999. George C. Barker was elected as a director on
April 3, 1998, in connection with the Merger, to fill the existing vacancy.  The
term of the present  directors  will expire  concurrently  with the  election of
directors at the 1999 Annual Meeting of Shareholders.

         Messrs. Barker, Love and Foor were re-elected as Directors for the year
at the 1999 Annual Meeting of  Shareholders  and that two  additional  Directors
were elected; namely, Marilyn Moss (resigned October 1999) and Judith F. Barker.
George C. Barker and Judith F. Barker are married.

<PAGE>


         The Company's Certificate of Incorporation  provides that the number of
Directors  shall be as specified in the Bylaws,  and the Bylaws provide that the
number of Directors  shall be not less than one nor more than seven.  The Bylaws
further provide that the  shareholders  may at any annual meeting  determine the
number of  Directors,  and the number so  determined  shall  remain  fixed until
changed at a subsequent annual meeting.

         Each Director  elected at the 2000 Annual Meeting of Shareholders  will
serve  until  the next  Annual  Meeting  of  Shareholders  and  until his or her
successor has been duly elected and qualified.

Information Concerning Directors

         The  Directors  are listed below with brief  statements  setting  forth
their  principal  occupations  and  other  biographical   information.   Certain
information  concerning  the four members of the Board of Directors is set forth
in "Item 11. Security Ownership of Certain Beneficial Owners and Management."

                           George C. Barker
                           Joe R. Love
                           Joe P. Foor
                           Judith F. Barker

         George C. Barker has a background in management  and healthcare of more
than  twenty-five  years.  He was  appointed  to the Board of  Directors  of the
Registrant  in April 1998 after the  acquisition  of Phy.Med.,  Inc. At the same
time, he was also elected  Chairman of the Board,  President and Chief Executive
Officer. He co-founded Phy.Med., Inc. in 1990 and has been the President,  Chief
Executive  Officer and the  Chairman of the Board of  Directors  of that company
since 1993.  Mr.  Barker's  background  includes  financial  and  administrative
positions with large hospitals, division level management with national hospital
management companies and radiology center operations. His management duties have
included  responsibilities  for annual  budgets  exceeding $45 million and 1,100
employees.  He earned his MBA at Suffolk University and his undergraduate degree
at New Hampshire College and is 56 years old.

         Joe R. Love has been a Director since the Registrant's inception in the
early 1980's.  In addition to being co-founder and Chairman of CCDC, Inc., he is
on the Board of Directors of First Cash, Inc., a public company which operates a
chain of pawn shops, for which Mr. Love has served as a Board member since 1991.
He is also a director of Western  Country  Clubs,  Inc., a public  company which
operates country and western night clubs. He has been  instrumental in arranging
public  offerings  totaling  approximately  $52  million  for a  number  of  his
portfolio  companies.  Over the last ten years,  Mr.  Love has been  involved in
several  other  public  companies  as well as being  active in real  estate  and
restaurant  ventures.  His real  estate  activities  include  acting as  general
partner of a $94 million joint venture with Metropolitan Life Insurance Company.
He has also been involved as a partner in several Hilton  Hotels.  Mr. Love is a
graduate of the University of Oklahoma with a BBA and is 61 years old.

         Joe P. Foor has been a Director of the Registrant since 1996. He is the
Chief Executive Officer of Featherstone  Financial  Services,  representing such
clients as  Greenbriar  Corporation  (a  publicly-held  company based in Dallas,
Texas), Qual-Med, Inc., Catalyst Energy Systems, and other businesses.  Mr. Foor
holds a BA from The  University  of Oklahoma and a Masters  Degree from Southern
Methodist University and is 61 years old.

<PAGE>


         Judith F. Barker is a nominee for Director and has been  Secretary  and
Treasurer  of the  Registrant  since April 1998.  She has been the  Secretary of
PHYMED - Dallas  and the  Business  Office  Manager  for more than the last five
years. She has been involved in office  management,  health facility billing and
collections for over twenty years.  Her experience has been gained at individual
physician and large group  practice  offices,  hospitals  and credit  companies.
Since 1992,  she has played a key role in the  management  of PhyMed's  accounts
receivable. Mrs. Barker is 59 years old.

Board of Directors-Meetings and Committees

         The Board of Directors held two meetings during calendar year 1998. The
Board of Directors had no Audit Committee, Compensation or Nomination Committees
during 1998 and does not currently  have an Audit,  Compensation,  or Nomination
Committee.

Executive Officers


         After  the  1999  Annual  Meeting of Shareholders,  the  newly  elected
Directors re-elected the following officers for the coming year:

                  George C. Barker         Chairman of the Board, President
                                           and Chief Executive Officer

                  Marilyn Moss             Executive Vice President - Operations

                  Judith F. Barker         Secretary and Treasurer

Marilyn  Moss  resigned  from the Board of  Directors  and as an  officer of the
Registrant in October 1999

Item 10.  Executive Compensation

Executive Officers

         Mr. Joe R. Foor served as president of the Registrant  from  January 1,
1998 to April 3, 1998 with no compensation related to his service.

         In 1993,  PhyMed and Mr.  Barker  entered  into a  ten-year  employment
agreement  pursuant to which PHYMED - Dallas pays Mr. Barker $240,000 per annum.
In connection with the Merger, on April 3, 1998 Mr. Barker became an employee of
the  Registrant and the  Registrant  assumed the  obligations of PHYMED - Dallas
under the employment Merger.

         During the fiscal year ended  December 31,  1998,  George C. Barker was
the Chief Executive  Officer of the Registrant and the only executive officer of
the Registrant whose total compensation exceeded $100,000. theRegistrant paid or
accrued $240,000 of salary to Mr. Barker during such period.

         On May 4, 1998,  the Board of Directors of the  Registrant  granted Mr.
Barker an option to purchase 500,000 shares of Common Stock,  with vesting to be
contingent   upon  the  attainment  by  the  Registrant  of  certain   financial
objectives. For additional information, see "Stock Option Grants" below.

<PAGE>


Compensation of Directors

         On May 4, 1998, the  Board of Directors  granted  to each  Mr. Love and
Mr. Foor an option to purchase  250,000  shares of Common Stock.  The purpose of
the options  granted to Mr. Love and Mr. Foor is to compensate  them for serving
as Directors of the Registrant.  For additional  information,  see "Stock Option
Grants" below.

1998 Stock Option Grants

         Effective May 4, 1998, the Board of Directors  granted stock options to
Messrs. Barker, Love and Foor, subject to the approval of the shareholders. Each
of the options is subject to a separate  stock option  agreement and is not part
of a plan.  The three options are  exercisable  to purchase a total of 1,000,000
shares of the Registrant's Common Stock at $1.30 per share.

         Mr. Barker's option is exercisable to purchase 500,000 shares of Common
Stock.  The  option  is  not  immediately  exercisable.  It  vests  and  becomes
exercisable  in full at the end of any  quarter  during any fiscal year when the
cumulative  "Operating Profit Before Corporate Overhead" for such fiscal year to
date equals or exceeds $1,065,483.

         Mr.  Barker's  option  has a  term  of  10 years and  expires on May 4,
2008. The purpose of Mr.  Barker's stock option is to retain and incentivise him
as  Chairman  of  the  Board,  President  and  Chief  Executive  Officer  of the
Registrant.

         The options  granted to Mr. Love and Mr.  Foor is each  exercisable  to
purchase 250,000 shares. Each option is presently  exercisable and has a term of
10 years that expires on May 4, 2008. The purpose of the options  granted to Mr.
Love  and Mr.  Foor is to  compensate  them  for  serving  as  Directors  of the
Registrant.

         The number of shares  subject  to an option is subject to  proportional
adjustment  for any  increase or decrease in the number of shares  issued by the
Registrant  without receipt of consideration by the Registrant,  such as a stock
dividend or a stock split.

         The options are non-qualified  stock options under the Internal Revenue
Code of 1986.  As a general  rule,  no tax is imposed on the  optionee  upon the
grant of an option,  nor will the  Registrant  be entitled to a tax deduction by
reason of such grant.  Generally,  upon the  exercise of an option,  an optionee
will be treated as receiving compensation taxable as ordinary income in the year
of  exercise in an amount  equal to the excess of the fair  market  value of the
shares on the date of  exercise  over the  exercise  price.  Thereafter,  if the
holder holds the stock for a period of one year or less the sale will be treated
as subject to ordinary income tax rates.  Stock held for a period  exceeding one
year receives  capital gain tax rate treatment.  The Registrant will be entitled
to a tax  deduction in an amount  equal to the  compensation  recognized  by the
optionee.

<PAGE>


         Set forth  below is certain  information  with  respect to the  options
granted  as of  May  4,  1998,  subject  to  approval  of  the  options  by  the
shareholders.

                                New Plan Benefits
                                -----------------
                          1998 Stock Option Agreements
                          ----------------------------


Name and Position                   Dollar Value             Number of Shares
- ---------------------------------

George C. Barker                           0- (3)             500,000 (1)
 Chairman of the Board, President
 And Chief Executive Officer

Joe R. Love                               -0- (3)             250,000 (2)
 Director

Joe P. Foor                               -0- (3)              250,000 (2)
 Director

Executive Group                           -0- (3)              500,000 (1)

Non-Executive Director Group              -0- (3)              500,000 (2)

Non-Executive Officer                     -0-                    -0-
 Employee Group

- --------------------
(1)      Mr. Barker's option vests and becomes exercisable in full at the end of
         any  quarter  during any  fiscal  year when the  cumulative  "Operating
         Profit Before  Corporate  Overhead" for such fiscal year to date equals
         or exceeds $1,065.483.

(2)      Vested  immediately  upon the  date of  grant, May 4, 1998,  subject to
         approval of the stock options by the shareholders of the Registrant at
         the Annual Meeting.

(3)      The option  price is $1.30 per share,  as the Common Stock is presently
         constituted.  The dollar  value of the option is equal to (a) the value
         of one share of Common  Stock in excess of $1.30 per share,  multiplied
         by (b) the number of shares covered by the option. On December 31, 1999
         the bid and asked prices on the common stock were  approximately  $0.50
         to $0.75. Accordingly, the dollar value of the option is zero.

PhyMed Employee Stock Ownership Plan

         In 1993,  PhyMed  established an employee stock ownership plan ("ESOP")
for its employees.  Such plan is qualified  under the provisions of the Internal
Revenue  Code of 1986 as a defined  contribution  retirement  plan  designed  to
invest primarily in qualifying  employer  securities.  This provides a means for
employees to have an ownership interest in their employer.  Upon  establishment,
the ESOP purchased  certain shares of PhyMed from a shareholder  for a cash down
payment  and  a   promissory   note  payable  in   installments.   PhyMed  makes
contributions  to the ESOP which enable it to make timely  payments of principal
and interest on its note to the former  shareholder.  Mr. and Mrs. Barker own in
the aggregate  approximately  70% of the vested interests of participants in the
ESOP.  See "Item  11.  Security  Ownership  of  Certain  Beneficial  Owners  and
Management-Possible Change of Control."

<PAGE>


Section 16(a) Beneficial Ownership Reporting Compliance

         Section  16(a) of the  Securities  Exchange  Act of 1934 and the  rules
promulgated  thereunder  require that  directors and  executive  officers of the
Registrant and beneficial owners of greater than 10% of the Registrant's  Common
Stock file various  reports with the  Securities  and Exchange  Commission  (the
"SEC").  The  Registrant  has  reviewed  its files and made  inquiries by and on
behalf of the  Registrant.  Management  believes  that for the fiscal year ended
December 31,  1998,  reports were not timely filed by Joe R. Love or Joe P. Foor
with respect to 250,000  stock option each were granted on May 4, 1998 (See Part
III. "1998 Stock Option Grants").

Item 11.  Security Ownership of Certain Beneficial Owners and Management

         The following table sets forth certain  information,  as of December 1,
1998,  concerning the beneficial  ownership of Common Stock by all Directors and
nominees,  certain executive  officers,  all Directors and executive officers of
the Registrant,  as a group, and each person who beneficially  owns more than 5%
of the  7,843,001  outstanding  shares of Common Stock,  $.01 par value.  Unless
otherwise indicated, each person named has sole voting and investment power over
the shares indicated.

Name and Address                     Amount and Nature of           Percent
of Beneficial Owner                  Beneficial Ownership (1)      of Class (1)
- -------------------                  ------------------------      ------------

George C. Barker                         6,891,541 (2)(3)(4)         87.9%
9603 White Rock Trail, Suite 100
Dallas, Texas  75238

Joe R. Love                                511,714 (5)                6.3%
1601 N.W. Expressway, Suite 2101
Oklahoma City, Oklahoma

Joe P. Foor                                455,408 (6)                5.6%
3535 Northwest Parkway
Dallas, Texas 75225

Judith F. Barker                         6,891,541 (2)(3)(4)         87.9%
9603 White Rock Trail, Suite 100
Dallas, Texas  75238


All directors and officers               7,858,663                   94. 2%
   as a group (4 persons)

(1)  In February  1999,  the  shareholders  approved,  a 1-for-10  reverse stock
     split,  which  includes  increasing  the par value of the Common Stock from
     $.001 to $.01. The change in the par value of common stock became effective
     in March 1999.

(2)  Includes  5,384,016  outstanding  shares owned  directly by Mr.  Barker and
     1,507,524 outstanding shares owned by Phy.Med.,  Inc. Employee Stock Option
     Plan, as to which Mr. Barker is the sole trustee and has voting power.  Mr.
     and  Mrs.  Barker  own in the  aggregate  approximately  70% of the  vested
     interests of participants in the ESOP.


(3)  Does not include shares,  which can be purchased upon the exercise of stock
     option. On May 4, 1998, the Board of Directors granted Mr. Barker an option
     to purchase  500,000  shares of Common Stock with vesting to be  contingent
     upon the  attainment  by the  Registrant of certain  financial  objectives.
     Therefore,  it is not  presently  exercisable  and will not be  exercisable
     within  the  next 60  days.  For  additional  information,  see  "Item  10.
     Executive Compensation-1998 Stock Option Grants."

<PAGE>


(4)  George C. Barker and Judith F. Barker are married.  Mr. Barker is the owner
     of record or has the power to vote all the outstanding shares  beneficially
     owned by him. Mrs. Barker is also deemed to be the beneficial  owner of the
     same shares. Mrs. Barker disclaims any beneficial  ownership of shares held
     by Mr.  Barker as sole trustee of the ESOP but allocated to the accounts of
     ESOP participants other than Mr. or Mrs. Barker.

(5)  Includes  (a)  holdings of family  members of Mr.  Love,  (b) 6,828  shares
     issuable upon  conversion of Series A Preferred Stock held by a corporation
     controlled by Mr. Love,  and (c) 250,000 shares which can be purchased upon
     the exercise of a recently  granted stock option.  See "Item 10.  Executive
     Compensation-1998 Stock Option Grants."

(6)  Includes (a) 26,667 shares  issuable upon  conversion of Series A Preferred
     Stock held by Mr. Foor's wife,  Anne Foor, and (b) 250,000 shares which can
     be purchased  upon the exercise of a recently  granted  stock  option.  See
     "Item 10. Executive Compensation-1998 Stock Option Grants."


By virtue of his beneficial  ownership of Common Stock, Mr. Barker may be deemed
to be a  "parent"  of the  Registrant  as such term is  defined in the rules and
regulations of the Securities and Exchange Commission.

Possible Change of Control

         Prior to the Merger on April 3, 1998,  there were 800 common  shares of
PHYMED - Dallas outstanding, of which 500 were owned by Mr.Barker, individually,
and 300 were owned by the ESOP.

         In the Merger,  the 500 PHYMED - Dallas  common  shares owned by Barker
were converted into  immediate  ownership of and the right to receive  5,423,079
shares of Common  Stock of the  Registrant,  and 140 of the 300  PHYMED - Dallas
common   shares   owned  by  the  ESOP  were   converted  in  like  manner  into
1,518,462 shares of Common Stock of the  Registrant.  The remaining 160 PHYMED -
Dallas common shares held by the ESOP now  constitute the 20% of PHYMED - Dallas
common shares not owned by the Registrant.

         The 800  shares of PHYMED - Dallas  owned by Barker and the ESOP at the
time of the Merger were pledged to Patrick Alan  Luckett  ("Luckett")  to secure
the payment of (a) two promissory  notes payable to the order of Luckett,  which
were issued to him as partial  payment for shares of PhyMed  purchased from him,
and (b) a guaranty of such notes.

         On  September  21,  1993,   Barker  and  Luckett  owned  all  the  then
outstanding  common  shares of PhyMed,  Inc.,  each of them owning of 500 common
shares.  On such date Luckett sold 200 of his shares to PhyMed and 300 shares to
the ESOP. The sales were for cash and promissory  notes.  One note was issued by
PhyMed in the original  principal amount of $800,000  pursuant to the terms of a
Loan and Security  Merger dated  September 21, 1993,  and the second  promissory
note was issued by the ESOP in the original  principal amount of $800,000.  Both
notes were  guaranteed by Barker.  The PhyMed note was secured by the 200 shares
repurchased from Luckett by PhyMed;  the ESOP note was secured by the 300 shares
the ESOP purchased from Luckett; and the 500 shares already owned by Barker were
pledged to secure his guaranty of the two notes.

         The  aggregate of 6,891,541  shares of Common  Stock of the  Registrant
received by Barker and the ESOP as a result of the Merger have been  substituted
in the pledge for the 640 PHYMED - Dallas  shares which were  released  from the
pledge and converted into such shares of Common Stock of the Registrant. The 20%
of PHYMED - Dallas still owned by the ESOP remains pledged for such purpose.

         As of February 24,  2000,  the unpaid  principal  balance on the PhyMed
note was retired, and the ESOP note was $125,564.

         Mr. and Mrs.  Barker are  guarantors on the Siemens  Credit Corporation
lease that is currently in  litigation.  An adverse  outcome in that  litigation
could result in a possible change in control of the Registrant.

<PAGE>


Item 12.  Certain Relationships and Related Transactions

         On  or  about  July 21, 1997,  Richard  A. Green, Sr.,  controlled  the
Registrant  through Verde, Inc. It owned 205,114 shares of Common Stock, and Mr.
Green was a Director and President of the Registrant. On or about July 21, 1997,
Verde, Inc. sold its holdings to Richard Bowes and Joe R. Love for $50,000 cash,
and Mr. Green resigned all positions with the Registrant.

         During  1997,  Messrs.  Joe  R.  Love,  Joe  P.  Foor  and  an  outside
consultant,  Richard  Bowes,  rendered  services to the  Registrant,  partly for
services  rendered in connection  with Board  meetings and partly for consulting
services  consisting of due diligence  efforts regarding merger  candidates.  In
consideration  of such  services,  on October 16,  1997,  the Board of Directors
authorized  the  issuance  of  an  aggregate  of  300,000 shares,  as  presently
constituted,  to such  persons (100,000 shares  to each  of such  persons).  The
Registrant  treated  the shares as having  been earned in full and issued at the
end of the year,  December  31, 1997.  The  Registrant  valued such  services at
$60,000 and  recorded  that amount as an expense for 1997.  The Common Stock was
trading at  approximately  $0.60 per share on December 31, 1997. The shares were
valued  at $0.20  per  share,  on the basis of the  market  value of the  stock,
discounted for being "restricted  securities" and lack of liquidity,  as well as
the Registrant's lack of earnings and book value.

         On March 31, 1998, the Registrant  entered into a letter agreement with
Joe P. Foor and CCDC,  Inc., a company  controlled by Joe R. Love.  Mr. Foor and
CCDC, Inc. (the  "consultants")  agreed to provide certain specified  consulting
and advisory services of a corporate  development  nature, as the Registrant may
need. The Registrant  will pay the consultants a $36,000 annual  retainer,  plus
out-of-pocket  expenses.  The  consultants  will also earn a transaction fee for
each  acquisition  or capital  placement  completed the  Registrant.  The letter
agreement was terminated by mutual agreement in February 1999.

         George C. Barker owns a 50%  interest in and is  President  of American
Medical Imaging  Corporation  ("AMIC"),  which rents a mobile magnetic resonance
imaging ("MRI") machine to PHYMED Diagnostic Imaging - McAllen,  LLC in McAllen,
Texas.  PHYMED - Dallas and AMIC have a business  relationship which is embodied
in a Radiology Services Provider Agreement - Contracted  Services dated February
1, 1996.  This agreement has a one-year term,  which renews  automatically  each
year for one  additional  year unless  terminated  by one of the  parties.  AMIC
refers  patients to PHYMED - Dallas for MRI procedures AMIC is unable to perform
on its own MRI  machine.  PHYMED  -  Dallas  invoices  AMIC  directly  for  such
procedures  at a  discounted  fee of $300.00  per  procedure,  and AMIC pays the
invoices  directly to PHYMED - Dallas  upon  receipt.  PHYMED - Dallas  received
revenues of $149,000 in 1998 and $176,000 in 1997 from AMIC.

         PHYMED - Dallas  entered into a 10-year  Management/Licensing Agreement
with Medical Imaging of Plano,  Inc.  ("MIPI")  effective  January 14, 1998 with
respect to the operation of a new full service radiology center in Plano, Texas,
a suburb of Dallas,  under the name of "PhyMed Diagnostic Imaging Center Plano."
PHYMED - Dallas  managed  the new  center  until  September  30,  1999  when the
agreement  was  terminated  by mutual  consent.  Mr.  Barker owned 12.5% and was
President of MIPI.  As a part of the  termination  of the  agreement  Mr. Barker
transferred his 12.5%  ownership in MIPI to MIPI as payment for  indebtedness of
$102,153, owed MIPI by PHYMED  Contracted  Services  for  services  rendered  in
conjunction  with its capitated  contract between August 1998 and September 1999
(resulting in PHYMED - Contracted  Services owing Mr. Barker the  indebtedness).
Additionally,  Mr. Barker  resigned as both  President and Director of MIPI. Mr.
Barker has personally  guaranteed for three years $200,000 of MIPI's obligations
under equipment leases for equipment used at the new center.

         George C. Barker d/b/a "A/G Partners"  manages  for  a  monthly  fee  a
physician  practice of The PRS Group,  P.A.,  and Philip R. Shalen,  M.D. is the
sole  radiologist  employed  by it.  PHYMED  -  Dallas  does  not  have a direct
relationship with A/G Partners. This arrangement was cancelled by mutual consent
as of December 31, 1999.

<PAGE>


         On January 1, 1996,  PhyMed  and The PRS  Group,  P.A.  entered  into a
10-year  Radiology  Services  Agreement which provided that The PRS Group,  P.A.
would provide the  professional  service  component and PhyMed would provide the
technical component of the diagnostic  radiological  services rendered by PhyMed
at its Center.  PhyMed and The PRS Group, P.A. each bill patients separately for
their components of the diagnostic  services.  On September 1, 1997, the parties
entered  into  a  new  10-year  Radiology   Services  Agreement  which  contains
substantially  the same  provisions as the 1996  agreement.  This  Agreement was
canceled by mutual consent as of November 30, 1998.

         On July 18, 1998  Registrant  borrowed  $100,000 from Anne C. Foor, the
wife of  Director  Joe P.  Foor.  The 12 % note  was due  January  20,  1999 and
included  warrants to purchase 20,000 shares of common stock at $0.625 per share
expiring July 20, 2001. The note was renewed on January 20, 1999 for five months
and included  additional  warrants for 30,000 shares on the same terms.  On July
20, 1999 another renewal  extended the maturity to January 20, 2000 and included
additional  warrants  for 50,000 at $0.50 per share  expiring  January 20, 2002.
That note was  renewed on January 20,  2000 with a June 20,  2000  maturity  and
included  additional  warrants  to  purchase  20,000  shares  at $0.50 per share
expiring June 20, 2002.

Item 13. Exhibits and Reports on Form 8-K

         (a)      Exhibits

        1.1    Agreement  and Plan of  Reorganization  and Merger as of March 6,
               1998 by and among Tatonka Energy,  Inc. Tatonka Energy Subsidiary
               Phy.Med., Inc. and the Stockholders of PhyMed, Inc. (Exhibit 1)*

        1.2    Amendment  to  Agreement  and Plan of  Reorganization  and Merger
               dated as of March 6,  1998,  by and among  Tatonka  Energy,  Inc.
               Tatonka  Energy   Subsidiary,   Inc.   Phy.Med.,   Inc.  and  the
               Shareholders of PhyMed, Inc. (Exhibit 1.2)****

        3.1    Amended  Certificate of Incorporation of PHYMED,  INC. filed with
               the Secretary of State of Oklahoma on February 25, 1999

        3.2    Loan and  Security  Agreement  by and  between  PhyMed  Inc.,  as
               Borrower,  and  Patrick  A.  Luckett,  as  Lender,  and George C.
               Barker, as Guarantor, dated September 21, 1993 (Exhibit 3.1)***

        3.3    $800,000  Note Dated  September  21, 1993 from  PhyMed,  Inc.  to
               Patrick A. Luckett (Exhibit 3.3)***

        3.4    $800,000  Note  dated  September  21,  1993 from  Phy.Med.,  Inc.
               Employee Stock Ownership Plan of Phy.Med., Inc. (Exhibit 3.3)***

        3.5    Note Purchase  Agreement  (undated  but)  executed  September 21,
               1993, by and between Patrick A. Luckett,  Phy.Med.,  Inc. and the
               Employee Stock Ownership Plan of Phy.Med., Inc. (Exhibit 3.4)***

        3.6    Guaranty  Agreement dated September 21, 1993, signed by George C.
               Barker in favor of Patrick Alan Luckett (Exhibit 3.5)***

<PAGE>


        3.7    Limited waiver of Certain Rights and Remedies executed by Patrick
               Alan Luckett on October 24, 1998 (Exhibit 3.6)***

        10.1   Employment  Agreement  dated October 1, 1993,  between  Phy.Med.,
               Inc.  and George C.  Barker  (assumed by  Registrant  on April 3,
               1998) (Exhibit 10.5)**

        10.2   Stock Option Agreement dated May 4, 1998, between the Company and
               George C. Barker (Exhibit 10.6)**

        10.3   Stock Option Agreement dated May 4, 1998, between the Company and
               Joe R. Love (Exhibit 10.7)**

        10.4   Stock Option Agreement dated May 4, 1998, between the Company and
               Joe P. Foor (Exhibit 10.8)**

        10.5   Letter Agreement dated March 31, 1998 by and among the Registrant
               and CCDC, Inc. and Joe For (Exhibit 10.9)**

        10.6   Loan and Security  Agreement  (undated) between Medical Equipment
               Finance  Company and Phy.Med.,  Inc. [This is the "DVI" financing
               document.  Medical  Equipment  Finance Company is a subsidiary of
               DVI.] (Exhibit 10.6)***

        10.7   Equipment  Lease  Agreement,   effective July 11,  1995,  between
               Siemens Credit Corporation and Phy.Med., Inc. (Exhibit 10.7)***

        10.8   Promissory  Note of Phy.Med.,  Inc.  (undated) to Siemens  Credit
               Corporation in the principal amount of $175,000 (Exhibit 10.8)***


        10.9  (Real Estate) Lease Agreement made and entered in as of March 15,
               1996, between  Cocanougher Feed Co., Inc. d/b/a Cocanougher Asset
               Management, ("Lessor"), and PhyMed, Inc., d/b/a PhyMed Diagnostic
               Imaging Center ("Lessee") (Exhibit 10.9)***

        10.10  Management/Licensing  Agreement  dated  January  4, 1998  between
               Phy.Med.,  Inc.  and  Medical  Imaging  of Plano,  Inc.  (Exhibit
               10.10)**

        10.11  Radiology Service Provider Agreement - Contracted  Services dated
               February 1, 1996 between  Phy.Med.,  Inc.  and  American  Medical
               Imaging Incorporated (Exhibit 10.11)**

        10.12  Radiology  Services  Agreement dated  September 1, 1997,  between
               Phy.Med., Inc. and the PRS Group, P.A. (Exhibit 10.13)**

        10.13  Amendment  dated  February  23,  2000 to Stock  Option  Agreement
               dated May 4, 1998 between Registrant and George C. Barker

        10.14  Amendment  dated  February  23,  2000 to Stock  Option  Agreement
               dated May 4, 1998 between Registrant and Joe. R. Love

        10.15  Amendment  dated  February  23,  2000 to Stock  Option  Agreement
               dated May 4, 1998 between Registrant and Joe. P. Foor

        10.16  Master Lease  Agreement  Number 11053 effective  October 11, 1999
               between  Prime  Leasing  Company  and PHYMED  Diagnostic  Imaging
               Center -  Hillcrest.,  Inc.  (a wholly  owned  subsidiary  of the
               Registrant)

        10.17  Lease Schedule Number 1 to master Lease Agreement Number 11053

<PAGE>


        10.18  Amendment to Lease Schedule  Number 1 to Master Leasse  Agreement
               Number 11053

        10.19  Master Lease Agreement  Number 11500 effective  February 11, 2000
               between  Prime  Leasing  Company  and PHYMED  Diagnostic  Imaging
               Center - White  Rock,  Inc.  (a wholly  owned  subsidiary  of the
               Registrant)

        10.20  Lease Schedule Number 1 to master Lease Agreement Number 11500

        10.21  Agreement of Limited  Partnership ( White Rock JV, Ltd.)  between
               LDE  Ventures,  Inc.  and  Registrant  dated  December  18,  1999
               regarding the operation and use of the Siemens 1.5 MRI

        10.22  Master Lease Agreement  Number 11113 effective  Feburary 11, 2000
               between Prime Leasing Company and White Rock JV, Ltd.

        10.23  Lease Schedule Number 1 to master Lease Agreement Number 11113

        10.24  Management  and Agreement  dated  December 11, 1999 between White
               Rock JV,  Ltd.  and PHYMED  Contracted  Services  Corporation  (a
               wholly owned subsidiary of the Registrant)

        10.25  Office  Lease  Agreement  made and entered in as of  September 8,
               1999,   between  AETNA  Life  Insurance   Company   (Lessor)  and
               Registrant

          27   Financial Data Schedule

         *  Incorporated  by  reference  to the  exhibit  number  set  forth  in
parentheses,  which exhibit was filed with the Company's Form 8-K filed April 8,
1998

         **  Incorporated  by  reference  to the  exhibit  number  set  forth in
parentheses,  which  exhibit was filed by the  Registrant's  Form 10-KSB for the
year ended December 31, 1997. The Form 10-KSB was filed June 16, 1998.

         ***  Incorporated  by  reference  to the  exhibit  number  set forth in
parentheses,  which  exhibit was filed by the  Registrant's  Form 10-QSB for the
quarter ended June 30, 1998. The Form 10-QSB was filed December 3, 1998

         ****  Incorporated  by  reference  to the  exhibit  number set forth in
parentheses  which  exhibit  was  filed by the  Registrant's  Form  8-K/A  filed
December 8, 1998

         (b)      Reports on form 8-K

         No report on Form 8-K was filed during the fourth (last) quarter of the
fiscal year ended December 31, 1998.


<PAGE>


                                   SIGNATURES

         In accordance  with Section 13 or 15(d) of the Securities  Exchange Act
of 1934, the Registrant has caused this report to be signed on its behalf by the
undersigned, thereunto duly authorized.

                                           TATONKA ENERGY, INC.
                                           Registrant

Date:    March 1, 2000                     BY:   /s/ George C. Barker
                                              -----------------------
                                           George C. Barker

                                           President and Chief Executive Officer

                                           By:  /s/ David L Moore
                                              -----------------------
                                           DAVID L. Moore
                                           Chief Financial Officer

         In accordance with the Securities Exchange Act of 1934, this report has
been signed below by the following  persons on behalf of the  Registrant  and in
the capacities and on the dates indicated.

Date: March 1, 2000                        BY:  /s/Judith F. Barker
                                              --------------------------------
                                                Judith F. Barker, Director

Date: March 1, 2000                        BY: /s/  Joe P. Foor
                                              --------------------------------
                                                Joe P. Foor, Director

                                           BY:
                                              --------------------------------
                                                Joe R. Love





<PAGE>



                          INDEX TO FINANCIAL STATEMENTS

                                                                           Pages
                                                                           -----

Report of Independent Certified Public Accountants                           F-2


Financial Statements

         Consolidated Balance Sheet at December 31, 1998                     F-3

         Consolidated Statements of Operations for the years ended
               December 31, 1998 and 1997                                    F-5

         Consolidated Statements of Changes in Shareholders' Deficit

               for the years ended December 31, 1998 and 1997                F-6

         Consolidated Statements of Cash Flows for the years ended
               December 31, 1998 and 1997                                    F-7

         Notes to Consolidated Financial Statements                          F-8








                                      F-1


<PAGE>





               Report of Independent Certified Public Accountants

To the Board of Directors and Shareholders
PHYMED, INC.

We have audited the accompanying  consolidated balance sheet of PHYMED, INC. and
Subsidiaries as of December 31, 1998, and the related consolidated statements of
operations, changes in shareholders' deficit, and cash flows for each of the two
years  in  the  period  then  ended.   These   financial   statements   are  the
responsibility of the Company's management.  Our responsibility is to express an
opinion on these financial statements based on our audits.

We  conducted  our  audits  in  accordance  with  generally   accepted  auditing
standards.  Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements are free of material
misstatement.  An audit includes examining, on a test basis, evidence supporting
the amounts and disclosures in the financial statements.  An audit also includes
assessing the  accounting  principles  used and  significant  estimates  made by
management as well as evaluating the overall financial  statement  presentation.
We believe our audits provide a reasonable basis for our opinion.

In our opinion,  the financial  statements  referred to above present fairly, in
all material respects,  the consolidated  financial position of PHYMED, INC. and
Subsidiaries  as of December 31,  1998,  and the  consolidated  results of their
operations  and their  consolidated  cash flows for each of the two years in the
period then ended in conformity with generally accepted accounting principles.

The accompanying  financial  statements have been prepared  assuming the Company
will  continue  as a going  concern.  As  shown  in the  accompanying  financial
statements,  the Company  incurred  net losses of $679,983  and $360,659 for the
years ended  December  31, 1998 and 1997,  respectively,  and as of December 31,
1998  the  Company's  current   liabilities   exceeded  its  current  assets  by
$2,440,110.  These factors, among others as discussed in Note C to the financial
statements, raise substantial doubt about the Company's ability to continue as a
going concern.  Management's plans in regard to these matters are also described
in Note C. The financial  statements do not include any  adjustments  that might
result from the outcome of this uncertainty.

GRANT THORNTON LLP

Dallas, Texas
October 29, 1999


                                      F-2

<PAGE>





                          PHYMED, INC. and Subsidiaries

                           CONSOLIDATED BALANCE SHEET

                                December 31, 1998

                                     ASSETS

CURRENT ASSETS

   Accounts receivable - trade, less allowance for
       doubtful accounts and contractual allowances
       of $970,000                                                  $   895,810
   Receivable - related party                                            26,027
                                                                    -----------

                  Total current assets                                  921,837

PROPERTY AND EQUIPMENT

   Clinic and medical equipment                                       3,566,690
   Furniture and equipment                                               95,042
   Computer hardware and software                                       403,450
   Leasehold improvements                                               381,420
                                                                    -----------
                                                                      4,446,602
       Less accumulated depreciation and amortization                (3,433,016)
                                                                    -----------
                                                                      1,013,586

OTHER ASSETS

   Noncurrent accounts receivable - trade, less
       allowance for doubtful accounts and
       contractual allowances of $442,000                               252,082
   Other                                                                 17,322
                                                                    -----------
                                                                        269,404

                                                                    $ 2,204,827
                                                                    ===========





        The accompanying notes are an integral part of these statements.

                                       F-3
<PAGE>


                          PHYMED, INC. and Subsidiaries

                     CONSOLIDATED BALANCE SHEET - CONTINUED

                                December 31, 1998

                      LIABILITIES AND SHAREHOLDERS' DEFICIT


CURRENT LIABILITIES

   Current maturities of long-term debt                             $ 1,989,104
   Accounts payable - trade                                             632,819
   Accounts payable - related parties                                   105,196
   Payable to factor                                                    281,919
   Accrued expenses                                                     352,909
                                                                    -----------

                  Total current liabilities                           3,361,947

LONG-TERM LIABILITIES

   Long-term debt, less current maturities                              580,076
   Deferred rent                                                         34,387
                                                                    -----------

                  Total liabilities                                   3,976,410

COMMITMENTS AND CONTINGENCIES                                              --

SHAREHOLDERS' DEFICIT

   Common stock - $.01 par value per share; authorized,
       50,000,000 shares; issued and outstanding,
       7,843,097 shares                                                  78,431
   Series "A" nonvoting convertible preferred stock, $1 par
       value per share; issued and outstanding, 135,139 shares          135,139
   Additional paid-in capital                                               999
   Unearned ESOP compensation                                          (220,449)
   Accumulated deficit                                               (1,765,703)
                                                                    -----------

                  Total shareholders' deficit                        (1,771,583)
                                                                    -----------

                                                                    $ 2,204,827
                                                                    ===========



        The accompanying notes are an integral part of these statements.

                                       F-4
<PAGE>


                          PHYMED, INC. and Subsidiaries

                      CONSOLIDATED STATEMENTS OF OPERATIONS






                                                       Years ended December 31,
                                                     ---------------------------
                                                        1998            1997
                                                     -----------    -----------
                                                                     (restated)

Net patient revenue                                  $ 3,330,411    $ 3,298,494

Operating expenses                                    (3,845,813)    (3,393,582)
                                                     -----------    -----------

                  Operating loss                        (515,402)       (95,088)

Other income (expenses)

   Interest expense                                     (228,884)      (379,570)
   Factoring fees                                        (66,869)      (100,041)
   Miscellaneous income                                   43,172          1,040
                                                     -----------    -----------
                                                        (252,581)      (478,571)
                                                     -----------    -----------

                  Net loss before income tax benefit    (767,983)      (573,659)

Deferred income tax benefit                               88,000        213,000
                                                     -----------    -----------

                  NET LOSS                           $  (679,983)   $  (360,659)
                                                     ===========    ===========

Loss per share - basic and diluted                         $(.09)         $(.05)
                                                           =====          =====

Weighted average shares                                7,843,097      7,605,208





        The accompanying notes are an integral part of these statements.

                                       F-5



<PAGE>

<TABLE>
<CAPTION>


                          PHYMED Inc. and Subsidiaries

           CONSOLIDATED STATEMENT OF CHANGES IN SHAREHOLDERS' DEFICIT



                                                                                                                    Retained
                                                  Common stock                       Additional     Unearned         earnings
                                          -------------------------    Preferred      paid-in        ESOP         (accumulated
                                             Shares        Amount        stock        capital     compensation      deficit)
                                          -----------   -----------   -----------   -----------   ------------    -----------
<S>                                       <C>           <C>           <C>           <C>            <C>            <C>

Balance at January 1, 1997, as restated         1,000   $     1,000   $      --     $      --      $  (446,615)   $   352,594

Amortization of unearned ESOP
   compensation, net of taxes of
   $13,000                                       --            --            --          22,254        113,083           --

Net loss                                         --            --            --            --             --         (360,659)
                                          -----------   -----------   -----------   -----------    -----------    -----------

Balance at December 31, 1997                    1,000         1,000          --          22,254       (333,532)        (8,065)

Merger of Tatonka Energy, Inc.
   and PHYMED, INC. and
   recapitalization                         7,842,097        77,431       135,139       (21,255)          --       (1,038,781)

Amortization of unearned ESOP
   compensation                                  --            --            --            --          113,083        (38,874)

Net loss                                         --            --            --            --             --         (679,983)
                                          -----------   -----------   -----------   -----------    -----------    -----------

Balance at December 31, 1998                7,843,097   $    78,431   $   135,139   $       999    $  (220,449)   $(1,765,703)
                                          ===========   ===========   ===========   ===========    ===========    ===========



                                                Treasury stock
                                          --------------------------
                                             Shares        Amount          Total
                                          -----------    -----------    -----------
Balance at January 1, 1997, as restated           226    $  (847,582)   $  (940,603)

Amortization of unearned ESOP
   compensation, net of taxes of
   $13,000                                       --             --          135,337

Net loss                                         --             --         (360,659)
                                          -----------    -----------    -----------

Balance at December 31, 1997                      226       (847,582)    (1,165,925)

Merger of Tatonka Energy, Inc.
   and PHYMED, INC. and
   recapitalization                              (226)       847,582            116

Amortization of unearned ESOP
   compensation                                  --             --           74,209

Net loss                                         --             --         (679,983)
                                          -----------    -----------    -----------

Balance at December 31, 1998                     --      $      --      $(1,771,583)
                                          ===========    ===========    ===========

</TABLE>




        The accompanying notes are an integral part of these statements.

                                       F-6
<PAGE>


<TABLE>
<CAPTION>


                          PHYMED, INC. and Subsidiaries

                      CONSOLIDATED STATEMENTS OF CASH FLOWS

                                                                        Years ended December 31,
                                                                        --------------------------
                                                                            1998          1997
                                                                        -----------    -----------
                                                                                        (restated)
<S>                                                                     <C>            <C>

Cash flows from operating activities
    Net loss                                                            $  (679,983)   $  (360,659)
    Adjustments to reconcile net loss  to net cash
      provided by operating activities:
            Depreciation and amortization                                   543,827        623,055
            Amortization of unearned ESOP compensation                       74,209        148,337
            Deferred income taxes                                           (88,000)       132,000
            Changes in operating assets and liabilities
              Receivables                                                   448,655        190,344
              Prepaid expenses and other current assets                      (3,789)          --
              Other assets                                                   32,243         (4,996)
              Accounts payable and other current liabilities                722,098       (118,708)
              Other noncurrent liabilities                                      485         33,902
                                                                        -----------    -----------

                  Net cash provided by operating activities               1,049,745        643,275

Cash flows from investing activities

    Purchase of property assets                                             (32,417)          --
    Proceeds from sale of assets                                               --           21,057
    Merger                                                                      116           --
                                                                        -----------    -----------

                  Net cash provided by (used in) investing activities       (32,301)        21,057

Cash flows from financing activities

    Proceeds from (payments to) factoring company - net                    (476,836)       153,060
    Repayments of debt                                                     (947,330)      (783,139)
    Proceeds from debt                                                      369,489           --
                                                                        -----------    -----------

                  Net cash used in financing activities                  (1,054,677)      (630,079)
                                                                        -----------    -----------

                  Net increase (decrease) in cash                           (37,233)        34,253

Cash at beginning of period                                                  37,233          2,980
                                                                        -----------    -----------

Cash at end of period                                                   $      --      $    37,233
                                                                        ===========    ===========

SUPPLEMENTAL CASH FLOW INFORMATION:
     Interest paid                                                      $   171,204    $   393,771
                                                                        ===========    ===========
</TABLE>




        The accompanying notes are an integral part of these statements.

                                       F-7

<PAGE>



                          PHYMED, INC. and Subsidiaries

                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS




NOTE A  - BASIS OF PRESENTATION

   Effective April 3, 1998,  Tatonka Energy,  Inc. ( "Tatonka")  acquired 80% of
   the  outstanding  capital stock of Phy Med Diagnostic  Imaging Center Dallas,
   Inc.  ("PMDIC"),  pursuant to an  agreement  and plan of  reorganization  and
   merger (the Agreement).  The Agreement provided that  consideration  given by
   Tatonka was the issuance of 6,891,541 Tatonka common shares.

   At the date of the merger,  Tatonka had nominal  assets,  consisting  only of
   $116 in cash,  and no  liabilities.  The  terms of the  merger  result in the
   former PMDIC shareholders owning approximately 87% of the outstanding Tatonka
   common   stock.   Therefore,   the  merger  has  been   accounted  for  as  a
   recapitalization of PMDIC. The accompanying financial statements are those of
   PMDIC for all periods presented.

   At the annual meeting of shareholders held in February 1999, the shareholders
   approved (1) the change of Tatonka's name to PHYMED, INC., and (2) a 1-for-10
   reverse  split of the  common  stock.  All  share  amounts  herein  have been
   restated to give effect to the stock split.

NOTE B - NATURE OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

   Nature of Business
   ------------------

   The  Company is engaged  in the  business  of  operating  diagnostic  imaging
   centers, located in Dallas and McAllen, Texas.

   A summary of the significant  accounting  policies applied in the preparation
   of the accompanying financial statements follows.

   Principles of Consolidation
   ---------------------------

   The consolidated  financial  statements include the accounts of PHYMED, INC.,
   its  wholly-owned  subsidiaries,  PMDIC,  PhyMed  Contracted  Services,  Inc.
   (PMCS),  and  53%-owned  PhyMed  Diagnostic  Center-McAllen,  LLC.  (McAllen)
   (collectively   "the  Company").   Significant   intercompany   accounts  and
   transactions have been eliminated in consolidation.

   Revenue Recognition and Receivables
   -----------------------------------

   Net patient  revenue is recorded as services are  rendered,  at the estimated
   realizable  amounts from patients,  third-party  payers and others based upon
   contractual  arrangements.  Provisions  are made for estimated  uncollectible
   accounts and are reflected in the financial statements as bad debts, included
   in operating expenses.




                                      F-8


<PAGE>


                          PHYMED, INC. and Subsidiaries

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - CONTINUED





   NOTE B - NATURE OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING

                POLICIES - Continued

   Property and Equipment
   ----------------------

   Property and equipment are stated at cost less  accumulated  depreciation and
   amortization.  Depreciation  and  amortization  are  provided  for in amounts
   sufficient to relate the cost of depreciable  assets to operations over their
   estimated  service  lives,  which  range  from  three to five  years,  by the
   straight-line   method.   Leasehold   improvements   are   amortized  by  the
   straight-line  method over the lives of the respective  leases or the service
   lives of the improvements, whichever is shorter.

   Deferred Rent
   -------------

   The cost of the  Company's  lease for office  space is  accounted  for by the
   straight-line method. The difference between the net cash requirements of the
   lease and straight-line  method is reflected on the balance sheet as deferred
   rent.

   Use of Estimates
   ----------------

   In preparing  financial  statements in  conformity  with  generally  accepted
   accounting   principles,   management  is  required  to  make  estimates  and
   assumptions that effect the reported  amounts of assets and liabilities,  the
   disclosure of contingent  assets and liabilities at the date of the financial
   statements,  the  reported  amounts  of  revenues  and  expenses  during  the
   reporting period. Actual results could differ from those estimates.

   Cash and Cash Equivalents
   -------------------------

   Cash  equivalents  consist  of high  liquid  investments,  which are  readily
   convertible into cash and have a maturity of three months or less.

   Earnings (Loss) Per Share
   -------------------------

   Basic  earnings  (loss) per share is  computed  by  dividing  net loss by the
   weighted  average number of common shares  outstanding.  Diluted earnings per
   share  gives  effect to the  assumed  conversion  of  preferred  stock,  when
   dilutive.

   Stock-based Compensation
   ------------------------

   The Company  accounts for  stock-based  compensation  to employees  using the
   intrinsic value method.  Accordingly,  compensation cost for stock options to
   employees  is measured as the excess,  if any, of the quoted  market price of
   the  Company's  common  stock at the date of the  grant  over the  amount  an
   employee must pay to acquire the stock.



                                      F-9

<PAGE>

                          PHYMED, INC. and Subsidiaries

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - CONTINUED




   NOTE B - NATURE OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING

                POLICIES - Continued

   Fair Value of Financial Instruments
   -----------------------------------

   The carrying  amounts for cash,  accounts  receivable  and  accounts  payable
   approximate  fair value because of the short-term  nature of these  financial
   instruments.  The carrying  amount  reported for long-term debt  approximates
   fair value, as interest rates are tied to market.

NOTE C - GOING CONCERN MATTERS

    The accompanying  financial statements have been prepared in conformity with
    generally accepted accounting principles,  which contemplate continuation of
    the  Company as a going  concern.  The Company had net losses of $679,953 in
    1998 and $360,659 in 1997,  and at December 31,  1998,  current  liabilities
    exceeded  current  assets by $2,440,110.  Included in current  maturities of
    long-term  debt is $1,664,246  relating to a subsidiary's  financings  which
    were in  default at  December  31,  1998.  The lender has filed a lawsuit to
    collect the unpaid balances. See Note E and G.

    The Company has taken steps in 1999 to increase profitability and cash flow,
    and is developing a refinancing plan to raise additional capital. Management
    believes that these actions will provide sufficient  liquidity to enable the
    Company to meet its obligations and continue in business.  However, there is
    no assurance such actions will be successful.

NOTE D - PROPERTY AND EQUIPMENT

    Property and equipment  accounts  include $863,824 of assets which have been
    financed under leases classified as capital leases. The amounts  capitalized
    are the  lesser  of the fair  market  values  or the  present  values of the
    minimum  lease  payments of the leased  property.  As  discussed  in Note E,
    equipment  collateralizing  certain financing obligations was repossessed in
    August of 1999.  The net  carrying  value of the  equipment  was $549,000 at
    December 31, 1998.








                                      F-10



<PAGE>


<TABLE>
<CAPTION>

                          PHYMED, INC. and Subsidiaries

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - CONTINUED





NOTE E - LONG-TERM DEBT
<S>                                                                             <C>     <C>

                                                                                        December 31,
                                                                                           1998
                                                                                        ------------

       Promissory notes, payable in monthly installments through 2000, at interest
          rates ranging from 9.9% to 10.0%                                                $ 85,860

       Note payable  by the  Company's  Employee  Stock  Ownership  Plan for the
          purchase of common  shares,  payable in monthly  installments  through
          2000,  at an  interest  rate of 10.0%,  collateralized  by the  common
          shares acquired                                                                  272,566

       Note payable  to bank  payable in monthly  installments  through  2001 at
          prime plus 2% (9.75%) per annum, collateralized by accounts receivable
          and equipment                                                                    269,489

       Note payable to shareholder with monthly interest payments at 12% per
          annum, due January 2000, collateralized by accounts receivable                   100,000

       Capitalized lease obligations, payable in monthly installments through
          2001, collateralized by the related equipment                                  1,828,030

       Capitalized lease obligation, payable in monthly installments through
          2001, collateralized by the related equipment                                    293,552
                                                                                         ---------
                                                                                         2,849,497
       Less amount representing interest on capital lease obligations imputed
          at rates ranging from 7.5% to 9.5%                                              (280,317)
                                                                                         ---------
                                                                                         2,569,180
       Less current maturities                                                          (1,989,104)
                                                                                         ---------

                                                                                         $ 580,076
                                                                                          ========
    All debt is guaranteed by the Company's principal shareholder.

    Aggregate maturities of long-term debt at December 31, 1998, are as follows:

          Year ending
         December 31,
         ------------
              1999                                                                       $1,989,104
              2000                                                                          440,019
              2001                                                                          140,057
                                                                                          ---------

                                                                                         $2,569,180
                                                                                          =========
</TABLE>

                                      F-11

<PAGE>


                          PHYMED, INC. and Subsidiaries

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - CONTINUED




NOTE E - LONG-TERM DEBT - Continued

    At December  31,  1998,  a  subsidiary  was in default on certain  equipment
    financings, accounted for as capital leases, with Siemens Credit Corporation
    (Siemens).  Accordingly,  these  financings  have been  included  in current
    maturies of long-term  debt,  and  constitute  $1,664,246 of the  $1,989,104
    current  maturities  as of December 31, 1998.  On December 7, 1998,  Siemens
    accelerated maturity and in August of 1999,  repossessed the equipment.  See
    Note G regarding related litigation.

NOTE F - PREFERRED STOCK

    The Series A preferred  stock is  nonvoting,  and each share is  convertible
    into .6667  shares of common  stock.  Holders are  entitled to a 5% dividend
    when and if declared by the Board of Directors.

NOTE G - COMMITMENTS AND CONTINGENCIES

    Future minimum rental commitments under the noncancellable operating leases,
    which  relate  primarily  to office  and  medical  center  premises,  are as
    follows:

       Year ended December 31,
          1999                                                         $169,046
          2000                                                          173,591
          2001                                                          171,035
          2002                                                          168,800
          2003 and thereafter                                            27,727
                                                                       --------

          Total minimum payments required                              $710,199
                                                                       ========

    Rental expense totaled  approximately  $157,000 and $134,000 for  the  years
    ended December 31, 1998 and 1997, respectively.

    A subsidiary  of PHYMED,  INC. is defendant in a lawsuit  brought by Siemens
    Credit  Corporation for payments of approximately  $1,965,000  allegedly due
    under a  defaulted  equipment  lease  and a  promissory  note with an unpaid
    principal balance at December 31, 1998 of approximately $85,000. The outcome
    of this lawsuit is not determinable.

    Several other legal actions  arising in the ordinary  course of business are
    pending or in process against the Company. In the opinion of management, the
    eventual  disposition  of these  actions will not have a materially  adverse
    effect on the financial position,  results of operations or liquidity of the
    Company.


                                      F-12

<PAGE>

<TABLE>
<CAPTION>


                          PHYMED, INC. and Subsidiaries

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - CONTINUED




NOTE H - INCOME TAXES

    Following is a reconciliation  of the Company's income tax benefit with  the
    amount of tax computed at the federal statutory rate:

                                                                               Years ended December 31,
                                                                              ---------------------------
                                                                                  1998              1997
                                                                                 ------            ------
<S>                                                                           <C>                <C>

       Tax benefit at statutory rate                                          $ 261,000          $195,000
       State taxes, net of Federal effect                                        22,000            18,000
       Nondeductible expenses                                                   (63,000)             --
       Change in valuation allowance                                           (116,000)             --
       Other                                                                    (16,000)             --
                                                                               --------           -------

                                                                              $  88,000          $213,000
                                                                               ========           =======

    The components of the deferred tax asset and liability are as follows:

                                                                                             December 31,
                                                                                                    1998
                                                                                             ------------
       Deferred tax assets

          Property and equipment                                                                $ 190,000
          Accounts payable and accrued expenses                                                   112,000
          Net operating loss carryforward                                                         323,000
                                                                                                 --------
                                                                                                  625,000

          Less valuation allowance
             Net operating loss carryover of Tatonka
               at April 3, 1998                                                                  (115,000)
             Other                                                                               (116,000)
                                                                                                 --------
                                                                                                  394,000

       Deferred tax liabilities

          Accounts receivable                                                                    (394,000)
                                                                                                ---------

       Net deferred tax asset                                                                   $    --
                                                                                                 ========
</TABLE>


    A valuation  allowance  has been  provided  against  deferred  tax assets at
    December  31,  1998,  because  of  uncertainties  regarding  their  ultimate
    realization.

    The Company  has net  operating  loss  carryovers  at  December  31, 1998 of
    approximately  $900,000, of which approximately $300,000 relates to Tatonka.
    The carryovers  expire, if not utilized,  from 2009 through 2018. Use of the
    carryovers  is  limited  by the change in  ownership  rules of the  Internal
    Revenue Code.




                                      F-13


<PAGE>


                          PHYMED, INC. and Subsidiaries

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - CONTINUED



NOTE I - LOSS PER SHARE

    Loss  per  share  has  been  calculated  based  upon the  number  of  shares
    (6,891,541) issued by PHYMED,  INC. on April 3, 1998, for the acquisition of
    PMDIC, with retroactive application to all periods presented. For the period
    subsequent to April 3, 1998,  weighted  average shares  outstanding  include
    also the outstanding shares of PHYMED, INC. (951,556) held by the pre-merger
    PHYMED, INC. shareholders.

    No effect has been given in the  calculation of loss per share to the effect
    of the Series A convertible  preferred stock,  because the result of assumed
    conversion is antidilutive.

NOTE J - STOCK OPTIONS

    In 1998, the Company granted stock options to its Chief  Executive  Officer,
    George Barker,  and two Directors to purchase shares of the Company's common
    stock at $1.30 per share.  The options have a 10-year  term.  Mr. Barker was
    granted  500,000  options that vest based on the Company  attaining  certain
    operating profit goals. The Directors were granted 250,000 options each that
    are  exercisable  immediately.  At December  31,  1998,  options to purchase
    500,000 shares were exercisable.

    The  Company  has  adopted  only  the  disclosure  provisions  of  Financial
    Accounting Standard No. 123, "Accounting for Stock-Based Compensation"  (FAS
    123).  It applies  APB  Opinion  No. 25,  "Accounting  for Stock  Issued  to
    Employees," and related Interpretations for accounting stock options.

    Had compensation  costs for stock based  compensation  plans been determined
    consistent with the fair value method of FAS 123, the Company's net loss and
    net loss per common share for 1998 would have been  $1,329,983 and $.17. The
    fair value of these  options  were  estimated at the date of grant using the
    Black-Scholes  option  pricing  model with the  following  weighted  average
    assumptions  used;  expected  volatility  693%,  risk  free  rate of 5.9% no
    dividend  yield and expected  life of 10 years.  The  weighted  average fair
    value of options granted during 1998 was $1.30 per share.







                                      F-14


<PAGE>


                          PHYMED, INC. and Subsidiaries

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - CONTINUED




NOTE K - EMPLOYEE STOCK OWNERSHIP PLAN

    The Company  sponsors a leveraged  employee stock ownership plan (ESOP) that
    covers all employees  who have  completed one year of service and who are at
    least 18 years of age. The Company  accounts for its ESOP in accordance with
    Statement  of Position  93-6,  "Employers'  Accounting  for  Employee  Stock
    Ownership Plans". Accordingly,  the Company reports in its balance sheet the
    debt of the ESOP and Unearned ESOP  Compensation.  The Company allocates the
    shares purchased by the ESOP to qualifying employees as payments are made on
    the debt of the ESOP.  As shares are  allocated  to  employees  the  Company
    records  compensation  expense  equal to the fair  value of the  shares,  as
    determined by an annual  independent  valuation.  The difference in the fair
    value of shares allocated to employees and the cost of the shares is charged
    or  credited to equity,  net of related  income  taxes.  All ESOP shares are
    pledged as collateral for the ESOP debt.

<TABLE>
<CAPTION>

    The status of ESOP shares was as follows:

                                                                                        December 31, 1998
                                                                                      ----------------------
                                                                                      PHYMED, INC.     PMDIC
<S>                                                                             <C>     <C>            <C>

        Allocated shares                                                                1,507,525         79

        Unallocated shares                                                                   --           55
                                                                                        ---------     ------

           Total ESOP shares                                                            1,507,525        134
                                                                                        =========     ======

        Fair value of unallocated shares                                                            $144,375
                                                                                                     =======

    The Company recognized expense under the plan of $74,210 in 1998 and $148,337
    in 1997.

</TABLE>


NOTE L - RELATED PARTY TRANSACTIONS

    Mr. George C. Barker,  the Company's  Chief  Executive  Officer and majority
    shareholder,  owns a 50% interest in and is  President  of American  Medical
    Imaging  Corporation  ("AMIC"),  which  rents a  mobile  magnetic  resonance
    imaging  ("MRI")  machine to  McAllen.  The Company and AMIC have a business
    relationship  which is embodied in a Radiology Services Provider Agreement -
    Contracted  Services dated  February 1, 1996.  This agreement has a one year
    term which renews  automatically  each year for one  additional  year unless
    terminated  by one of the parties.  AMIC refers  patients to the Company for
    MRI procedures AMIC is unable to perform on its own MRI machine. The Company
    invoices AMIC directly for such  procedures at a discounted  fee of $300 per
    procedure,  and AMIC pays the invoices directly to the Company upon receipt.
    PhyMed received revenues of $149,000 in 1998 and $176,000 in 1997 from AMIC.


                                      F-15


<PAGE>


                          PHYMED, INC. and Subsidiaries

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - CONTINUED




NOTE L - RELATED PARTY TRANSACTIONS - Continued

    The  Company  entered  into a 10-year  Management/Licensing  Agreement  with
    Medical  Imaging of Plano,  Inc.  ("MIPI")  effective  January 14, 1998 with
    respect to the  operation of a new full service  radiology  center in Plano,
    Texas. The Company managed the new center until September 30, 1999, when the
    agreement  was  terminated by mutual  consent.  Mr. Barker owns 12.5% of the
    common  stock  of MIPI  and is its  President.  Mr.  Barker  has  personally
    guaranteed for three years,  $200,000 of MIPI's  obligations under equipment
    leases for equipment used at the new center. The  Management/Licensing  with
    MIPI was terminated by mutual consent of the parties on September 30, 1999.

    Mr.  George C.  Barker  d/b/a "A/G  Partners"  manages for a monthly fee the
    physician practice of The PRS Group, P.A. The Company does not have a direct
    relationship  with A/G  Partners.  On January  1,  1996,  PhyMed and The PRS
    Group,  P.A.  entered  into a 10-year  Radiology  Services  Agreement  which
    provided that The PRS Group,  P.A.  would provide the  professional  service
    component  and the Company  would  provide the  technical  component  of the
    diagnostic  radiological  services  rendered  at  its  Center.  Under   this
    arrangement  the  Company  and  The  PRS  Group,  P.A.  each  bill  patients
    separately for their components of the diagnostic services.  On September 1,
    1997, the parties entered into a new 10-year Radiology  Services  Agreement,
    which contains substantially the same provisions as the 1996 agreement. This
    Agreement was canceled by mutual consent as of November 30, 1998.

NOTE M - FOURTH QUARTER ADJUSTMENTS

    During  the fourth  quarter  of 1998,  the  Company  recorded  approximately
    $700,000 in charges related to contractual allowances and bad debts.

NOTE N - RESTATEMENT

    The Company has  determined  that the  allowance  for doubtful  accounts and
    contractual allowances was understated by $684,000 at December 31, 1997 and,
    accordingly,  has restated its financial  statements for 1997. The effect of
    this restatement is as follows:

                                                             Increase (decrease)

         Net patient revenues                                     $(345,000)
         Deferred income tax benefit                                128,000
         Net loss                                                   217,000
         Accounts receivable at December 31, 1997                  (684,000)
         Retained earnings
           January 1, 1997                                         (214,000)
           December 31, 1997                                       (431,000)




                                      F-16

<PAGE>

                                 EXHIBITS

  1.1   Agreement and Plan of Reorganization and Merger as of March 6, 1998 by
        and among Tatonka Energy,  Inc.  Tatonka Energy  Subsidiary  Phy.Med.,
        Inc. and the Stockholders of PhyMed, Inc. (Exhibit 1)*

  1.2   Amendment to Agreement and Plan of Reorganization  and Merger dated as
        of March 6, 1998, by and among Tatonka  Energy,  Inc.  Tatonka  Energy
        Subsidiary,  Inc. Phy.Med.,  Inc. and the Shareholders of PhyMed, Inc.
        (Exhibit 1.2)****

  3.1   Amended  Certificate of Incorporation  of PHYMED,  INC. filed with the
        Secretary of State of Oklahoma on February 25, 1999

  3.2   Loan and Security  Agreement by and between  PhyMed Inc., as Borrower,
        and Patrick A. Luckett, as Lender, and George C. Barker, as Guarantor,
        dated September 21, 1993 (Exhibit 3.1)***

  3.3   $800,000 Note Dated September 21, 1993 from PhyMed, Inc. to Patrick A.
        Luckett (Exhibit 3.3)***

  3.4   $800,000 Note dated  September 21, 1993 from Phy.Med.,  Inc.  Employee
        Stock Ownership Plan of Phy.Med., Inc. (Exhibit 3.3)***

  3.5   Note Purchase  Agreement (undated but) executed September 21, 1993, by
        and between Patrick A. Luckett,  Phy.Med., Inc. and the Employee Stock
        Ownership Plan of Phy.Med., Inc. (Exhibit 3.4)***

  3.6   Guaranty  Agreement  dated  September  21,  1993,  signed by George C.
        Barker in favor of Patrick Alan Luckett (Exhibit 3.5)***

  3.7   Limited waiver of Certain Rights and Remedies executed by Patrick Alan
        Luckett on October 24, 1998 (Exhibit 3.6)***

  10.1  Employment Agreement dated October 1, 1993, between Phy.Med., Inc. and
        George C. Barker  (assumed by  Registrant  on April 3, 1998)  (Exhibit
        10.5)**

  10.2  Stock  Option  Agreement  dated May 4, 1998,  between  the Company and
        George C. Barker (Exhibit 10.6)**

  10.3  Stock Option Agreement dated May 4, 1998,  between the Company and Joe
        R. Love (Exhibit 10.7)**

  10.4  Stock Option Agreement dated May 4, 1998,  between the Company and Joe
        P. Foor (Exhibit 10.8)**

  10.5  Letter  Agreement dated March 31, 1998 by and among the Registrant and
        CCDC, Inc. and Joe For (Exhibit 10.9)**

  10.6  Loan  and  Security  Agreement  (undated)  between  Medical  Equipment
        Finance  Company  and  Phy.Med.,  Inc.  [This is the  "DVI"  financing
        document.  Medical  Equipment Finance Company is a subsidiary of DVI.]
        (Exhibit 10.6)***

  10.7  Equipment Lease  Agreement,  effective July 11, 1995,  between Siemens
        Credit Corporation and Phy.Med., Inc. (Exhibit 10.7)***

  10.8  Promissory  Note  of  Phy.Med.,   Inc.  (undated)  to  Siemens  Credit
        Corporation in the principal amount of $175,000 (Exhibit 10.8)***

  10.9  (Real  Estate)  Lease  Agreement  made and  entered in as of March 15,
        1996,  between  Cocanougher  Feed Co., Inc.  d/b/a  Cocanougher  Asset
        Management,  ("Lessor"),  and PhyMed,  Inc.,  d/b/a PhyMed  Diagnostic
        Imaging Center ("Lessee") (Exhibit 10.9)***

  10.10 Management/Licensing   Agreement   dated   January  4,  1998   between
        Phy.Med., Inc. and Medical Imaging of Plano, Inc. (Exhibit 10.10)**

  10.11 Radiology  Service  Provider  Agreement -  Contracted  Services  dated
        February 1, 1996 between  Phy.Med.,  Inc. and American Medical Imaging
        Incorporated (Exhibit 10.11)**

<PAGE>


  10.12 Radiology   Services   Agreement  dated  September  1,  1997,  between
        Phy.Med., Inc. and the PRS Group, P.A. (Exhibit 10.13)**

  10.13 Amendment dated February 23, 2000 to Stock Option  Agreement dated May
        4, 1998 between Registrant and George C. Barker

  10.14 Amendment dated February 23, 2000 to Stock Option  Agreement dated May
        4, 1998 between Registrant and Joe. R. Love

  10.15 Amendment dated February 23, 2000 to Stock Option  Agreement dated May
        4, 1998 between Registrant and Joe. P. Foor

  10.16 Master  Lease  Agreement  Number  11053  effective  October  11,  1999
        between Prime Leasing Company and PHYMED  Diagnostic  Imaging Center -
        Hillcrest., Inc. (a wholly owned subsidiary of the Registrant)

  10.17 Lease Schedule Number 1 to master Lease Agreement Number 11053

  10.18 Amendment  to Lease  Schedule  Number  1 to  Master  Leasse  Agreement
        Number 11053

  10.19 Master  Lease  Agreement  Number  11500effective   February  11,  2000
         between Prime Leasing Company and PHYMED  Diagnostic  Imaging Center -
        White Rock, Inc. (a wholly owned subsidiary of the Registrant)

  10.20 Lease Schedule Number 1 to master Lease Agreement Number 11500

  10.21 Agreement of Limited  Partnership  ( White Rock JV, Ltd.)  between LDE
        Ventures,  Inc. and  Registrant  dated December 18, 1999 regarding the
        operation and use of the Siemens 1.5 MRI

  10.22 Master  Lease  Agreement  Number  11113  effective  February  11, 2000
        between Prime Leasing Company and White Rock JV, Ltd.

  10-23 Lease Schedule Number 1 to master Lease Agreement Number 11113

  10.24 Management  and Agreement  dated  December 11, 1999 between White Rock
        JV, Ltd. and PHYMED  Contracted  Services  Corporation (a wholly owned
        subsidiary of the Registrant)

  10.25 Office  Lease  Agreement  made and entered in as of September 8, 1999,
        between AETNA Life Insurance Company (Lessor) and Registrant

  27    Financial Data Schedule





                        OFFICE OF THE SECRETARY OF STATE




                               STATE OF OKLAHOMA

                                [symbol omitted]

                                    AMENDED
                          CERTIFICATE OF INCORPORATION

              WHEREAS, the Amended Certificate of Incorporation of

                                  PHYMED, INC.

has been filed in the office of the  Secretary  of State as provided by the laws
of the State of Oklahoma.

NOW THEREFORE, I, the undersigned,  Secretary of State of the State of Oklahoma,
by virtue of the powers  vested in me by law, do hereby  issue this  certificate
evidencing such filing.

IN TESTIMONY  WHEREOF,  I have hereunto set my hand and caused to be affixed the
Great Seal of the State of Oklahoma.





                  Filed in the City of Oklahoma City this 25th
                                                         ------
                  day of February, 1999
                         --------  ----



                              /s/  illegible
                             ---------------------



                       By: /s/  illegible
                       ---------------------------------

[state seal
 symbol omitted]

<PAGE>


                                                                           FILED
                                                                     FEB 25 1999
                                                              OKLAHOMA SECRETARY
                                                                        OF STATE


                                    AMENDED
                          CERTIFICATE OF INCORPORATION
                      (AFTER RECEIPT OF PAYMENT OF STOCK)



TO: OKLAHOMA SECRETARY OF STATE
2300 N. Lincoln Blvd., Room 101, State Capitol Building
Oklahoma City, Oklahoma 73105-4897
(405)-522-4560

PLEASE  NOTE:  This  form  MUST be filed  with a letter  from the  Oklahoma  Tax
Commission,  Franchise  Tax  Department,  stating  that the  franchise  tax, due
yearly, has been paid for the current fiscal year.

The  undersigned  Oklahoma   corporation,   for  the  purpose  of  amending  its
certificate of incorporation as provided by Section 1077 of the Oklahoma General
Corporation Act, hereby certifies:

1.   A.   The name of the corporation is:
                              Tatonka Energy, Inc
- --------------------------------------------------------------------------------
     B.   As amended: The name of the  corporation has been changed to:
                              Phymed, Inc.
- --------------------------------------------------------------------------------
(Please Note: The new name of the corporation  MUST contain one of the following
words: association,  company, corporation, club, foundation, fund, incorporated,
institute,  society,  union,  syndicate  or limited or one of the  abbreviations
co.,corp.,inc. or ltd.)

2.   The name of the registered agent and the street address  of  the registered
office in the State of Oklahoma is:

  Joe R. Love    1601 N.W. Expressway,  Suite 1910 Oklahoma City, OK   73118
- --------------------------------------------------------------------------------
  Name of Agent    Street Address      City      County            Zip Code
                        (P.O. BOXES ARE NOT ACCEPTABLE)

3.   The duration of the corporation is:     Perpetual
                                        ----------------------------------------


<PAGE>


4.   The aggregate number of the authorized shares, itemized by class, par value
of shares, shares without par value, and series,if any, within a class is:

NUMBER OF SHARES                SERIES            PAR VALUE PER SHARE
                               (If any)    (Or, if without par value, so state)

COMMON  50,000,000                                     $0.01
                       Series "A" Preferred Stock
       -------------                                  ---------

PREFERRED  1,000,000                                   $1.00
          -----------                                 ---------

5.   Set  forth  clearly  any  and  all   amendments  to  the   certificate   of
incorporation which are desired to be made:

      See exhibit "A" attached hereto and incorporated herein for all purposes.







     That at a meeting of the Board of Directors,  a resolution was duly adopted
setting  forth  the  foregoing  proposed  amendment(s)  to  the  Certificate  of
Incorporation of said  corporation,  declaring said amendment(s) to be advisable
and calling a meeting of the shareholders of said corporation for  consideration
thereof.

     That thereafter,  pursuant to said resolution of its Board of Directors,  a
meeting of the  shareholders  of said  corporation  was duly called and held, at
which meeting the necessary number of shares as required by a statute were voted
in favor of the amendment(s).

     IN WITNESS  WHEROF,  said  corporation  has caused this  certificate  to be
signed by its  President  or Vice  President  and  attested by its  Secretary or
Assistant Secretary, this 19th day of February, 1999.




                                            /s/ George C. Barker
                                           ----------------------------------

                                               George C. Barker
                                           -----------------------------------
                                                   (PLEASE PRINT NAME)


ATTEST:


/s/  Judith F. Barker
- ----------------------
            Secretary

     Judith F. Barker
- ----------------------
  (PLEASE PRINT NAME)




<PAGE>



                              TATONKA ENERGY, INC.

          AMENDED ARTICLES 1 AND 5 OF THE CERTIFICATE OF INCORPORATION

         The present Article 1 of the  Certificate of  Incorporation  of Tatonka
Energy,  Inc. is deleted in its entirety and replaced with the following Article
1:

         "1.  The name of this Corporation is:

                                  PHYMED, Inc."

         The present Article 5 of the  Certificate of  Incorporation  of Tatonka
Energy,  Inc. is deleted in its entirety and replaced with the following Article
5:

         "5. The shares to be issued by the Corporation shall be of two classes,
         namely,  Voting  Common  Stock,  of a par value of One Cent ($0.01) per
         share,  and Preferred  Stock,  of a par value of One Dollar ($1.00) per
         share.  The Corporation  shall have the authority to allot an aggregate
         number of fifty million  (50,000,000) shares of the Voting Common Stock
         and an aggregate number of one million  (1,000,000) shares of Preferred
         Stock.

         A.  Authority of the Board of  Directors.  Regarding  Preferred  Stock,
         135,139   shares  are   designated  as  Series  "A"   Preferred   Stock
         (Non-Voting)  and  500,000  shares  are  designated  as  Series  B  12%
         Cumulative Convertible Preferred Stock. The Board of Directors shall be
         vested with and shall have the  authority to issue any or all shares of
         Preferred Stock in one or more series and by resolution or resolutions,
         to establish the designation, number, full or limited voting powers, or
         the denial of voting powers,  preferences and relative,  participating,
         optional, and other special rights and the qualifications, limitations,
         restrictions,  and other distinguishing  characteristics of each series
         to be issued;  provided,  however,  that the Board of Directors may not
         change  the rights and  preferences  of shares of Series "A"  Preferred
         Stock  (Non-Voting)  or Series B 12% Cumulative  Convertible  Preferred
         Stock,  which are  outstanding at the time any authorized  change is to
         take effect.

         B. Series B 12% Cumulative  Convertible  Preferred Stock. The "Series B
         12% Cumulative  Convertible  Preferred  Stock" (the "Series B Preferred
         Stock") shall have the powers, preferences and relative, participating,
         optional, and other special rights and the qualifications, limitations,
         restrictions, and other distinguishing characteristics set forth below.

                           (a) Voting Rights. The Series B Preferred Stock shall
                           be  nonvoting  stock,  and the  holders  (hereinafter
                           called  "Holders") of Series B Preferred  Stock shall
                           have no voting rights except where required by law.

                           (b) Dividend Rights.  Subject to the restrictions an
                           limitations of subparagraphs (ii) and (iii)   below,
                           the Holders of Series B Preferred  Stock shall be
                           entitled to receive dividends as provided in
                           subparagraph (i) below:

                                    (i) The Holders of Series B Preferred  Stock
                           shall be  entitled  to receive  dividends  out of any
                           funds  legally  available  for  that  purpose  at the
                           annual  rate of 12% of the amount of the  liquidation
                           preference and no more, payable annually,  or at such
                           shorter  intervals as the Board of Directors may from
                           time to time determine. Dividends shall accrue on all

                                       1

<PAGE>

                           shares of Series B Preferred Stock from the date they
                           are issued and shall accrue from day to day,  whether
                           or not earned or declared.  Such  dividends  shall be
                           payable  when,  as and if  declared  by the  Board of
                           Directors.  Nothing  contained  herein shall obligate
                           the Board of  Directors  to declare any  dividends to
                           the  Holders of Series B  Preferred  Stock,  and such
                           Holders  shall have no right to receive any dividends
                           unless and until  declared by the Board of  directors
                           in its sole and absolute discretion.  Dividends shall
                           be paid once a year within forty-five (45) days after
                           completion   of  the   audit  of  the   Corporation's
                           financial  statements  for each fiscal year.  Accrued
                           but unpaid  dividends on the Series B Preferred Stock
                           will  be  payable  before  any  dividends  are  paid,
                           declared,  or set  apart  for  holders  of any  other
                           series of  Preferred  Stock  junior  to the  Series B
                           Preferred  Stock or for holders of Common  Stock.  In
                           addition,  dividends  are  cumulative so that if, for
                           any dividend period,  the  preferential  dividends on
                           Series B Preferred  Stock are not paid,  or declared,
                           or set apart,  the  deficiency  must be fully paid or
                           declared and set apart, without interest,  before any
                           distribution  (by dividend or  otherwise) is paid on,
                           declared,  or set  apart  for  any  other  series  of
                           Preferred  Stock  junior  to the  Series B  Preferred
                           Stock or for Common Stock

                                    (ii)  Prior  to the  end of the  first  full
                           fiscal year  ending on or after  December  31,  1998,
                           during which the Corporation  shall have reported net
                           income  after  taxes  of  at  least  $1,200,000,   as
                           reflected  on  the  Corporation's  audited  financial
                           statements  for such  year,  the  Board of  Directors
                           shall  have the  right  and  option,  in its sole and
                           absolute  discretion,   at  any  time  or  times,  or
                           intermittently  from time to time,  to  determine  or
                           declare that  dividends  shall not accrue from day to
                           day  and,  accordingly,  shall  not be  paid,  on the
                           Series  B  Preferred  Stock.  In the  event  of  such
                           determination  or  determinations  by  the  Board  of
                           directors,  the Holders of Series B  Preferred  Stock
                           shall not be  entitled  to receive  dividends  during
                           such  period  of  time  or  times  as  the  Board  of
                           Directors may determine.

                                    (iii)  Notwithstanding  any  other  term  or
                           provision  contained  herein,  and  as  a  completely
                           separate and  independent  matter from the provisions
                           of  subparagraph  (ii) above,  the Board of Directors
                           shall, in its sole and absolute discretion,  have the
                           right  and  option,  but not the  obligation,  to pay
                           dividends  on the Series B Preferred  Stock either in
                           shares of Common  Stock or in cash for any  period or
                           periods of time, whether consecutive or not, such as,
                           for  example,  for an entire  year,  for a portion or
                           portions  of a  year,  for  multiple  years,  or  for
                           portions of multiple years. If the Board of Directors
                           determines  to pay dividends for any period in shares
                           of  Common  Stock,  the  value  of a share  shall  be
                           determined  by  averaging  the daily  closing  prices
                           (i.e.,  last sale price,  regular way) for a share of
                           Common Stock for the 10  consecutive  trading days on
                           which such shares are  actually  traded on the NASDAQ
                           National  Market  System  preceding  the  end  of the
                           period, if the Common Stock is so traded at the time.
                           If not,  the  average  of the high bid and low  asked
                           prices as reported in the Wall Street Journal,  or if
                           not  so  reported,  as  furnished  by a  professional
                           market  maker making a market in the Common Stock and
                           selected by the Board of Directors of, shall be used.

                           (c)  Liquidation  Preference.  On  any  voluntary  or
                           involuntary  liquidation  of  the  Corporation,   the
                           Holders of Series B Preferred  Stock shall  receive a
                           liquidation  preference  equal to $10.00  per  share,
                           plus any  declared  and unpaid  dividends on Series B
                           Preferred  Stock,  and no more,  before any amount is
                           paid to the holders of the Common Stock. or any other
                           series of  Preferred  Stock  junior  to the  Series B
                           Preferred Stock. Each certificate representing shares
                           of Series B  Preferred  Stock  shall show on its face
                           the amount of the  liquidation  preference per share.

                                       2

<PAGE>

                           If  the   assets   of  the   Corporation   should  be
                           insufficient  to permit  payment  to the  Holders  of
                           Series B  Preferred  Stock of their full  liquidation
                           preference  amounts  as  herein  provided,  then such
                           assets will be distributed  ratably among the holders
                           of outstanding shares of Series B Preferred Stock. If
                           the  assets  of the  Corporation  are  sufficient  to
                           permit  payment to the  Holders of Series B Preferred
                           Stock of their  liquidation  preference in full,  the
                           holders of any other series of Preferred Stock junior
                           to the Series B Preferred Stock and/or the holders of
                           Common Stock shall receive  ratably all the remaining
                           assets of the Corporation.  A merger or consolidation
                           of  the   Corporation   with   or  into   any   other
                           corporation, or a sale of all or substantially all of
                           the  assets  of the  Corporation  will  be  deemed  a
                           liquidation of the Corporation  within the meaning of
                           this  paragraph,  thereby  entitling  Holders  to the
                           liquidation preference.

         (d)      Conversion  Rights of  Holders.  The  Holder of any  shares of
                  Series B  Preferred  Stock  shall have the right and option to
                  convert any of such  shares of Series B  Preferred  Stock into
                  shares of Common Stock on the following terms:

                  (i)  Conversion  Rate.   Commencing   August  31,  1999,  each
                  outstanding  share  of  Series  B  Preferred  Stock  shall  be
                  convertible  at any time and from time to time,  at the option
                  of the  Holder,  into ten (10)  shares  of  Common  Stock  (as
                  constituted  after the  effectiveness  of a  1-for-10  reverse
                  stock split).

                  (ii)  Procedure.  Any Holder may convert by  delivering to the
                  office  of the  Corporation  or its  transfer  agent a written
                  notice  electing  to convert  and  surrendering  the  Holder's
                  certificate(s) being converted, duly endorsed for transfer.

         (e)      General Conversion Provisions.  The following provisions apply
                  to conversion:

                  (i)  Anti-dilution Rights.  While the Series B Preferred Stock
                  is  outstanding, if the Corporation:

                         (w) divides its outstanding shares of Common Stock into
                    a greater number of shares;

                         (x)  combines  its  outstanding  shares of Common Stock
                    into a small number of shares;

                         (y)  pays a  dividend  or makes a  distribution  on its
                    Common  Stock  in  shares  of its  capital  stock  or  other
                    property; or

                         (z) issues by  reclassification of its Common Stock any
                    shares of its capital stock or other property;

                  then the  conversion  privilege in effect  immediately  before
                  such  action  will be  adjusted so that the each Holder of the
                  Series B Preferred Stock thereafter  converted may receive the
                  number  of  shares of  Common  Stock,  capital  stock or other
                  property that he would have owned  immediately  following such
                  action if he had  converted  the shares of Series B  Preferred
                  Stock  immediately  before the record  date (or,  if no record
                  date, the effective date) for such action.

                  The adjustment  will become  effective  immediately  after the
                  record  date in the case of a  dividend  or  distribution  and
                  immediately  after  the  effective  date  in  the  case  of  a
                  subdivision, combination or reclassification.

                                       3

<PAGE>


                  (ii) No Fractional  Shares.  Neither  fractional  shares,  nor
                  scrip or other certificates evidencing such fractional shares,
                  will be issued by the  Corporation  on  conversion of Series B
                  Preferred  Stock, but the Corporation will pay in lieu thereof
                  the Determined  Value  (defined  below) in cash to the holders
                  who would be entitled to receive such fractional  shares.  The
                  "Determined Value" means the otherwise-issuable  fraction of a
                  share of Common Stock  multiplied  by the average of the daily
                  closing  prices  (i.e.,  last sale price,  regular  way) for a
                  share of Common Stock for the 10  consecutive  trading days on
                  which such shares are actually  traded on the NASDAQ  National
                  Market  System (if the Common  Stock is so traded at the time)
                  preceding  the date the Holder  delivered to the office of the
                  Corporation or its transfer agent a written notice electing to
                  convert   and   surrendering   the   Holder's   certificate(s)
                  evidencing  the  shares  of  Series B  Preferred  Stock  being
                  converted,  duly endorsed for transfer. If the Common Stock is
                  not so traded at the time, the average of the high bid and low
                  asked prices as reported in the Wall Street Journal, or if not
                  so  reported,  as  furnished  by a  professional  market maker
                  making a market in the Common  Stock and selected by the Board
                  of Directors of, shall be used.

                  (iii) Status of Converted Shares. Shares of Series B Preferred
                  Stock that are  converted  will be  restored  to the status of
                  authorized but unissued shares of Preferred Stock, and will no
                  longer be authorized but unissued shares of Series B Preferred
                  Stock.

                  (iv)Reservation  of Shares.  The Corporation will at all times
                  reserve and keep  available out of its authorized but unissued
                  shares of Common  Stock such number of shares of Common  Stock
                  as  may  be  necessary  for  the  purpose  of  converting  all
                  outstanding  shares of Series B Preferred  Stock into the full
                  number of shares of Common Stock  issuable upon  conversion of
                  all such Series B Preferred Stock.

         (f)       Redemption.  The  Corporation  may  redeem Series B Preferred
                   Stock under the following terms and conditions:

                  (i) Terms of Redemption.  On or after 5:00 p.m. Dallas,  Texas
                  time,  July 31, 2000, the  Corporation,  may, at the option of
                  the Board of Directors, redeem the whole, or from time to time
                  any  part,  of the  outstanding  Series B  Preferred  Stock by
                  paying in cash $10.00 per share,  plus all dividends  accrued,
                  unpaid, and accumulated thereon, as provided in this paragraph
                  through and including  the  redemption  date (the  "Redemption
                  Price")  and by  giving  to each  record  Holder  of  Series B
                  Preferred  Stock at his or her last known  address as shown on
                  the Corporation's  records,  at least thirty (30) but not more
                  than sixty (60)days' notice.  This "Redemption  Notice" may be
                  either in person or in writing,  by mail,  postage prepaid and
                  must  state the class or series or part of any class or series
                  of  shares  to be  redeemed,  along  with the date and plan of
                  redemption,  the  Redemption  Price,  and the place  where the
                  shareholders  may obtain  payment of the  Redemption  Price on
                  surrendering their share  certificates.  If only a part of the
                  outstanding  Series B Preferred Stock is redeemed,  redemption
                  will  be by  lot or  pro  rata,  as  the  Board  of  Directors
                  prescribes.  But no Series B  Preferred  Stock may be redeemed
                  unless  all  accrued   and   accumulated   dividends   on  all
                  outstanding  Series B  Preferred  Stock have been paid for all
                  past  dividend  periods  and full  dividends  for the  current
                  period  through and  including the  redemption  date have been
                  paid or declared  and set apart for  payment.  On or after the
                  date fixed for  redemption,  each Holder of shares  called for
                  redemption may, unless the Holder has previously exercised the
                  option to convert the  Holder's  Series B  Preferred  Stock as
                  provided  elsewhere  herein,  surrender to the Corporation the
                  certificate  for the  shares  at the place  designated  in the
                  Redemption Notice and will then be entitled to receive payment
                  of  the  Redemption  Price.  If  fewer  than  all  the  shares
                  represented by any surrendered certificate are redeemed, a new
                  certificate for the unredeemed  shares will be issued.  If the
                  Redemption  Notice  is duly  given  and  sufficient  funds are


                                       4

<PAGE>

                  available on the date fixed for redemption,  then,  whether or
                  not the  certificates  representing  the shares to be redeemed
                  are  surrendered,  all the Holders' rights with respect to the
                  shares called for redemption  will terminate on the date fixed
                  for  redemption,  except for the Holders' right to receive the
                  Redemption  Price,  without  interest,  on surrendering  their
                  certificates.

                  (ii) Deposit of Funds.  Shares are  considered  redeemed,  and
                  dividends  on them  cease to accrue  after the date  fixed for
                  redemption,  if, on or before any date fixed for redeeming the
                  Series B Preferred  Stock as provided in this  paragraph,  the
                  Corporation  deposits  as a trust  fund with any bank or trust
                  company in Oklahoma or Texas (or any bank or trust  company in
                  the  United   States   duly   appointed   and  acting  as  the
                  Corporation's  transfer agent) a sum sufficient to redeem,  on
                  the  date  fixed  for   redemption,   the  shares  called  for
                  redemption, with irrevocable instructions and authority to the
                  bank or trust company (a) to publish the Redemption Notice (or
                  to complete publication already begun), and (b) to pay, on and
                  after the date fixed for  redemption or before that date,  the
                  Redemption  Price of the  shares  to their  holders  when they
                  surrender  their  certificates.  The deposit is  considered to
                  constitute  full payment of the shares to their  holders,  and
                  from the date of the  deposit  the  shares  will no  longer be
                  considered  outstanding.  Moreover,  the Holders of the shares
                  will cease to be  shareholders  with  respect  to the  shares,
                  except to receive  from the bank or trust  company  payment of
                  the  Redemption  Price of the  shares  (without  interest)  on
                  surrendering of the  certificates and to convert the shares to
                  Common  Stock  as  provided  elsewhere  herein.  Any  money so
                  deposited  on  account  of the  Redemption  Price of  Series B
                  Preferred  Stock  shares  converted  after the deposit is made
                  must be repaid immediately to the corporation on conversion of
                  those shares of Series B Preferred Stock.

                  (iii) Status of Redeemed Shares.  Shares of Series B Preferred
                  Stock redeemed  by  the  Corporation shall  be restored to the
                  status of authorized but unissued shares.

          (i)     No  Preemptive  Rights.  Holders of  Series B Preferred  Stock
                  will not have  any  preemptive  rights  to  subscribe  for  or
                  purchase any  additional  shares  of  Preferred  Stock  of any
                  series or any shares of the Corporation's Common Stock.

          (j)     Restriction of Surplus.  The  liquidation  preference  of  the
                  Series B Preferred  Stock  exceeds  the par value  thereof  by
                  $9.99 per share. As long as any shares  of Series B  Preferred
                  Stock are  outstanding,  surplus  shall be restricted  on  any
                  specific date by an amount equal to  the  product of (i) $9.99
                  multiplied  by   (ii)  the   number  of  shares  of  Series  B
                  Preferred  Stock  then  outstanding.  In  furtherance  of this
                  restriction of surplus, the Corporation  covenants and  agrees
                  that, so long as any shares of  Series B Preferred  Stock  are
                  issued and  outstanding,  the Corporation  shall  not pay  any
                  dividend,  make any  other  distribution,  or  enter  into  or
                  consummate  any  transaction  which would have  the  effect of
                  reducing  the combined (i) par value of all shares  of  Series
                  B Preferred  Stock then  outstanding and (ii) surplus  of  the
                  Corporation to an amount less than  the aggregate  liquidation
                  preference  of all the  then-outstanding  shares  of  Series B
                  Preferred Stock."




                                       5





                                  Exhibit 10.13

                       AMENDMENT TO STOCK OPTION AGREEMENT

                                George C. Barker

         This Amendment to  Stock Option Agreement  is made as of the 4th day of
May, 1998, between Tatonka Energy, Inc., an Oklahoma corporation ("Company") and
George C. Barker, ("Optionee").

         WHEREAS,  on May 4, 1988,  the  Company  granted  Optionee an option to
purchase an aggregate of 5,000,000  shares of Company's  Common Stock, par value
of $0.001 (as presently  constituted),  on the terms and conditions  hereinafter
set forth,  at the purchase  price of $0.075 per share as presently  constituted
(500,000  shares at $0.75 per share,  after the  effectiveness  of the  proposed
1-for-10 reverse stock split); and

         WHEREAS,  the  option  was  contained  in  that  certain  Stock  Option
Agreement dated as of May 4, 1988; and

         WHEREAS,  the  Company  and the  Optionee  intended  that the option be
granted  at a price  equal to 100% of the  fair  market  value of the  Company's
Common Stock on the date of grant; and

         WHEREAS,  the  parties  believed  at the time that $0.075 per share (as
presently  constituted)  was the fair market  value of the Common  Stock on such
date,  but the parties have  subsequently  learned that the fair market value of
the Common Stock on such date was $0.13; and

         WHEREAS, the parties desire to amend the Stock Option Agreement,  as of
May 4, 1998, to correct this error;

         NOW, THEREFORE,  in consideration of the premises, the mutual covenants
hereinafter set forth,  and other good and valuable  consideration,  the Company
and Optionee agree as follows:

         1. The purchase price shall be $0.13 per share as presently constituted
($1.30 per share, after the effectiveness of the proposed 1-for-10 reverse stock
split).

         2. Except as amended by this Amendment, the terms and provisions of the
Stock Option  Agreement  shall be  unchanged  and shall remain in full force and
effect.

         IN WITNESS  WHEREOF,  the Company has caused  this  Amendment  to Stock
Option Agreement to be executed in its name by its President and attested by its
Secretary on the day and year first above written, and the Optionee has hereunto
set his hand and seal on the day and year specified below.

                                                TATONKA ENERGY, INC.

                                                By /s/ George C. Barker
                                                   ---------------------------
                                                   George C. Barker, President
ATTEST:

/s/ Judith F. Barker
- ---------------------------
Judith F. Barker, Secretary


                                               By /s/ George C. Barker
                                                  ---------------------------
                                                  George C. Barker, Optionee





                       AMENDMENT TO STOCK OPTION AGREEMENT

                                   Joe R. Love

         This Amendment to Stock Option Agreement is made as of the 4th day of
May, 1998, between Tatonka Energy, Inc., an Oklahoma corporation ("Company") and
Joe R. Love ("Optionee").

         WHEREAS, on May 4, 1988,  the Company  granted  Optionee  an option  to
purchase an aggregate of 2,500,000  shares of Company's  Common Stock, par value
of $0.001 (as presently  constituted),  on the terms and conditions  hereinafter
set forth,  at the purchase  price of $0.075 per share as presently  constituted
(250,000  shares at $0.75 per share,  after the  effectiveness  of the  proposed
1-for-10 reverse stock split); and

         WHEREAS,  the  option  was  contained  in  that  certain  Stock  Option
Agreement dated as of May 4, 1988; and

         WHEREAS,  the  Company  and the  Optionee  intended  that the option be
granted  at a price  equal to 100% of the  fair  market  value of the  Company's
Common Stock on the date of grant; and

         WHEREAS,  the  parties  believed  at the time that $0.075 per share (as
presently  constituted)  was the fair market  value of the Common  Stock on such
date,  but the parties have  subsequently  learned that the fair market value of
the Common Stock on such date was $0.13; and

         WHEREAS, the parties desire to amend the Stock Option Agreement,  as of
May 4, 1998, to correct this error;

         NOW, THEREFORE,  in consideration of the premises, the mutual covenants
hereinafter set forth,  and other good and valuable  consideration,  the Company
and Optionee agree as follows:

         1. The purchase price shall be $0.13 per share as presently constituted
($1.30 per share, after the effectiveness of the proposed 1-for-10 reverse stock
split).

         2. Except as amended by this Amendment, the terms and provisions of the
Stock Option  Agreement  shall be  unchanged  and shall remain in full force and
effect.

         IN WITNESS  WHEREOF,  the Company has caused  this  Amendment  to Stock
Option Agreement to be executed in its name by its President and attested by its
Secretary on the day and year first above written, and the Optionee has hereunto
set his hand and seal on the day and year specified below.

                                                TATONKA ENERGY, INC.


                                                By /s/ George C. Barker
                                                   ---------------------------
                                                   George C. Barker, President
ATTEST:

/s/ Judith F. Barker
- ---------------------------
Judith F. Barker, Secretary


                                               By /s/ George C. Barker
                                                  ---------------------------
                                                  George C. Barker, Optionee











                       AMENDMENT TO STOCK OPTION AGREEMENT

                                   Joe P. Foor

         This Amendment to Stock Option Agreement is made as of the 4th  day  of
May, 1998, between Tatonka Energy, Inc., an Oklahoma corporation ("Company") and
Joe P. Foor ("Optionee").

         WHEREAS,  on May 4, 1988,  the  Company  granted Optionee  an option to
purchase an aggregate of 2,500,000  shares of Company's  Common Stock, par value
of $0.001 (as presently  constituted),  on the terms and conditions  hereinafter
set forth,  at the purchase  price of $0.075 per share as presently  constituted
(250,000  shares at $0.75 per share,  after the  effectiveness  of the  proposed
1-for-10 reverse stock split); and

         WHEREAS,  the  option  was  contained  in  that  certain  Stock  Option
Agreement dated as of May 4, 1988; and

         WHEREAS,  the  Company  and the  Optionee  intended  that the option be
granted  at a price  equal to 100% of the  fair  market  value of the  Company's
Common Stock on the date of grant; and

         WHEREAS,  the  parties  believed  at the time that $0.075 per share (as
presently  constituted)  was the fair market  value of the Common  Stock on such
date,  but the parties have  subsequently  learned that the fair market value of
the Common Stock on such date was $0.13; and

         WHEREAS, the parties desire to amend the Stock Option Agreement,  as of
May 4, 1998, to correct this error;

         NOW, THEREFORE,  in consideration of the premises, the mutual covenants
hereinafter set forth,  and other good and valuable  consideration,  the Company
and Optionee agree as follows:

         1. The purchase price shall be $0.13 per share as presently constituted
($1.30 per share, after the effectiveness of the proposed 1-for-10 reverse stock
split).

         2. Except as amended by this Amendment, the terms and provisions of the
Stock Option  Agreement  shall be  unchanged  and shall remain in full force and
effect.

         IN WITNESS  WHEREOF,  the Company has caused  this  Amendment  to Stock
Option Agreement to be executed in its name by its President and attested by its
Secretary on the day and year first above written, and the Optionee has hereunto
set his hand and seal on the day and year specified below.

                                                TATONKA ENERGY, INC.

                                                By /s/ George C. Barker
                                                   ---------------------------
                                                   George C. Barker, President
ATTEST:

/s/ Judith F. Barker
- ---------------------------
Judith F. Barker, Secretary


                                               By /s/ George C. Barker
                                                  ---------------------------
                                                  George C. Barker, Optionee











- --------------------------------------------------------------------------------
                             MASTER LEASE AGREEMENT

- --------------------------------------------------------------------------------

                Master Lease Agreement No. 11053 ("MASTER LEASE")

LESSOR: PRIME LEASING, INC.,            LESSEE:  PHYMED Diagnostic Imaging
an Illinois corporation ("LESSOR")      Center  Hillcrest, Inc.,
10275 W. Higgins Road                   a Texas corporation ("LESSEE")
Rosemont, IL  60018                     12840 Hillcrest Road, Suite 100
847/294-6000                            Dallas, Texas 75230
                                        Phone:

WHEREAS,  LESSOR,  as the  foreclosing  secured  party under a Loan and Security
Agreement dated September 15, 1998,  between Lessor,  as secured party,  and The
Ranch  Imaging  Center,  L.C. and  Millennium  Diagnostic  Imaging,  L.L.C.,  as
debtors, conducted a public foreclosure sale of certain equipment. which is more
particularly  described in the Lease Schedule  attached hereto (the  "Foreclosed
Equipment");  WHEREAS,  LESSOR and LESEE  previously have entered into a Secured
Party's Temporary Master Lease Agreement (the "Temporary  Master Lease"),  dated
October __, 1999, whereby LESSOR leased to LESSEE such Foreclosed Equipment in a
limited  disposition  of the  Foreclosed  Equipment,  which was  conducted  as a
private sale/disposition of the Foreclosed Equipment pending the consummation of
a public sale of the Foreclosed Equipment; WHEREAS, LESSOR acquired title to the
Foreclosed Equipment at the public foreclosure sale; WHEREAS,  LESSOR desires to
lease the  Foreclosed  Equipment  to LESSEE and may lease  additional  equipment
(referred to as "Additional  Equipment") to Lessee in the future (the Foreclosed
Equipment and the Additional  Equipment  being referred to  collectively  as the
"Equipment");  WHEREAS,  LESSEE desires to lease the  Foreclosed  Equipment from
LESSOR  and may  lease  Additional  Equipment  from  Lessor in the  future;  and
WHEREAS, to facilitate the lease of the Foreclosed Equipment,  the parties agree
to enter into this MASTER LEASE and to  incorporate  by  reference  from time to
time in lease  schedules  (hereinafter  referred  to as "Lease  Schedules",  and
individually  as a "Lease  Schedule")  which will be attached  hereto and made a
part hereof, various units of Equipment; NOW, THEREFORE, in consideration of the
mutual promises contained herein and other good and valuable consideration,  the
parties hereto agree as follows:

         TERMS, CONDITIONS AND COVENANTS OF LEASE

1. LEASE:  This MASTER LEASE sets forth the terms and conditions by which LESSOR
agrees to lease to LESSEE and LESSEE  agrees to lease from LESSOR the  Equipment
as listed and described in each Lease Schedule  executed pursuant to this MASTER
LEASE.  Each Lease  Schedule shall be separate and distinct for all purposes and
shall incorporate  therein all the terms and conditions of this MASTER LEASE. If
there is a conflict  between the Lease Schedule and this MASTER LEASE, the terms
and conditions of this MASTER LEASE shall govern and control.

2.   TERM:
     ----
a. The term of this MASTER  LEASE shall begin on the date of execution by LESSOR
and shall continue in effect  thereafter  until all of LESSEE'S  obligations and
liabilities  under this MASTER  LEASE and every Lease  Schedule  have been fully
performed or otherwise discharged.

b. The lease term for each Lease  Schedule  shall commence on the earlier of the
Equipment  installation,  first  clinical use, or the cutover date  (hereinafter
referred to as "Commencement  Date").  If any Equipment under the Lease Schedule
is not newly installed,  then the Commencement Date shall be the date upon which
title to the Equipment  passes to LESSOR.  The lease term shall continue for the
number of months set forth in the Lease  Schedule  (hereinafter  referred  to as
"Initial Term") and continue for any extended or renewal term. The first payment
date of the  Initial  Term  shall  be the  first  day of the  month  immediately
following the Commencement  Date (or beginning on the Commencement  Date if that
date is on the first day of the month).

c. LESSEE shall  deliver to LESSOR a Certificate  of Acceptance  within five (5)
days of the  Commencement  Date. If Lessee fails to deliver the  Certificate  of
Acceptance,  LESSEE shall be deemed to have  accepted the Equipment as installed
and operational as of the  Commencement  Date unless LESSEE gives LESSOR written
notice of each defect within five (5) days of the Commencement Date.

<PAGE>


3. RENT AND PAYMENTS:  LESSEE'S obligation to pay rent under each Lease Schedule
shall begin on the Commencement Date and continue for the term. The monthly rent
(hereinafter  referred  to as  "Monthly  Rent") set forth in the Lease  Schedule
shall be due and  payable  in advance  on the first day of each  calendar  month
during the Initial Term without notice or demand  notwithstanding  the fact that
LESSOR may, as a convenience only, invoice LESSEE. If the Commencement Date of a
Lease Schedule shall be other than the first day of the month, LESSEE shall make
a rental payment (hereinafter  referred to as "Interim Rent") equal to 1/30th of
the Monthly Rent set forth in the Lease Schedule for each day beginning with the
Commencement  Date to and  including  the  last  day of the  month  prior to the
beginning of the Initial Term.  Any amounts  payable by LESSEE under this MASTER
LEASE  other  than the  Monthly  Rent and  Interim  Rent  shall be  deemed to be
additional rent (hereinafter referred to as "Additional Rent") and shall be paid
within twenty (20) days of invoicing by LESSOR.  Rent shall be paid to LESSOR at
the address  designated  herein or at such other place as LESSOR  designates  in
writing,  or if to an assignee of LESSOR,  at such place as such assignee  shall
designate  in  writing,  by  check  or wire  transfer  so  that  all  funds  are
immediately  available.  As used herein,  the term "rent" shall mean all Monthly
Rent, Interim Rent and Additional Rent. THIS IS A NON-CANCELABLE  LEASE.  LESSEE
shall pay the total  rents for the entire term to LESSOR,  or LESSOR'S  assignee
(as  defined  herein),   and  such  payment  of  rents  shall  be  absolute  and
unconditional  without  right to  setoff,  reduction,  abatement,  counterclaim,
recoupment, or defense of any kind whatsoever.

a. SERVICE  CHARGE:  In the event  that any rent is not  received  by  LESSOR or
LESSOR'S assignee within five (5) days of the due date thereof, LESSEE shall pay
a service  charge of five  percent  (5%) of the past due  payment  and shall pay
interest at the rate of 1.5 percent  (1.5%) per month or the maximum legal rate,
whichever is less, until all past due rents are received.

b. LEASE BASIS COST:  The term "Lease  Basis Cost" as used herein means the cost
of acquiring,  delivering and installing the Equipment including but not limited
to all parts, materials, labor, services,  transportation,  taxes, and all other
charges of every kind and nature associated therewith.

c. NON-PERFORMANCE: If LESSEE fails to perform any of its covenants, warranties,
terms or  conditions  herein,  LESSOR may,  at its  option,  perform on LESSEE'S
behalf  and all  monies  advanced  by  LESSOR  shall be  repayable  by LESSEE as
Additional Rent.  However,  in no event shall LESSOR'S  performance on behalf of
LESSEE be deemed to relieve LESSEE of its obligations hereunder.

4. LEGAL TITLE, LIENS, TAXES AND QUIET ENJOYMENT: During the term of this MASTER
LEASE, legal title to all Equipment shall at all times vest in LESSOR.  LESSEE'S
interest in the Equipment  shall be limited to its possession and use and LESSEE
shall  not have or  assert  any  right,  title or  interest  therein,  except as
expressly  set forth herein,  and shall  protect,  indemnify and defend,  at its
expense,  LESSOR'S legal title. LESSEE shall, at its expense, keep the Equipment
free and clear of any lien or encumbrance of any kind whatsoever  except that of
LESSOR arising  hereunder.  LESSEE warrants that the Equipment will at all times
remain  personal  property,  regardless  of how it may be  affixed  to any  real
property.  Prior to LESSOR'S  acceptance  of this  MASTER  LEASE,  LESSEE  shall
provide LESSOR with a waiver, in form satisfactory to LESSOR, by the landlord or
mortgagee of the premises in which the Equipment is located,  of such landlord's
or  mortgagee's  rights in and to the  Equipment  and/or the rent due under this
MASTER  LEASE.  In lieu of such  waiver,  LESSEE  hereby  agrees to hold  LESSOR
harmless  and  indemnify  LESSOR  with  regard to any and all  claims,  actions,
damages,  costs and attorneys fees asserted by any landlord or mortgagee against
LESSOR or the Equipment herein. LESSEE shall pay all taxes,  assessments or fees
assessed  against the  Equipment  or payable by LESSOR or LESSEE with respect to
the  Equipment,  including  any interest or penalties  therein,  excepting  only
federal or state taxes  based on the net income of LESSOR and without  regard to
LESSOR'S  agreement to invoice LESSEE for such amounts.  LESSEE  agrees,  to the
extent  permissible  by law,  to prepare and file all  required  tax returns and
other  reports  (other  than  reports  regarding  LESSOR'S  income tax) with any
federal,  state or other  regulatory  authority.  LESSEE further agrees,  to the
extent  permitted by law, to take such actions and to file such documents as may
be required to ensure that the valuation of the  Equipment,  as reflected on the
records and tax rolls of applicable taxing authorities, does not exceed the fair
market value of the  Equipment.  To the extent  LESSEE is not  permitted to file
such returns, reports, or documents,  LESSEE shall prepare them and provide them
to LESSOR  for  filing  prior to the date such  return or report is due.  LESSOR
shall have the right to affix a stencil,  plate,  label or other  indicia of its
ownership  to the  Equipment  and  LESSEE  shall  not  remove  or  conceal  such
identification.  LESSEE shall have the right to quiet enjoyment of the Equipment
during the term of the Lease Schedule, so long as no event of default (as herein
defined) occurs.

<PAGE>


5. LOCATION,  USE,  MODIFICATIONS  AND  ALTERATIONS:  LESSEE shall not  move, or
permit the movement of, the Equipment from the location (hereinafter referred to
as "Equipment  Location") specified in the Lease Schedule without LESSOR'S prior
written  consent.  LESSEE  shall not use,  or permit the use of,  the  Equipment
unless such use is consistent  with LESSEE'S  business,  by qualified  operators
under  LESSEE'S   control  and  in  compliance  with  (A)  applicable  laws  and
regulations;   (B)  the   specifications   of,  and  use  contemplated  by,  the
manufacturer of the Equipment  (hereinafter referred to as "Manufacturer");  (C)
the terms of LESSEE'S insurance  coverage;  and (D) the requirements of LESSEE'S
maintenance  agreement  regarding  the  Equipment.  LESSEE  shall  not  make any
modifications,  alterations or additions to the Equipment without LESSOR'S prior
written consent (other than Manufacturer's  Changes, as such term is hereinafter
defined)  unless said additions (A) are readily  removable  without  causing any
damage to the Equipment and (B) do not impair the quality,  safety,  function or
marketability  of  the  Equipment  (hereinafter  referred  to  as  a  "Permitted
Modification").  Any  Permitted  Modification  shall not become the  property of
LESSOR  and  shall not be  subject  to the Lease  Schedule,  provided  that upon
termination  or  expiration  of the term,  LESSEE  shall  remove  all  Permitted
Modifications and restore the Equipment to its original condition (ordinary wear
and tear  excepted),  all at no  expense  to  LESSOR.  LESSEE  shall  permit the
Manufacturer,  its agents or its  contractors,  access to the  Equipment for the
purpose of performing such upgrades, recall orders or engineering changes as the
Manufacturer  shall require to enhance or maintain the  Equipment's  standard of
performance  (herein defined as  "Manufacturer's  Changes"),  all of which shall
immediately become the property of LESSOR and be subject to the Lease Schedule.

6.  MAINTENANCE  AND INSPECTION:  THIS IS A NET LEASE.  LESSEE shall, at its own
expense,  maintain the  Equipment in good  condition  and repair and furnish all
necessary repairs,  parts,  materials and supplies.  At all times herein, LESSEE
shall  keep  in  full  force  and  effect  a  maintenance   agreement  with  the
Manufacturer or, with LESSOR'S consent,  with an equivalent service organization
that routinely maintains such Equipment  (hereinafter referred to as "Equivalent
Service Organization"). During reasonable business hours and subject to LESSEE'S
reasonable security precautions, LESSEE shall permit LESSOR access to all of the
Equipment  for the purpose of  inspecting  the  Equipment to determine  LESSEE'S
compliance  with this MASTER  LEASE.  If LESSEE is not in  compliance  with this
MASTER LEASE, LESSOR shall notify LESSEE in writing of the acts of noncompliance
and LESSEE shall  immediately cease using the Equipment until full compliance is
achieved.

7.  DISCLAIMER  OF  WARRANTIES:   LESSEE  has  selected  at  its  own  risk  the
Manufacturer,  size and design of the Equipment. LESSEE acknowledges that LESSOR
is not the Manufacturer,  or its agent or distributor,  and that LESSOR MAKES NO
REPRESENTATIONS  OR  WARRANTY  OF  ANY  KIND  WHATSOEVER,  EXPRESS  OR  IMPLIED,
INCLUDING BUT NOT LIMITED TO  REPRESENTATIONS  OR WARRANTIES WITH RESPECT TO THE
MERCHANTABILITY,   VALUE,  CONDITION,   QUALITY,  DESIGN,  CAPACITY,   MATERIAL,
WORKMANSHIP  OR  FITNESS OR  SUITABILITY  FOR ANY  PURPOSE OR USE BY LESSEE,  OR
PATENT,  COPYRIGHT  OR  TRADEMARK  INFRINGEMENT.  LESSOR SHALL NOT BE LIABLE FOR
LOSSES OR DAMAGES THEREFROM,  INCLUDING BUT NOT LIMITED TO LOSS OF BUSINESS,  OR
ACTUAL OR  ANTICIPATED  PROFITS,  OR OTHER DIRECT,  INCIDENTAL OR  CONSEQUENTIAL
DAMAGES OF ANY KIND WHATSOEVER  ARISING FROM THIS MASTER LEASE OR THE EQUIPMENT.
So long as no Event of Default (as herein  defined) has  occurred and  continues
uncured,   LESSOR   assigns   LESSEE  all  of   Manufacturer's   warranties  and
indemnifications,  to  the  extent  said  warranties  and  indemnifications  are
assignable.

8. RISK OF LOSS: LESSEE hereby assumes and shall bear the entire risk of changes
to, loss,  theft,  damage,  destruction or seizure  (hereinafter  referred to as
"Event of Loss") of the Equipment from every cause whatsoever.  No Event of Loss
shall  relieve  LESSEE of its  obligations  to pay rent or to perform  any other
obligation  under this  MASTER  LEASE.  If any of the  Equipment  is damaged and
repairable,  LESSEE shall promptly  notify LESSOR of the occurrence of the Event
of Loss and shall, at LESSEE'S  expense within thirty (30) days of such Event of
Loss,  cause  repairs to be made to the Equipment to restore it to the condition
required  pursuant  to Section 6 herein.  If the  Equipment  is  damaged  beyond
repair,  LESSEE shall  promptly  notify LESSOR of the occurrence of the Event of
Loss and shall,  at  LESSEE'S  expense  within  thirty (30) days of the Event of
Loss:  (A) replace the Equipment  with like equipment in good repair and working
order or (B) pay to LESSOR in cash the  following:  (1) the  greater  of (a) ten
percent (10%) of the Lease Basis Cost or (b) the actual fair market value of the
Equipment  calculated  as of the date of the Event of Loss;  and (2) all amounts
which have  accrued and have not been paid by LESSEE to LESSOR under this MASTER
LEASE  through the date of the Event of Loss;  and (3) the present  value of the
unpaid rent  discounted  at a rate of five percent (5%) for the remainder of the
Initial Term for each Lease  Schedule  covering the Equipment  (the total amount
described in (1), (2), and (3) above is hereinafter  collectively referred to as
"Casualty Value").

<PAGE>


9. INSURANCE:  LESSEE shall provide and maintain,  at its sole cost and expense:
(1) all risk property  insurance on the Equipment for its full replacement value
in an amount no less  than the  Casualty  Value,  and (2)  comprehensive  public
liability  and property  damage  insurance on the  Equipment in amounts not less
than  $1,000,000.00 per occurrence and  $3,000,000.00 in the aggregate,  with an
insurer  reasonably  acceptable to LESSOR  considering  the risks to be insured.
LESSEE shall provide LESSOR or its assigns (in a form acceptable to LESSOR) with
certificates of insurance and a loss payable  endorsement in favor of LESSOR and
its  assigns,  as loss payee for  property  damage  coverage  and as  additional
insured for public liability coverage.  If specifically  requested in writing by
LESSOR,  LESSEE  shall  provide a copy of the  insurance  policy under which the
certificates  are issued.  The  insurance  endorsement  shall  provide  that the
coverage  shall not be materially  altered or cancelled  unless thirty (30) days
prior  written  notice has been given to LESSOR  and its  assigns,  and that the
coverage afforded to LESSOR and its assigns, shall not be rescinded, impaired or
invalidated  by any act or omission of LESSEE.  LESSOR may apply proceeds of any
such insurance to any of LESSEE'S  obligations  hereunder,  but shall pay excess
proceeds,  if any, to LESSEE upon LESSEE'S full  satisfaction of its obligations
hereunder.

10.  GENERAL  INDEMNIFICATION:  Except  for  liability  arising  from the  gross
negligence  or willful  misconduct of LESSOR,  its  employees or agents,  LESSEE
hereby  agrees to  indemnify,  defend,  protect  and hold  LESSOR,  its  agents,
employees,  directors and assigns  harmless from and against any and all claims,
losses, damages. injuries, suits, demands or expenses, including but not limited
to attorney's fees and costs of whatever kind and nature,  arising in connection
with the  Equipment,  including  without  limitation  its  selection,  purchase,
installation,  use, deinstallation,  delivery,  return or manufacture (including
without  limitation  patent,  trademark  or other  infringement).  LESSEE  shall
promptly notify LESSOR or its assigns of any matter hereby indemnified against.

11.  RETURN  OF  EQUIPMENT:  Upon  the  expiration  of  any  Lease  Schedule  or
termination  for any other  cause,  LESSEE at is sole  cost and  expense,  shall
assemble, crate, insure and deliver all of the Equipment, and all of the service
records relating thereto,  subject to the Lease Schedule,  to LESSOR in the same
good condition and repair as when received,  ordinary wear and teat excepted, to
such reasonable destination within the continental United States as LESSOR shall
designate.  LESSEE  shall  immediately  prior  to the  return  of  each  unit of
Equipment,  provide LESSOR a letter from the  Manufacturer  certifying that each
unit of Equipment is in good working order, ordinary wear and tear excepted, and
is eligible  for a  maintenance  agreement  by the  Manufacturer  or  Equivalent
Service  Organization.  LESSEE  shall  provide  LESSOR with at least one hundred
twenty (120) days written notice of the return of the Equipment. Notwithstanding
any other rights and remedies of LESSOR, if LESSEE fails to return the Equipment
to LESSOR or its designee within ten (10) days of the time required,  then until
such time as the Equipment is returned, LESSEE shall pay on demand as liquidated
damages,  not as a penalty,  and at LESSOR'S  election,  an amount  equal to (A)
twelve (12) months rent; or (B) one hundred twenty percent (120%) of the Monthly
Rent for each month or portion thereof until the Equipment is returned to LESSOR
as detailed herein.

12. LESSEE'S  REPRESENTATIONS AND WARRANTIES:  LESSEE represents and warrants to
LESSOR with regard to this MASTER  LEASE and each Lease  Schedule to be appended
hereto that:

a. The  execution,  delivery and  performance of this MASTER LEASE and any Lease
Schedule  have  been  duly  authorized  by all  necessary  action on the part of
LESSEE,  and this MASTER LEASE  constitutes  a valid and binding  obligation  of
LESSEE enforceable against LESSEE in accordance with its terms;

b. The  individual  executing  this  MASTER  LEASE on  behalf  of LESSEE is duly
authorized;

c.  Neither the  execution or delivery by LESSEE of this MASTER  LEASE,  nor the
performance  thereof  by  LESSEE,  conflicts  with,  results  in a breach  of or
constitutes  a default or violation of LESSEE'S  Certificate  of  Incorporation,
By-Laws,  applicable  law,  court order or any agreement or other  instrument to
which LESSEE is a party or by which it is bound;

d. LESSEE is duly organized and in good standing in its state of  incorporation,
is duly  qualified to do business in each  jurisdiction  where the  Equipment is
located and where such qualification is required;


<PAGE>

e. Upon request by LESSOR,  LESSEE shall furnish its most recent  audited annual
financial  statements  prepared in accordance with generally accepted accounting
principles;  and LESSEE shall furnish its quarterly financial  statements within
___ days after the end of each quarter,  prepared in accordance  with  generally
accepted  accounting  principles,  and being certified as true and correct by an
authorized officer of LESSEE;

f. LESSEE shall provide to LESSOR any other  documents  reasonably  requested to
consummate  this  transaction  or any Lease  Schedule or as reasonably  required
under this MASTER LEASE;

g. No  approval,  consent or  authorization  is required  from any  governmental
authority with respect to the execution,  delivery or performance of this MASTER
LEASE, or if any such approval,  consent or  authorization  is required,  it has
been obtained.

13.  EVENT OF DEFAULT:  The  occurrence  of any of the  following  events  shall
constitute an event of default by LESSEE or its guarantor  (hereinafter referred
to as an "Event of Default"):

a. Failure to pay when due any  installment  of rent or other sum due hereunder,
and such failure shall continue for more than five (5) days; or

b. Failure to perform any other term or condition,  covenant,  representation or
warranty of this MASTER LEASE or any Lease Schedule,  and such failure continues
for a period of twenty (20) days after notice thereof; or

c. If LESSEE or its guarantor ceases doing business as a going concern,  becomes
insolvent,  admits in writing its inability to pay its debts as they become due,
makes an assignment for the benefit of its creditors, files a voluntary petition
or answer seeking any reorganization,  arrangement,  composition,  readjustment,
liquidation,  dissolution  or similar relief under any present or future federal
or state statute,  law or regulation,  admits,  consents to or acquiesces in the
appointment  of a receiver or trustee of any of its property,  the commission of
any act of  dissolution,  liquidation or the bankruptcy or death of the LESSEE'S
guarantor in the event that the Guarantor is a natural person; or

d.  Failure  within  sixty (60) days after the  commencement  of any  proceeding
against  LESSEE  or  its  guarantor  seeking  any  reorganization,  arrangement,
composition,  readjustment,  liquidation,  dissolution,  bankruptcy  or  similar
relief under any current or future federal or state  statute,  law or regulation
to obtain the dismissal of such proceeding; or

e. If any  warranty,  covenant  or  representation  made by  LESSEE to LESSOR is
false,  incorrect or untrue in any material respect; or if any Equipment subject
to a Lease Schedule is attached, levied upon, encumbered,  pledged or seized; or
LESSEE  defaults under any other  agreement  with LESSOR;  or defaults under any
other material lease, loan or agreement for the borrowing of money; or

f. There is a material  adverse  change in the financial  condition of LESSEE or
its guarantor.

14. REMEDIES: At any time after an Event of Default, LESSOR shall have the right
to exercise any one or more of the following cumulative remedies:

a. Accelerate without notice to LESSEE all of LESSEE'S obligations hereunder and
to sue for and recover all rents and other  amounts  which have accrued or shall
accrue under this MASTER LEASE,  all of which shall become  immediately  due and
payable upon demand by LESSOR;

b.  Require  that  LESSEE  assemble  the  Equipment  and deliver it to LESSOR as
provided  under Section 11 or enter the premises  where any Equipment is located
without  notice or process of law and take  possession of the Equipment  without
incurring  any  liability  to LESSEE or any other party for any damages  arising
from such taking of possession;

c.   Sell any or all of the Equipment at public or private sale or relet same;

d.  Terminate  this MASTER  LEASE or any Lease  Schedule as to any or all of the
Equipment; and

e. At law or in  equity,  enforce  any of  LESSOR'S  rights or pursue  any other
remedy now or hereafter arising.


<PAGE>

LESSOR'S  remedies  hereunder are cumulative in nature,  not exclusive,  and the
exercise of any  particular  remedy  shall not be construed to be an election of
remedies  by LESSOR nor shall any waiver or delay by LESSOR of any of its rights
or remedies under this MASTER LEASE be construed as a waiver of LESSOR'S  rights
to enforce  that, or any other,  right or remedy in the future.  Notwithstanding
LESSOR'S election of remedies,  LESSEE shall remain liable for the present value
of all rents  discounted  at a rate of five percent (5%) and other amounts which
have accrued or would have accrued  during the Initial  Term, in addition to (A)
all of LESSOR'S costs and expenses  incurred in enforcing its rights  hereunder,
or in taking  of  possession,  storing,  repairing,  selling  or  reletting  the
Equipment,  (B) court costs and  reasonable  attorney's  fees, and (C) an amount
equal to the greater of (1) ten percent (10%) of the Lease Basis Cost or (2) the
fair market value  calculated as of the date of such Event of Default,  less (D)
the net  proceeds  of a public or  private  sale or  reletting,  if any,  of the
Equipment,  at the present  value,  if  necessary,  discounted at a rate of five
percent (5%) and (E) any insurance  proceeds  recovered by LESSOR from insurance
coverage  provided by LESSEE.  However,  in no event shall LESSOR'S  exercise of
more than one of its remedies entitle LESSOR to recover from LESSEE an amount in
excess of that referred to in this section.

15.  ASSIGNMENT AND SUBLEASE:

a. LESSOR'S  ASSIGNMENT:  LESSEE  understands and  acknowledges  that LESSOR has
entered  into this  MASTER  LEASE and shall  enter into each Lease  Schedule  in
anticipation of assigning,  mortgaging, or otherwise transferring its rights and
interests thereunder and/or in the Equipment (but not its obligations) to others
(hereinafter  referred to as  "Assignees")  without  notice to or the consent of
LESSEE. Accordingly, LESSOR and LESSEE agree that:

(1)  LESSEE  will,  after due  notice,  acknowledge  in writing  such  notice of
assignment as reasonably  requested by LESSOR or its Assignee,  and pay directly
to the  designated  Assignee the amounts  which  become due under each  assigned
Lease  Schedule and such payment  shall be absolute and  unconditional,  without
reduction,  abatement,  offset or counterclaim of any kind.  Notwithstanding the
foregoing,  LESSEE reserves its rights to have recourse  directly against LESSOR
on account of any claim it may have against LESSOR.

(2) Any Assignee may reassign its rights and interests  hereunder  with the same
effect as the original assignment.

(3) LESSEE agrees to execute all filings pursuant to the Uniform Commercial Code
as well as any other documents  reasonably  requested by LESSOR or its Assignee.
Any  Assignee  shall  not be  liable to  LESSEE  for any  obligations  of LESSOR
hereunder.

b. LESSEE'S  ASSIGNMENT AND SUBLEASE:  Without  LESSOR'S prior written  consent,
LESSEE shall not: (A) assign any of its  obligations  hereunder,  (B) attempt to
sublease the Equipment or (C) attempt to sell,  transfer,  hypothecate,  dispose
of, lend or abandon the Equipment or any of LESSEE'S rights in it.

16.  CHOICE OF LAW AND FORUM:  This MASTER  LEASE and the  provisions  contained
herein  shall be deemed to have been  executed  at LESSOR'S  principal  place of
business in Rosemont, Illinois and shall be governed in all respects by the laws
of the State of Illinois.  LESSOR and LESSEE on behalf of  themselves  and their
assignees  further agree that courts located in the State of Illinois shall have
jurisdiction over any matters arising out of this MASTER LEASE and hereby submit
themselves to the personal jurisdiction of the Illinois courts.

17. NOTICES:  All notices or demands provided for herein shall be in writing and
shall be deemed given when  delivered  or  deposited in the United  States mail,
first  class,  postage  prepaid,  addressed  to the parties at their  respective
addresses set forth above, or at such other address as may be provided from time
to time.

18.  SURVIVAL OF  OBLIGATIONS:  All the terms and  conditions,  representations,
covenants,  warranties and agreements  contained in this MASTER LEASE and in any
Lease  Schedule or in any document in  connection  herewith  shall  specifically
survive the expiration or termination of this MASTER LEASE.

19. SEVERABILITY:  To the extent any provision of this MASTER LEASE or any Lease
Schedule is deemed partially or wholly invalid or unenforceable under applicable
law, such provision shall be effective to the extent valid and enforceable,  and
all other provisions shall remain in full force and effect.

20.  LESSOR'S  CONSENT:  When LESSOR'S  consent is required by the terms of this
MASTER LEASE, such consent shall not be unreasonably withheld.


<PAGE>

21. LEASE  SCHEDULE  REAFFIRMATION:  The  execution by LESSOR and LESSEE of each
Lease  Schedule  shall  constitute a  reaffirmation  by LESSEE of its covenants,
representations  and warranties  herein and that the same are true,  correct and
complete with respect to the Lease  Schedule as of the date of execution of each
Lease Schedule.

22.  HEADINGS:  All section  headings of this MASTER  LEASE are for  convenience
only,  and shall not in any way limit or  affect  the  meaning  or scope of this
MASTER LEASE or its provisions.

23. NO  WAIVER:  No delay,  omission  or failure to act by LESSOR at any time to
exercise or enforce any right or remedy herein provided shall be a waiver of any
such right or remedy to which LESSOR is entitled, nor shall it in any way affect
the right of LESSOR to enforce such provisions thereafter.

24. ENTIRE AGREEMENT:  This MASTER LEASE constitutes the entire agreement of the
parties hereto and no other written or oral  representations or warranties shall
be binding upon the parties hereto.  NO AGENT OR EMPLOYEE OF THE MANUFACTURER OR
SELLER OF THE EQUIPMENT IS AUTHORIZED TO BIND LESSOR TO THIS MASTER LEASE OR ANY
OTHER  AGREEMENT  OR TO  WAIVE  OR  MODIFY  ANY OF THE  PROVISIONS  HEREOF.  Any
modification  or waiver of any of the provisions  herein shall be effective only
if in writing and executed by all of the parties hereto,  provided  however that
LESSOR may add applicable  Equipment serial or  identification  numbers to Lease
Schedules and financing statements.

25.  SUCCESSOR:  This MASTER LEASE and each Lease Schedule shall be binding upon
and  shall  inure  to  the  benefit  of  LESSOR,  LESSEE  and  their  respective
successors, legal representatives and assigns.

26.  ADDITIONAL  FILINGS:  In the event that LESSEE  fails or refuses to execute
and/or file Uniform Commercial Code financing statements or other instruments or
recordings  which LESSOR or its Assignee  reasonably deems necessary to perfect,
or maintain  perfection  of,  LESSOR'S or its  Assignee's  interests  hereunder,
LESSEE   hereby   appoints   LESSOR  or  its   Assignee  as   LESSEE'S   limited
attorney-in-fact  to execute and record all  documents  reasonably  necessary to
perfect or maintain the perfection of LESSOR'S interest hereunder.  LESSEE shall
pay  LESSOR  or its  Assignee  for any costs and fees  relating  to the  filings
including,  but not limited to, costs,  fees,  searches,  document  preparation,
documentary stamps, privilege taxes and reasonable attorneys' fees.

27. MULTIPLE LESSEES: If more than one LESSEE is named within this MASTER LEASE,
the liability of each shall be joint and several.


28. LEASE  ACCEPTANCE:  At no time shall this MASTER LEASE or the Lease Schedule
be deemed to  constitute  an offer  binding  upon LESSOR until it is accepted by
execution of LESSOR at its corporate office in Rosemont, Illinois.




PRIME LEASING, INC.,                            PHYMED Diagnostic Imaging Center
              LESSOR                             Hillcrest, Inc.,
                                                           LESSEE

By:                                             By:
   -----------------------------------              ----------------------------

Name (Printed):                                 Name (Printed):
               -----------------------                          ----------------

Title:                                          Title:
      --------------------------------                 -------------------------

Date: October ____, 1999                        Date:  October ____, 1999












                                 LEASE SCHEDULE

LEASE SCHEDULE NUMBER 1     TO MASTER LEASE AGREEMENT NUMBER 11053
                                                             -----

This Lease  Schedule  incorporates  the terms and conditions of a certain Master
Lease Agreement,  dated as of the ____ day of October, 1999 (the "Master Lease")
by and between  PRIME  LEASING,  INC.,  O'Hare  International  Center,  10275 W.
Higgins Road,  Rosemont,  Illinois 60018 (the "Lessor"),  and PHYMED  Diagnostic
Imaging Center Hillcrest,  Inc., 12840 Hillcrest Road, Suite 100, Dallas,  Texas
75230 (the "Lessee").

THIS IS A NON-CANCELABLE LEASE SCHEDULE.

1.   Initial  Term:  48  months  commencing  with  the  first  day of the  month
     immediately   following  the  Commencement  Date  (or  beginning  with  the
     Commencement Date if that date is the first day of the month.)

2.   Rental Payments: $33,333 per month, plus any and all applicable taxes.

     Advance Payments receivable by Lessor as of the Commencement Date: $33,333.
     This Advance Payment is made by transfer and credit of the Advance Payments
     in the amount of $66,666  made by Lessee under the  Temporary  Master Lease
     Agreement  dated  September ___, 1999,  $33,333 of which was applied to the
     first month's rent payable under the Temporary Master Lease Agreement,  and
     the remaining  $33,333 of which is credited and  transferred as the Deposit
     under the Master Lease.

3.   Deposit.  LESSEE previously delivered to LESSOR on the Commencement Date of
     the  Temporary  Master  Lease the sum of  Sixty-Six  Thousand  Six  Hundred
     Sixty-Six and No/100 Dollars ($66,666) in immediately  available funds (the
     "Deposit").  The  Deposit  shall  continue  to be held by  LESSOR,  without
     liability   for   interest,   as  the  Deposit  under  this  Master  Lease.
     Thirty-Three   Thousand  Three  Hundred  Thirty-Three  and  No/100  Dollars
     ($33,333)  of the Deposit was applied by LESSOR  towards the payment of the
     first  full  month  of rent due  under  the  Temporary  Master  Lease;  the
     remainder may be applied by LESSOR,  at LESSOR'S sole option,  for any past
     due amount due under this Master  Lease.  If LESSEE is not in default under
     the terms of this Master  Lease,  any portion of the Deposit not applied by
     LESSOR as payment of rent or any past due amount  under this Master  Lease,
     shall be  distributed by LESSOR as follows;  first,  towards the payment of
     the rent due on the last  month of this  Master  Lease;  and  second  after
     termination  of this Master Lease and  contingent on LESSEE  complying with
     all of the terms of this Master Lease, any remaining amount to LESSEE.

4.   Conditions  Precedent.  LESSOR'S  obligations under this Lease Schedule are
     subject to the following conditions precedent:

     a.   LESSEE shall have leased that certain real  property and  improvements
          ("Premises")  located at 12840  Hillcrest  Road,  Suite  100,  Dallas,
          Dallas County, Texas;

     b.   LESSOR  shall  have  received  approval  for this  Master  Lease  from
          LESSOR'S Executive Committee;

     c.   LESSOR  shall have  received  the  Guaranty  (as defined in Section 8,
          below);

     d.   Lessor shall have  received a  landlord's  waiver from the landlord of
          the  Premises,  in form  satisfactory  to LESSOR,  waiving  landlord's
          rights in and to the Equipment; and

                                       2

<PAGE>


     e.   LESSOR shall have  received any other  document  reasonably  requested
          from LESSEE by LESSOR.

5.   Equipment: See Equipment Schedule attached hereto and made a part hereof.

6.   Commencement  Date:  October ___, 1999, as evidenced by the  Certificate of
     Acceptance, issued in respect to this Lease Schedule.

7.   End of Lease Options: At the end of the Initial Term, Lessee has the option
     to: (A)  purchase  all,  but not less than all,  of the  Equipment  at Fair
     Market Value, as described in the Master Lease; (B) renew the lease of all,
     but not less than all, of the Equipment at a Monthly Rent based on the then
     Fair Market  Value of the  Equipment;  or (C) return all, but not less than
     all, of the Equipment, subject to the terms and conditions as stipulated in
     the Master Lease.

8.   Guaranty.  By its  signature  below,  PHYMED,  INC.,  a  Texas  corporation
     ("PARENT"),  agrees that it will  execute a Guaranty,  dated as of the date
     hereof, that is acceptable to LESSOR, at LESSOR'S sole discretion,  whereby
     PARENT will guarantee to LESSOR,  the due,  regular and punctual payment of
     all of LESSEE'S obligations herein, including all rents due herein.

9.   Entire Agreement:  LESSEE REPRESENTS THAT IT HAS READ, RECEIVED, RETAINED A
     COPY OF AND  UNDERSTANDS  THIS LEASE SCHEDULE AND AGREES TO BE BOUND BY ITS
     TERMS AND CONDITIONS. LESSOR AND LESSEE AGREE THAT THIS LEASE SCHEDULE, THE
     MASTER LEASE AND ALL RIDERS THERETO SHALL  CONSTITUTE THE ENTIRE  AGREEMENT
     AND SUPERSEDE ALL PROPOSALS,  ORAL OR WRITTEN,  ALL PRIOR  NEGOTIATIONS AND
     ALL OTHER COMMUNICATIONS BETWEEN LESSOR AND LESSEE WITH RESPECT TO ANY UNIT
     OF EQUIPMENT.

THIS LEASE SCHEDULE IS EFFECTIVE ONLY UPON ACCEPTANCE BY LESSOR AT ITS CORPORATE
OFFICE IN ROSEMONT, ILLINOIS.

Accepted on October ___, 1999, at Rosemont, Illinois.


PRIME LEASING, INC.                        PHYMED Diagnostic Imaging Center
(Lessor)                                     Hillcrest, Inc. (Lessee)


By:________________________________        By:__________________________________

Name (Printed):____________________        Name (Printed):______________________

Title:_____________________________        Title:_______________________________

                                           Date: October ___, 1999

PHYMED, INC.,
(Parent)



By:________________________________

Name (Printed):____________________

Title:_____________________________

Date: October ___, 1999





                                       3

<PAGE>





                               EQUIPMENT SCHEDULE

                                       TO

                             LEASE SCHEDULE NUMBER 1

                                       TO

                      MASTER LEASE AGREEMENT NUMBER _______

Quantity          Description of Equipment                         Serial Number
- --------          ------------------------                         -------------

1                 MRI Phillips Gyro Scan NT 1.5                    126285-1

1                 G.E. R&F MS 1850                                 13562WK4

1                 Mammography-Bennett Contour                      BMC29289

1                 Ultrasound-ATL Ultramark HDI                     001JQ5

1                 C/Arm OEC DXR5                                   05X6015

1                 Dryview 8700 Laser Imager                        8702003

1                 CT-Picker 171950 PQ2000 Spiral CT Scanner        4038




EQUIPMENT LOCATION:  12840 Hillcrest Road, Suite 100, Dallas, Texas 75230













                               AMENDMENT NUMBER 01

                            TO LEASE SCHEDULE NO. 01

TO MASTER LEASE AGREEMENT NO. 11053



That  certain  Lease  Schedule  No. 01 dated  October 15,  1999 to Master  Lease
Agreement No. 11053 between PHYMED Diagnostic Imaging Center Hillcrest,  Inc. as
Lessee  and Prime  Leasing,  Inc.  as  Lessor,  and all  supplemental  documents
thereto,  notwithstanding  anything to the contrary set forth  therein is hereby
amended and it is expressly agreed to as follows:


Section 1, Initial Term is hereby amended to read as follows:

1.  Initial  Term:  49  months,  commencing  with  the  first  day of the  month
immediately  following the  Commencement  Date of the Secured Party's  Temporary
Master Lease Agreement (the "Temporary Master Lease") between Lessee and Lessor,
dated October 15, 1999.


Section 2, Rental Payments is hereby amended to read as follows:

2. Rental Payments:  $33,333 for the first and second month, $0.00 for the third
month  and  $34,656.00  for  month  four  through  forty-nine,  plus any and all
applicable taxes.







Except as expressly set forth  herein,  the Lease  Schedule  shall not otherwise
have been modified or amended hereby.

Accepted and Agreed to:                      Accepted and Agreed to:

Prime Leasing, Inc.                          PHYMED Diagnostic Imaging Center
 (Lessor)                                    Hillcrest, Inc.
                                              (Lessee)

BY:                                          BY:
   ------------------------------------         --------------------------------

NAME:(Printed)                               NAME:(Printed)
               ------------------------                     --------------------

TITLE:                                       TITLE:
      ---------------------------------            -----------------------------

DATE:                                        DATE:
      ---------------------------------            -----------------------------






- --------------------------------------------------------------------------------
                             MASTER LEASE AGREEMENT

- --------------------------------------------------------------------------------

                Master Lease Agreement No. 11150 ("MASTER LEASE")

LESSOR: PRIME LEASING, INC.,             LESSEE: Phymed Diagnostic Imaging
                                         Center-White Rock, Inc.
an Illinois corporation ("LESSOR")       an Texas Limited Partnership ("LESSEE")
10275 W. Higgins Road                    9603 White Rock Trail
Rosemont, IL  60018                      Dallas, TX   75238
847/294-6000                             Phone:


WHEREAS,  LESSOR desires to lease certain equipment  ("Equipment") to LESSEE and
may lease additional equipment (referred to as "Additional Equipment") to Lessee
in the future (the  Equipment and the  Additional  Equipment  being  referred to
collectively  as the  "Equipment");  WHEREAS,  LESSEE  desires to lease  certain
Equipment  from  LESSOR and may lease  Additional  Equipment  from Lessor in the
future; and WHEREAS, to facilitate the lease of the Equipment, the parties agree
to enter into this MASTER LEASE and to  incorporate  by  reference  from time to
time in lease  schedules  (hereinafter  referred  to as "Lease  Schedules",  and
individually  as a "Lease  Schedule")  which will be attached  hereto and made a
part hereof, various units of Equipment; NOW, THEREFORE, in consideration of the
mutual promises contained herein and other good and valuable consideration,  the
parties hereto agree as follows:

         TERMS, CONDITIONS AND COVENANTS OF LEASE

1. LEASE:  This MASTER LEASE sets forth the terms and conditions by which LESSOR
agrees to lease to LESSEE and LESSEE  agrees to lease from LESSOR the  Equipment
as listed and described in each Lease Schedule  executed pursuant to this MASTER
LEASE.  Each Lease  Schedule shall be separate and distinct for all purposes and
shall incorporate  therein all the terms and conditions of this MASTER LEASE. If
there is a conflict  between the Lease Schedule and this MASTER LEASE, the terms
and conditions of this MASTER LEASE shall govern and control.

2.   TERM:

a. The term of this MASTER  LEASE shall begin on the date of execution by LESSOR
and shall continue in effect  thereafter  until all of LESSEE'S  obligations and
liabilities  under this MASTER  LEASE and every Lease  Schedule  have been fully
performed or otherwise discharged.

b. The lease term for each Lease  Schedule  shall commence on the earlier of the
Equipment  installation,  first  clinical use, or the cutover date  (hereinafter
referred to as "Commencement  Date").  If any Equipment under the Lease Schedule
is not newly installed,  then the Commencement Date shall be the date upon which
title to the Equipment  passes to LESSOR.  The lease term shall continue for the
number of months set forth in the Lease  Schedule  (hereinafter  referred  to as
"Initial Term") and continue for any extended or renewal term. The first payment
date of the  Initial  Term  shall  be the  first  day of the  month  immediately
following the Commencement  Date (or beginning on the Commencement  Date if that
date is on the first day of the month).

d. LESSEE shall  deliver to LESSOR a Certificate  of Acceptance  within five (5)
days of the  Commencement  Date. If Lessee fails to deliver the  Certificate  of
Acceptance,  LESSEE shall be deemed to have  accepted the Equipment as installed
and operational as of the  Commencement  Date unless LESSEE gives LESSOR written
notice of each defect within five (5) days of the Commencement Date.

3. RENT AND PAYMENTS:  LESSEE'S obligation to pay rent under each Lease Schedule
shall begin on the Commencement Date and continue for the term. The monthly rent
(hereinafter  referred  to as  "Monthly  Rent") set forth in the Lease  Schedule
shall be due and  payable  in advance  on the first day of each  calendar  month
during the Initial Term without notice or demand  notwithstanding  the fact that
LESSOR may, as a convenience only, invoice LESSEE. If the Commencement Date of a
Lease Schedule shall be other than the first day of the month, LESSEE shall make
a rental payment (hereinafter  referred to as "Interim Rent") equal to 1/30th of
the Monthly Rent set forth in the Lease Schedule for each day beginning with the
Commencement  Date to and  including  the  last  day of the  month  prior to the
beginning of the Initial Term.  Any amounts  payable by LESSEE under this MASTER


<PAGE>

LEASE  other  than the  Monthly  Rent and  Interim  Rent  shall be  deemed to be
additional rent (hereinafter referred to as "Additional Rent") and shall be paid
within twenty (20) days of invoicing by LESSOR.  Rent shall be paid to LESSOR at
the address  designated  herein or at such other place as LESSOR  designates  in
writing,  or if to an assignee of LESSOR,  at such place as such assignee  shall
designate  in  writing,  by  check  or wire  transfer  so  that  all  funds  are
immediately  available.  As used herein,  the term "rent" shall mean all Monthly
Rent, Interim Rent and Additional Rent. THIS IS A NON-CANCELABLE  LEASE.  LESSEE
shall pay the total  rents for the entire term to LESSOR,  or LESSOR'S  assignee
(as  defined  herein),   and  such  payment  of  rents  shall  be  absolute  and
unconditional  without  right to  setoff,  reduction,  abatement,  counterclaim,
recoupment, or defense of any kind whatsoever.

a.  SERVICE  CHARGE:  In the event  that any rent is not  received  by LESSOR or
LESSOR'S assignee within five (5) days of the due date thereof, LESSEE shall pay
a service  charge of five  percent  (5%) of the past due  payment  and shall pay
interest at the rate of 1.5 percent  (1.5%) per month or the maximum legal rate,
whichever is less, until all past due rents are received.

b. LEASE BASIS COST:  The term "Lease  Basis Cost" as used herein means the cost
of acquiring,  delivering and installing the Equipment including but not limited
to all parts, materials, labor, services,  transportation,  taxes, and all other
charges of every kind and nature associated therewith.

c. NON-PERFORMANCE: If LESSEE fails to perform any of its covenants, warranties,
terms or  conditions  herein,  LESSOR may,  at its  option,  perform on LESSEE'S
behalf  and all  monies  advanced  by  LESSOR  shall be  repayable  by LESSEE as
Additional Rent.  However,  in no event shall LESSOR'S  performance on behalf of
LESSEE be deemed to relieve LESSEE of its obligations hereunder.

4. LEGAL TITLE, LIENS, TAXES AND QUIET ENJOYMENT: During the term of this MASTER
LEASE, legal title to all Equipment shall at all times vest in LESSOR.  LESSEE'S
interest in the Equipment  shall be limited to its possession and use and LESSEE
shall  not have or  assert  any  right,  title or  interest  therein,  except as
expressly  set forth herein,  and shall  protect,  indemnify and defend,  at its
expense,  LESSOR'S legal title. LESSEE shall, at its expense, keep the Equipment
free and clear of any lien or encumbrance of any kind whatsoever  except that of
LESSOR arising  hereunder.  LESSEE warrants that the Equipment will at all times
remain  personal  property,  regardless  of how it may be  affixed  to any  real
property.  Prior to LESSOR'S  acceptance  of this  MASTER  LEASE,  LESSEE  shall
provide LESSOR with a waiver, in form satisfactory to LESSOR, by the landlord or
mortgagee of the premises in which the Equipment is located,  of such landlord's
or  mortgagee's  rights in and to the  Equipment  and/or the rent due under this
MASTER  LEASE.  In lieu of such  waiver,  LESSEE  hereby  agrees to hold  LESSOR
harmless  and  indemnify  LESSOR  with  regard to any and all  claims,  actions,
damages,  costs and attorneys fees asserted by any landlord or mortgagee against
LESSOR or the Equipment herein. LESSEE shall pay all taxes,  assessments or fees
assessed  against the  Equipment  or payable by LESSOR or LESSEE with respect to
the  Equipment,  including  any interest or penalties  therein,  excepting  only
federal or state taxes  based on the net income of LESSOR and without  regard to
LESSOR'S  agreement to invoice LESSEE for such amounts.  LESSEE  agrees,  to the
extent  permissible  by law,  to prepare and file all  required  tax returns and
other  reports  (other  than  reports  regarding  LESSOR'S  income tax) with any
federal,  state or other  regulatory  authority.  LESSEE further agrees,  to the
extent  permitted by law, to take such actions and to file such documents as may
be required to ensure that the valuation of the  Equipment,  as reflected on the
records and tax rolls of applicable taxing authorities, does not exceed the fair
market value of the  Equipment.  To the extent  LESSEE is not  permitted to file
such returns, reports, or documents,  LESSEE shall prepare them and provide them
to LESSOR  for  filing  prior to the date such  return or report is due.  LESSOR
shall have the right to affix a stencil,  plate,  label or other  indicia of its
ownership  to the  Equipment  and  LESSEE  shall  not  remove  or  conceal  such
identification.  LESSEE shall have the right to quiet enjoyment of the Equipment
during the term of the Lease Schedule, so long as no event of default (as herein
defined) occurs.

<PAGE>


5.  LOCATION,  USE,  MODIFICATIONS  AND  ALTERATIONS:  LESSEE shall not move, or
permit the movement of, the Equipment from the location (hereinafter referred to
as "Equipment  Location") specified in the Lease Schedule without LESSOR'S prior
written  consent.  LESSEE  shall not use,  or permit the use of,  the  Equipment
unless such use is consistent  with LESSEE'S  business,  by qualified  operators
under  LESSEE'S   control  and  in  compliance  with  (A)  applicable  laws  and
regulations;   (B)  the   specifications   of,  and  use  contemplated  by,  the
manufacturer of the Equipment  (hereinafter referred to as "Manufacturer");  (C)
the terms of LESSEE'S insurance  coverage;  and (D) the requirements of LESSEE'S
maintenance  agreement  regarding  the  Equipment.  LESSEE  shall  not  make any
modifications,  alterations or additions to the Equipment without LESSOR'S prior
written consent (other than Manufacturer's  Changes, as such term is hereinafter
defined)  unless said additions (A) are readily  removable  without  causing any
damage to the Equipment and (B) do not impair the quality,  safety,  function or
marketability  of  the  Equipment  (hereinafter  referred  to  as  a  "Permitted
Modification").  Any  Permitted  Modification  shall not become the  property of
LESSOR  and  shall not be  subject  to the Lease  Schedule,  provided  that upon
termination  or  expiration  of the term,  LESSEE  shall  remove  all  Permitted
Modifications and restore the Equipment to its original condition (ordinary wear
and tear  excepted),  all at no  expense  to  LESSOR.  LESSEE  shall  permit the
Manufacturer,  its agents or its  contractors,  access to the  Equipment for the
purpose of performing such upgrades, recall orders or engineering changes as the
Manufacturer  shall require to enhance or maintain the  Equipment's  standard of
performance  (herein defined as  "Manufacturer's  Changes"),  all of which shall
immediately become the property of LESSOR and be subject to the Lease Schedule.

6.  MAINTENANCE  AND INSPECTION:  THIS IS A NET LEASE.  LESSEE shall, at its own
expense,  maintain the  Equipment in good  condition  and repair and furnish all
necessary repairs,  parts,  materials and supplies.  At all times herein, LESSEE
shall  keep  in  full  force  and  effect  a  maintenance   agreement  with  the
Manufacturer or, with LESSOR'S consent,  with an equivalent service organization
that routinely maintains such Equipment  (hereinafter referred to as "Equivalent
Service Organization"). During reasonable business hours and subject to LESSEE'S
reasonable security precautions, LESSEE shall permit LESSOR access to all of the
Equipment  for the purpose of  inspecting  the  Equipment to determine  LESSEE'S
compliance  with this MASTER  LEASE.  If LESSEE is not in  compliance  with this
MASTER LEASE, LESSOR shall notify LESSEE in writing of the acts of noncompliance
and LESSEE shall  immediately cease using the Equipment until full compliance is
achieved.

7.  DISCLAIMER  OF  WARRANTIES:   LESSEE  has  selected  at  its  own  risk  the
Manufacturer,  size and design of the Equipment. LESSEE acknowledges that LESSOR
is not the Manufacturer,  or its agent or distributor,  and that LESSOR MAKES NO
REPRESENTATIONS  OR  WARRANTY  OF  ANY  KIND  WHATSOEVER,  EXPRESS  OR  IMPLIED,
INCLUDING BUT NOT LIMITED TO  REPRESENTATIONS  OR WARRANTIES WITH RESPECT TO THE
MERCHANTABILITY,   VALUE,  CONDITION,   QUALITY,  DESIGN,  CAPACITY,   MATERIAL,
WORKMANSHIP  OR  FITNESS OR  SUITABILITY  FOR ANY  PURPOSE OR USE BY LESSEE,  OR
PATENT,  COPYRIGHT  OR  TRADEMARK  INFRINGEMENT.  LESSOR SHALL NOT BE LIABLE FOR
LOSSES OR DAMAGES THEREFROM,  INCLUDING BUT NOT LIMITED TO LOSS OF BUSINESS,  OR
ACTUAL OR  ANTICIPATED  PROFITS,  OR OTHER DIRECT,  INCIDENTAL OR  CONSEQUENTIAL
DAMAGES OF ANY KIND WHATSOEVER  ARISING FROM THIS MASTER LEASE OR THE EQUIPMENT.
So long as no Event of Default (as herein  defined) has  occurred and  continues
uncured,   LESSOR   assigns   LESSEE  all  of   Manufacturer's   warranties  and
indemnifications,  to  the  extent  said  warranties  and  indemnifications  are
assignable.

8. RISK OF LOSS: LESSEE hereby assumes and shall bear the entire risk of changes
to, loss,  theft,  damage,  destruction or seizure  (hereinafter  referred to as
"Event of Loss") of the Equipment from every cause whatsoever.  No Event of Loss
shall  relieve  LESSEE of its  obligations  to pay rent or to perform  any other
obligation  under this  MASTER  LEASE.  If any of the  Equipment  is damaged and
repairable,  LESSEE shall promptly  notify LESSOR of the occurrence of the Event
of Loss and shall, at LESSEE'S  expense within thirty (30) days of such Event of
Loss,  cause  repairs to be made to the Equipment to restore it to the condition
required  pursuant  to Section 6 herein.  If the  Equipment  is  damaged  beyond
repair,  LESSEE shall  promptly  notify LESSOR of the occurrence of the Event of
Loss and shall,  at  LESSEE'S  expense  within  thirty (30) days of the Event of
Loss:  (A) replace the Equipment  with like equipment in good repair and working
order or (B) pay to LESSOR in cash the  following:  (1) the  greater  of (a) ten
percent (10%) of the Lease Basis Cost or (b) the actual fair market value of the
Equipment  calculated  as of the date of the Event of Loss;  and (2) all amounts
which have  accrued and have not been paid by LESSEE to LESSOR under this MASTER
LEASE  through the date of the Event of Loss;  and (3) the present  value of the
unpaid rent  discounted  at a rate of five percent (5%) for the remainder of the
Initial Term for each Lease  Schedule  covering the Equipment  (the total amount
described in (1), (2), and (3) above is hereinafter  collectively referred to as
"Casualty Value").

<PAGE>


9. INSURANCE:  LESSEE shall provide and maintain,  at its sole cost and expense:
(1) all risk property  insurance on the Equipment for its full replacement value
in an amount no less  than the  Casualty  Value,  and (2)  comprehensive  public
liability  and property  damage  insurance on the  Equipment in amounts not less
than  $1,000,000.00 per occurrence and  $3,000,000.00 in the aggregate,  with an
insurer  reasonably  acceptable to LESSOR  considering  the risks to be insured.
LESSEE shall provide LESSOR or its assigns (in a form acceptable to LESSOR) with
certificates of insurance and a loss payable  endorsement in favor of LESSOR and
its  assigns,  as loss payee for  property  damage  coverage  and as  additional
insured for public liability coverage.  If specifically  requested in writing by
LESSOR,  LESSEE  shall  provide a copy of the  insurance  policy under which the
certificates  are issued.  The  insurance  endorsement  shall  provide  that the
coverage  shall not be materially  altered or cancelled  unless thirty (30) days
prior  written  notice has been given to LESSOR  and its  assigns,  and that the
coverage afforded to LESSOR and its assigns, shall not be rescinded, impaired or
invalidated  by any act or omission of LESSEE.  LESSOR may apply proceeds of any
such insurance to any of LESSEE'S  obligations  hereunder,  but shall pay excess
proceeds,  if any, to LESSEE upon LESSEE'S full  satisfaction of its obligations
hereunder.

10.  GENERAL  INDEMNIFICATION:  Except  for  liability  arising  from the  gross
negligence  or willful  misconduct of LESSOR,  its  employees or agents,  LESSEE
hereby  agrees to  indemnify,  defend,  protect  and hold  LESSOR,  its  agents,
employees,  directors and assigns  harmless from and against any and all claims,
losses, damages. injuries, suits, demands or expenses, including but not limited
to attorney's fees and costs of whatever kind and nature,  arising in connection
with the  Equipment,  including  without  limitation  its  selection,  purchase,
installation,  use, deinstallation,  delivery,  return or manufacture (including
without  limitation  patent,  trademark  or other  infringement).  LESSEE  shall
promptly notify LESSOR or its assigns of any matter hereby indemnified against.

11.  RETURN  OF  EQUIPMENT:  Upon  the  expiration  of  any  Lease  Schedule  or
termination  for any other  cause,  LESSEE at is sole  cost and  expense,  shall
assemble, crate, insure and deliver all of the Equipment, and all of the service
records relating thereto,  subject to the Lease Schedule,  to LESSOR in the same
good condition and repair as when received,  ordinary wear and teat excepted, to
such reasonable destination within the continental United States as LESSOR shall
designate.  LESSEE  shall  immediately  prior  to the  return  of  each  unit of
Equipment,  provide LESSOR a letter from the  Manufacturer  certifying that each
unit of Equipment is in good working order, ordinary wear and tear excepted, and
is eligible  for a  maintenance  agreement  by the  Manufacturer  or  Equivalent
Service  Organization.  LESSEE  shall  provide  LESSOR with at least one hundred
twenty (120) days written notice of the return of the Equipment. Notwithstanding
any other rights and remedies of LESSOR, if LESSEE fails to return the Equipment
to LESSOR or its designee within ten (10) days of the time required,  then until
such time as the Equipment is returned, LESSEE shall pay on demand as liquidated
damages,  not as a penalty,  and at LESSOR'S  election,  an amount  equal to (A)
twelve (12) months rent; or (B) one hundred twenty percent (120%) of the Monthly
Rent for each month or portion thereof until the Equipment is returned to LESSOR
as detailed herein.

12. LESSEE'S  REPRESENTATIONS AND WARRANTIES:  LESSEE represents and warrants to
LESSOR with regard to this MASTER  LEASE and each Lease  Schedule to be appended
hereto that:

a. The  execution,  delivery and  performance of this MASTER LEASE and any Lease
Schedule  have  been  duly  authorized  by all  necessary  action on the part of
LESSEE,  and this MASTER LEASE  constitutes  a valid and binding  obligation  of
LESSEE enforceable against LESSEE in accordance with its terms;

b. The  individual  executing  this  MASTER  LEASE on  behalf  of LESSEE is duly
authorized;

c.  Neither the  execution or delivery by LESSEE of this MASTER  LEASE,  nor the
performance  thereof  by  LESSEE,  conflicts  with,  results  in a breach  of or
constitutes  a default or violation of LESSEE'S  Certificate  of  Incorporation,
By-Laws,  applicable  law,  court order or any agreement or other  instrument to
which LESSEE is a party or by which it is bound;


<PAGE>

d. LESSEE is duly organized and in good standing in its state of  incorporation,
is duly  qualified to do business in each  jurisdiction  where the  Equipment is
located and where such qualification is required;

e. Upon request by LESSOR,  LESSEE shall furnish its most recent  audited annual
financial  statements  prepared in accordance with generally accepted accounting
principles;  and LESSEE shall furnish its quarterly financial  statements within
___ days after the end of each quarter,  prepared in accordance  with  generally
accepted  accounting  principles,  and being certified as true and correct by an
authorized officer of LESSEE;

f. LESSEE shall provide to LESSOR any other  documents  reasonably  requested to
consummate  this  transaction  or any Lease  Schedule or as reasonably  required
under this MASTER LEASE;

g. No  approval,  consent or  authorization  is required  from any  governmental
authority with respect to the execution,  delivery or performance of this MASTER
LEASE, or if any such approval,  consent or  authorization  is required,  it has
been obtained.

13.  EVENT OF DEFAULT:  The  occurrence  of any of the  following  events  shall
constitute an event of default by LESSEE or its guarantor  (hereinafter referred
to as an "Event of Default"):

a. Failure to pay when due any  installment  of rent or other sum due hereunder,
and such failure shall continue for more than five (5) days; or

b. Failure to perform any other term or condition,  covenant,  representation or
warranty of this MASTER LEASE or any Lease Schedule,  and such failure continues
for a period of twenty (20) days after notice thereof; or

c. If LESSEE or its guarantor ceases doing business as a going concern,  becomes
insolvent,  admits in writing its inability to pay its debts as they become due,
makes an assignment for the benefit of its creditors, files a voluntary petition
or answer seeking any reorganization,  arrangement,  composition,  readjustment,
liquidation,  dissolution  or similar relief under any present or future federal
or state statute,  law or regulation,  admits,  consents to or acquiesces in the
appointment  of a receiver or trustee of any of its property,  the commission of
any act of  dissolution,  liquidation or the bankruptcy or death of the LESSEE'S
guarantor in the event that the Guarantor is a natural person; or

d.  Failure  within  sixty (60) days after the  commencement  of any  proceeding
against  LESSEE  or  its  guarantor  seeking  any  reorganization,  arrangement,
composition,  readjustment,  liquidation,  dissolution,  bankruptcy  or  similar
relief under any current or future federal or state  statute,  law or regulation
to obtain the dismissal of such proceeding; or

e. If any  warranty,  covenant  or  representation  made by  LESSEE to LESSOR is
false,  incorrect or untrue in any material respect; or if any Equipment subject
to a Lease Schedule is attached, levied upon, encumbered,  pledged or seized; or
LESSEE  defaults under any other  agreement  with LESSOR;  or defaults under any
other material lease, loan or agreement for the borrowing of money; or

f. There is a material  adverse  change in the financial  condition of LESSEE or
its guarantor.

14. REMEDIES: At any time after an Event of Default, LESSOR shall have the right
to exercise any one or more of the following cumulative remedies:

a. Accelerate without notice to LESSEE all of LESSEE'S obligations hereunder and
to sue for and recover all rents and other  amounts  which have accrued or shall
accrue under this MASTER LEASE,  all of which shall become  immediately  due and
payable upon demand by LESSOR;

b.  Require  that  LESSEE  assemble  the  Equipment  and deliver it to LESSOR as
provided  under Section 11 or enter the premises  where any Equipment is located
without  notice or process of law and take  possession of the Equipment  without
incurring  any  liability  to LESSEE or any other party for any damages  arising
from such taking of possession;

c.   Sell any or all of the Equipment at public or private sale or relet same;

d.  Terminate  this MASTER  LEASE or any Lease  Schedule as to any or all of the
Equipment; and

<PAGE>


e. At law or in  equity,  enforce  any of  LESSOR'S  rights or pursue  any other
remedy now or hereafter arising.

LESSOR'S  remedies  hereunder are cumulative in nature,  not exclusive,  and the
exercise of any  particular  remedy  shall not be construed to be an election of
remedies  by LESSOR nor shall any waiver or delay by LESSOR of any of its rights
or remedies under this MASTER LEASE be construed as a waiver of LESSOR'S  rights
to enforce  that, or any other,  right or remedy in the future.  Notwithstanding
LESSOR'S election of remedies,  LESSEE shall remain liable for the present value
of all rents  discounted  at a rate of five percent (5%) and other amounts which
have accrued or would have accrued  during the Initial  Term, in addition to (A)
all of LESSOR'S costs and expenses  incurred in enforcing its rights  hereunder,
or in taking  of  possession,  storing,  repairing,  selling  or  reletting  the
Equipment,  (B) court costs and  reasonable  attorney's  fees, and (C) an amount
equal to the greater of (1) ten percent (10%) of the Lease Basis Cost or (2) the
fair market value  calculated as of the date of such Event of Default,  less (D)
the net  proceeds  of a public or  private  sale or  reletting,  if any,  of the
Equipment,  at the present  value,  if  necessary,  discounted at a rate of five
percent (5%) and (E) any insurance  proceeds  recovered by LESSOR from insurance
coverage  provided by LESSEE.  However,  in no event shall LESSOR'S  exercise of
more than one of its remedies entitle LESSOR to recover from LESSEE an amount in
excess of that referred to in this section.

15.  ASSIGNMENT AND SUBLEASE:

a. LESSOR'S  ASSIGNMENT:  LESSEE  understands and  acknowledges  that LESSOR has
entered  into this  MASTER  LEASE and shall  enter into each Lease  Schedule  in
anticipation of assigning,  mortgaging, or otherwise transferring its rights and
interests thereunder and/or in the Equipment (but not its obligations) to others
(hereinafter  referred to as  "Assignees")  without  notice to or the consent of
LESSEE. Accordingly, LESSOR and LESSEE agree that:

(1)  LESSEE  will,  after due  notice,  acknowledge  in writing  such  notice of
assignment as reasonably  requested by LESSOR or its Assignee,  and pay directly
to the  designated  Assignee the amounts  which  become due under each  assigned
Lease  Schedule and such payment  shall be absolute and  unconditional,  without
reduction,  abatement,  offset or counterclaim of any kind.  Notwithstanding the
foregoing,  LESSEE reserves its rights to have recourse  directly against LESSOR
on account of any claim it may have against LESSOR.

(2) Any Assignee may reassign its rights and interests  hereunder  with the same
effect as the original assignment.

(3) LESSEE agrees to execute all filings pursuant to the Uniform Commercial Code
as well as any other documents  reasonably  requested by LESSOR or its Assignee.
Any  Assignee  shall  not be  liable to  LESSEE  for any  obligations  of LESSOR
hereunder.

b. LESSEE'S  ASSIGNMENT AND SUBLEASE:  Without  LESSOR'S prior written  consent,
LESSEE shall not: (A) assign any of its  obligations  hereunder,  (B) attempt to
sublease the Equipment or (C) attempt to sell,  transfer,  hypothecate,  dispose
of, lend or abandon the Equipment or any of LESSEE'S rights in it.

16.  CHOICE OF LAW AND FORUM:  This MASTER  LEASE and the  provisions  contained
herein  shall be deemed to have been  executed  at LESSOR'S  principal  place of
business in Rosemont, Illinois and shall be governed in all respects by the laws
of the State of Illinois.  LESSOR and LESSEE on behalf of  themselves  and their
assignees  further agree that courts located in the State of Illinois shall have
jurisdiction over any matters arising out of this MASTER LEASE and hereby submit
themselves to the personal jurisdiction of the Illinois courts.

17. NOTICES:  All notices or demands provided for herein shall be in writing and
shall be deemed given when  delivered  or  deposited in the United  States mail,
first  class,  postage  prepaid,  addressed  to the parties at their  respective
addresses set forth above, or at such other address as may be provided from time
to time.

18.  SURVIVAL OF  OBLIGATIONS:  All the terms and  conditions,  representations,
covenants,  warranties and agreements  contained in this MASTER LEASE and in any
Lease  Schedule or in any document in  connection  herewith  shall  specifically
survive the expiration or termination of this MASTER LEASE.

19. SEVERABILITY:  To the extent any provision of this MASTER LEASE or any Lease
Schedule is deemed partially or wholly invalid or unenforceable under applicable
law, such provision shall be effective to the extent valid and enforceable,  and
all other provisions shall remain in full force and effect.

20.  LESSOR'S  CONSENT:  When LESSOR'S  consent is required by the terms of this
MASTER LEASE, such consent shall not be unreasonably withheld.

<PAGE>


21. LEASE  SCHEDULE  REAFFIRMATION:  The  execution by LESSOR and LESSEE of each
Lease  Schedule  shall  constitute a  reaffirmation  by LESSEE of its covenants,
representations  and warranties  herein and that the same are true,  correct and
complete with respect to the Lease  Schedule as of the date of execution of each
Lease Schedule.

22.  HEADINGS:  All section  headings of this MASTER  LEASE are for  convenience
only,  and shall not in any way limit or  affect  the  meaning  or scope of this
MASTER LEASE or its provisions.

23. NO  WAIVER:  No delay,  omission  or failure to act by LESSOR at any time to
exercise or enforce any right or remedy herein provided shall be a waiver of any
such right or remedy to which LESSOR is entitled, nor shall it in any way affect
the right of LESSOR to enforce such provisions thereafter.

24. ENTIRE AGREEMENT:  This MASTER LEASE constitutes the entire agreement of the
parties hereto and no other written or oral  representations or warranties shall
be binding upon the parties hereto.  NO AGENT OR EMPLOYEE OF THE MANUFACTURER OR
SELLER OF THE EQUIPMENT IS AUTHORIZED TO BIND LESSOR TO THIS MASTER LEASE OR ANY
OTHER  AGREEMENT  OR TO  WAIVE  OR  MODIFY  ANY OF THE  PROVISIONS  HEREOF.  Any
modification  or waiver of any of the provisions  herein shall be effective only
if in writing and executed by all of the parties hereto,  provided  however that
LESSOR may add applicable  Equipment serial or  identification  numbers to Lease
Schedules and financing statements.

25.  SUCCESSOR:  This MASTER LEASE and each Lease Schedule shall be binding upon
and  shall  inure  to  the  benefit  of  LESSOR,  LESSEE  and  their  respective
successors, legal representatives and assigns.

26.  ADDITIONAL  FILINGS:  In the event that LESSEE  fails or refuses to execute
and/or file Uniform Commercial Code financing statements or other instruments or
recordings  which LESSOR or its Assignee  reasonably deems necessary to perfect,
or maintain  perfection  of,  LESSOR'S or its  Assignee's  interests  hereunder,
LESSEE   hereby   appoints   LESSOR  or  its   Assignee  as   LESSEE'S   limited
attorney-in-fact  to execute and record all  documents  reasonably  necessary to
perfect or maintain the perfection of LESSOR'S interest hereunder.  LESSEE shall
pay  LESSOR  or its  Assignee  for any costs and fees  relating  to the  filings
including,  but not limited to, costs,  fees,  searches,  document  preparation,
documentary stamps, privilege taxes and reasonable attorneys' fees.

27. MULTIPLE LESSEES: If more than one LESSEE is named within this MASTER LEASE,
the liability of each shall be joint and several.

28. LEASE  ACCEPTANCE:  At no time shall this MASTER LEASE or the Lease Schedule
be deemed to  constitute  an offer  binding  upon LESSOR until it is accepted by
execution of LESSOR at its corporate office in Rosemont, Illinois.


PRIME LEASING, INC.,                            PHYMED DIAGNOSTIC IMAGING
                                                CENTER-WHITE ROCK, INC.

              LESSOR                                             LESSEE


By:                                             By:
   ----------------------------------
Name (Printed):                                 Name           (Printed):
               ----------------------

Title:                                          Title:
      -------------------------------


Date:      , 2000 Date: February 11, 2000
     ------             -----------
















                                 LEASE SCHEDULE

LEASE SCHEDULE NUMBER 1      TO MASTER LEASE AGREEMENT NUMBER  11150
                                                               -----


This Lease  Schedule  incorporates  the terms and conditions of a certain Master
Lease Agreement, dated as of the 11th day of February, 2000 (the "Master Lease")
by and between  PRIME  LEASING,  INC.,  O'Hare  International  Center,  10275 W.
Higgins Road,  Rosemont,  Illinois 60018 (the "Lessor"),  and PHYMED  DIAGNOSTIC
IMAGING  CENTER-WHITE ROCK , INC., 9603 White Rock Trail,  Dallas, TX 75238 (the
"Lessee").

THIS IS A NON-CANCELABLE LEASE SCHEDULE.

1.   Initial  Term:  48  months  commencing  with  the  first  day of the  month
     immediately   following  the  Commencement  Date  (or  beginning  with  the
     Commencement Date if that date is the first day of the month.)

2.   Rental Payments: $13,365.00 per month, plus any and all applicable taxes.

     Advance  Payments  receivable  by  Lessor  as  of  the  Commencement  Date:
     $26,730.00.  $13,365.00  of which will be applied to the first month's rent
     payable under this Lease Schedule, and the remaining $13,365.00 of which is
     credited and transferred as the Deposit under the Master Lease.

3.   Deposit.  LESSEE delivered to LESSOR on the Commencement  Date of the Lease
     the sum of  Twenty-Six  Thousand  Seven Hundred  Thirty and No/100  Dollars
     ($26,760.00) in immediately  available funds (the  "Deposit").  The Deposit
     shall continue to be held by LESSOR, without liability for interest, as the
     Deposit under this Master Lease. Thirteen Thousand Three Hundred Sixty Five
     and No/100 Dollars ($13,365.00) of the Deposit is applied by LESSOR towards
     the  payment  of the first full  month of rent due under  this  Lease;  the
     remainder may be applied by LESSOR,  at LESSOR'S sole option,  for any past
     due amount due under this Master  Lease.  If LESSEE is not in default under
     the terms of this Master  Lease,  any portion of the Deposit not applied by
     LESSOR as payment of rent or any past due amount  under this Master  Lease,
     shall be  distributed by LESSOR as follows;  first,  towards the payment of
     the rent due on the last  month of this  Master  Lease;  and  second  after
     termination  of this Master Lease and  contingent on LESSEE  complying with
     all of the terms of this Master Lease, any remaining amount to LESSEE.

4.   Conditions  Precedent.  LESSOR'S  obligations under this Lease Schedule are
     subject to the following conditions precedent:

     a.   LESSEE shall have leased that certain real  property and  improvements
          ("Premises") located at 12840 Hillcrest Road, Suite 100, Dallas, Texas
          75230;

<PAGE>


     b.   LESSOR  shall  have  received  approval  for this  Master  Lease  from
          LESSOR'S Executive Committee;

     c.   LESSOR  shall have  received  the  Guaranty  (as defined in Section 8,
          below);

     d.   Lessor shall have  received a  landlord's  waiver from the landlord of
          the  Premises,  in form  satisfactory  to LESSOR,  waiving  landlord's
          rights in and to the Equipment; and

     e.   LESSOR shall have  received any other  document  reasonably  requested
          from LESSEE by LESSOR.

5.   Equipment: See Equipment Schedule attached hereto and made a part hereof.

6.   Commencement  Date:  February 11 , 2000, as evidenced by the Certificate of
     Acceptance, issued in respect to this Lease Schedule.


7.   End of Lease Options: At the end of the Initial Term, Lessee has the option
     to: (A)  purchase  all,  but not less than all,  of the  Equipment  at Fair
     Market Value, as described in the Master Lease; (B) renew the lease of all,
     but not less than all, of the Equipment at a Monthly Rent based on the then
     Fair Market  Value of the  Equipment;  or (C) return all, but not less than
     all, of the Equipment, subject to the terms and conditions as stipulated in
     the Master Lease.

8.   Guaranty.  By its  signature  below,  PHYMED,  INC.,  a  Texas  corporation
     ("PARENT"),  agrees that it will  execute a Guaranty,  dated as of the date
     hereof, that is acceptable to LESSOR, at LESSOR'S sole discretion,  whereby
     PARENT will guarantee to LESSOR,  the due,  regular and punctual payment of
     all of LESSEE'S obligations herein, including all rents due herein.

9.   Entire Agreement:  LESSEE REPRESENTS THAT IT HAS READ, RECEIVED, RETAINED A
     COPY OF AND  UNDERSTANDS  THIS LEASE SCHEDULE AND AGREES TO BE BOUND BY ITS
     TERMS AND CONDITIONS. LESSOR AND LESSEE AGREE THAT THIS LEASE SCHEDULE, THE
     MASTER LEASE AND ALL RIDERS THERETO SHALL  CONSTITUTE THE ENTIRE  AGREEMENT
     AND SUPERSEDE ALL PROPOSALS,  ORAL OR WRITTEN,  ALL PRIOR  NEGOTIATIONS AND
     ALL OTHER COMMUNICATIONS BETWEEN LESSOR AND LESSEE WITH RESPECT TO ANY UNIT
     OF EQUIPMENT.

THIS LEASE SCHEDULE IS EFFECTIVE ONLY UPON ACCEPTANCE BY LESSOR AT ITS CORPORATE
OFFICE IN ROSEMONT, ILLINOIS. Accepted on , 2000, at Rosemont, Illinois.

PRIME LEASING, INC.                       PHYMED DIAGNOSTIC IMAGING
                                          CENTER -WHITE ROCK, INC.
(Lessor)                                  (Lessee)

By:__________________________________     By:_______________________________

Name (Printed):______________________     Name (Printed):___________________

Title:_______________________________     Title:____________________________

                                          Date: ______________________, 2000



PHYMED, INC.,
(Parent)



By:__________________________________

Name (Printed):______________________

Title:_______________________________

Date: February ___, 2000




<PAGE>


                               EQUIPMENT SCHEDULE

                                       TO

                             LEASE SCHEDULE NUMBER 1

                                       TO

                       MASTER LEASE AGREEMENT NUMBER 11150
                                                     -----

Quantity          Description of Equipment                     Serial Number
- --------          ------------------------                     -------------

One(1)            Picker Ultra Z High Performance CT System
                  Including all additions, accessories and
















EQUIPMENT LOCATION:  12840 Hillcrest Road, Suite 100, Dallas, TX   75230





<TABLE>
<CAPTION>


                        AGREEMENT OF LIMITED PARTNERSHIP

                                       OF

                               WHITE ROCK JV, LTD.

                                TABLE OF CONTENTS

                                                                                                               Page
                                                                                                               ----
ARTICLE I             ORGANIZATIONAL MATTERS
<S>                                                                             <C>                              <C>

         1.1      Formation...............................................................................        1
         1.2      Name....................................................................................        1
         1.3      Term....................................................................................        1
         1.4      Registered Office and Principal Office of Partnership;
                  Addresses of Partners...................................................................        2
         1.5      Ownership...............................................................................        2
         1.6      Title to Partnership Property...........................................................        2
         1.7      Limits of Partnership...................................................................        2

ARTICLE II            DEFINITIONS.........................................................................        2

ARTICLE III           PURPOSE

         3.1      Purposes and Scope......................................................................        8

ARTICLE IV            CAPITAL CONTRIBUTIONS AND CAPITAL ACCOUNTS

         4.1      Initial Capital Contributions...........................................................        8
         4.2      Additional Capital Contributions........................................................        8
         4.3      Other Capital Contributions.............................................................        8
         4.4      Defaults in Making Required Capital Contributions.......................................        8
         4.5      Capital Accounts........................................................................        9
         4.6      Negative Capital Accounts...............................................................       12
         4.7      Interest................................................................................       12
         4.8      No Withdrawal...........................................................................       12
         4.9      Loans From Partners.....................................................................       12

ARTICLE V             ALLOCATIONS

         5.1      Allocations of Profits and Losses.......................................................       13
         5.2      Special Allocations of Profits and Losses...............................................       14
         5.3      Curative Allocations....................................................................       15
         5.4      Tax Allocations:  Code Section 704(c)...................................................       16
         5.5      Other Allocation Rules..................................................................       16

ARTICLE VI            DISTRIBUTIONS

         6.1      Distributions...........................................................................       17
         6.2      Make-Up Payments........................................................................       17
         6.3      Payments Not Deemed Distributions.......................................................       18
         6.4      Withheld Amounts........................................................................       18



<PAGE>

ARTICLE VII           MANAGEMENT OF THE PARTNERSHIP

         7.1      Designation and Authority of General Partner............................................       18
         7.2      Major Decisions.........................................................................       19
         7.3      Certificate of Limited Partnership......................................................       20
         7.4      Compensation and Reimbursement of General Partner.......................................       20
         7.5      Partnership Funds.......................................................................       20
         7.6      Duties..................................................................................       20
         7.7      Transactions with Affiliates............................................................       20
         7.8      Outside Activities; Conflicts of Interest...............................................       21
         7.9      Resolution of Conflicts of Interest.....................................................       21
         7.10     Indemnification.........................................................................       21
         7.11     Liability of General Partner............................................................       21
         7.12     Reliance by General Partner.............................................................       22
         7.13     Insurance...............................................................................       22

ARTICLE VIII          RIGHTS AND OBLIGATIONS OF LIMITED PARTNERS

         8.1      Limitation of Liability.................................................................       22
         8.2      Management of Business..................................................................       22
         8.3      Outside Activities......................................................................       22
         8.4      Return of Capital.......................................................................       23

ARTICLE IX            BOOKS, RECORDS, ACCOUNTING AND REPORTS

         9.1      Records and Accounting..................................................................       23
         9.2      Fiscal Year.............................................................................       23
         9.3      Reports.................................................................................       23

ARTICLE X             TAX MATTERS

         10.1     Preparation of Tax Returns..............................................................       24
         10.2     Tax Elections...........................................................................       24
         10.3     Tax Controversies.......................................................................       24
         10.4     Organizational Expenses.................................................................       24
         10.5     Taxation as a Partnership...............................................................       24

ARTICLE XI            TRANSFERS OF PARTNERSHIP INTERESTS

         11.1     Transfer Restrictions...................................................................       24
         11.2     Transfers by General Partner............................................................       25
         11.3     Transfers by Limited Partners...........................................................       25
         11.4     Additional Limitations on Transfers of Limited Partnership Interests....................       25
         11.5     Distributions and Allocations in Respect of Transferred Partnership
                  Interests...............................................................................       25
         11.6     Admission of Initial and Substitute Limited Partners and Successor
                  General Partner.........................................................................       26
         11.7     Prohibited Transfers....................................................................       26
         11.8     Specific Performance and Other Remedies.................................................       27
         11.9     PHYMED Purchase Option..................................................................       27


<PAGE>

ARTICLE XII           WITHDRAWAL AND REMOVAL OF GENERAL PARTNER

         12.1     Events of Withdrawal....................................................................       28
         12.2     Removal.................................................................................       28

ARTICLE XIII          DISSOLUTION AND WINDING UP

         13.1     Dissolution.............................................................................       29
         13.2     Continuation of the Partnership.........................................................       29
         13.3     Liquidation.............................................................................       30
         13.4     Distribution in Kind....................................................................       31
         13.5     Cancellation of Certificate of Limited Partnership......................................       31
         13.6     Return of Capital.......................................................................       31

ARTICLE XIV           AMENDMENT OF AGREEMENT; CONSENTS

         14.1     Amendment Procedures....................................................................       32
         14.4     Action Without a Meeting................................................................       32

ARTICLE XV            GENERAL PROVISIONS

         15.1     Addresses and Notices...................................................................       32
         15.2     Titles and Captions.....................................................................       32
         15.3     Pronouns and Plurals....................................................................       32
         15.4     Further Action..........................................................................       33
         15.5     Binding Effect..........................................................................       33
         15.6     Integration.............................................................................       33
         15.7     Creditors...............................................................................       33
         15.8     Waiver..................................................................................       33
         15.9     Counterparts............................................................................       33
         15.10    Applicable Law..........................................................................       33
         15.11    Invalidity of Provisions................................................................       33
</TABLE>

EXHIBITS

Exhibit A - Percentage Interests
Exhibit B - Initial Capital Contributions
Exhibit C - MRI Lease


<PAGE>



THE PARTNERSHIP INTERESTS REPRESENTED BY THIS LIMITED PARTNERSHIP AGREEMENT HAVE
NOT  BEEN  REGISTERED  UNDER  THE  SECURITIES  ACT OF 1933 OR  UNDER  ANY  STATE
SECURITIES ACTS IN RELIANCE UPON EXEMPTIONS  UNDER THOSE ACTS. THE SALE OR OTHER
DISPOSITION  OF THE  PARTNERSHIP  INTERESTS  IS  PROHIBITED  UNLESS SUCH SALE OR
DISPOSITION  IS MADE IN COMPLIANCE  WITH ALL SUCH  APPLICABLE  ACTS.  ADDITIONAL
RESTRICTIONS  ON TRANSFER  OF THE  PARTNERSHIP  INTERESTS  ARE SET FORTH IN THIS
AGREEMENT.

                        AGREEMENT OF LIMITED PARTNERSHIP

                                       OF

                               WHITE ROCK JV, LTD.

         THIS AGREEMENT OF LIMITED PARTNERSHIP OF WHITE ROCK JV, LTD. is entered
into as of December ____, 1999 (the  "Commencement  Date"), by and among PHYMED,
INC., an Oklahoma  ("PHYMED"),  as General Partner,  and LDE Ventures,  Inc., an
Illinois corporation ("LDE"), as Limited Partner.

         Certain terms used in this agreement are defined in Article II hereof.

                                    ARTICLE I

                             ORGANIZATIONAL MATTERS

         1.1  Formation.  Subject  to the  provisions  of  this  Agreement,  the
Partners  hereby form the Partnership as a limited  partnership  pursuant to the
Texas Act. Except as expressly  provided  herein,  the rights and obligations of
the Partners and the  administration and termination of the Partnership shall be
governed by the Texas Act.

         1.2 Name. The name of the Partnership shall be, and the business of the
Partnership  shall be  conducted  under the name of,  White  Rock JV,  Ltd.  The
General Partner may change the name of the Partnership at any time and from time
to time and shall provide the Limited  Partners with written notice of such name
change within twenty (20) days after such name change.

         1.3 Term. The  Partnership  shall continue in existence until the close
of Partnership  business on December 31, 2049, or until the earlier  termination
of the  Partnership in accordance  with the provisions of Section  13.1(b).  The
General  Partner  shall not  commence or engage in any business on behalf of the
Partnership  until after the  Effective  Date,  other than matters  necessary or
incidental to the organization of the Partnership.


<PAGE>


         1.4      Registered Office and Principal Office of Partnership;
Addresses of Partners.

                  (a)  Partnership   Offices.   The  registered  office  of  the
         Partnership  in the  State of Texas  shall be 9603  White  Rock  Trail,
         Dallas, Texas 75238, and the registered agent for service of process on
         the Partnership at such registered  office shall be George C. Barker or
         such other registered office or registered agent as the General Partner
         may  from  time  to  time  designate.   The  principal  office  of  the
         Partnership  shall be 9603 White Rock Trail,  Dallas,  Texas 75238,  or
         such  other  place  as the  General  Partner  may  from  time  to  time
         designate. The General Partner shall notify each Limited Partner within
         ten (10) days  following  the change of the  location of the  principal
         office of the Partnership. The Partnership may maintain offices at such
         other place or places as the General Partner deems advisable.

                  (b)  Addresses of Partners.  The address of each Partner shall
         be the address of such Partner appearing on the signature pages to this
         Agreement.  A Partner  may change its address at any time by giving all
         of the other Partners ten (10) days prior written notice of such change
         in address.

         1.5 Ownership. The interest of each Partner in the Partnership shall be
personal property for all purposes. All property and interests in property, real
or personal,  owned by the Partnership  shall be deemed owned by the Partnership
as an entity, and no Partner,  individually,  shall have any ownership interests
in such  property  or  interest  except by having an  ownership  interest in the
Partnership as a Partner.  Each of the Partners  irrevocably waives,  during the
term of the Partnership  and during any period of its liquidation  following any
dissolution,  any right that it may have to  maintain  any action for  partition
with respect to any of the property of the Partnership.

         1.6      Title to Partnership Property.  Legal title to all property of
the Partnership shall be held and conveyed in the name of the Partnership.

         1.7 Limits of Partnership.  The relationship between the parties hereto
shall be  limited to the  carrying  on of the  business  of the  Partnership  in
accordance  with  the  terms  of this  Agreement.  Such  relationship  shall  be
construed  and  deemed  to be a  limited  partnership  for the sole and  limited
purpose of  carrying  on such  business.  Except as  otherwise  provided  for or
contemplated  in this  Agreement,  nothing herein shall be construed to create a
partnership  between the Partners or to authorize  any Partner to act as general
agent for any other Partner.



<PAGE>

                                   ARTICLE II

                                   DEFINITIONS

         The  following  definitions  shall  apply  to the  terms  used  in this
Agreement, unless otherwise clearly indicated to the contrary in this Agreement:

         "Adjusted  Capital Account Deficit" means, with respect to any Partner,
the deficit balance,  if any, in such Partner's Capital Account as of the end of
the relevant fiscal year, after giving effect to the following adjustments:  (a)
any  amounts  that such  Partner  is, or is deemed to be,  obligated  to restore
pursuant to section  1.704-1(b)(2)(ii)(c)  of the  Regulations,  the penultimate
sentence  of  section  1.704-2(g)(1)  of the  Regulations,  or  the  penultimate
sentence of section 1.704-2(i)(5) of the Regulations,  shall be credited to such
Capital    Account;    and    (b)    the    items    described    in    sections
1.704-1(b)(2)(ii)(d)(4),  (5),  and (6) of the  Regulations  shall be debited to
such Capital  Account.  The  foregoing  definition of Adjusted  Capital  Account
Deficit   is   intended   to   comply   with   the    provisions    of   section
1.704-1(b)(2)(ii)(d)  of the Regulations  and shall be interpreted  consistently
therewith.

         "Affiliate" means any Person that directly or indirectly  controls,  is
controlled by, or is under common control with, the Person in question.  As used
in this  definition,  the term  "control"  means  the  possession,  directly  or
indirectly,  of the power to direct or cause the direction of the management and
policies  of a  Person,  whether  through  ownership  of voting  securities,  by
contract or otherwise.

         "Agreement" means this Agreement of Limited Partnership  of  White Rock
JV, Ltd., as it may be amended, supplemented, or restated from time to time.

         "Available Cash" of the Partnership as of any date means all cash funds
of the  Partnership  on hand  from  time  to  time  after:  (a)  payment  of all
Partnership  Costs and  Expenses  that are due and payable as of such time;  (b)
provision for payment of all Partnership  Costs and Expenses that are reasonably
anticipated to become due and payable within 30 days following the date on which
Available  Cash is being  determined;  and (c) provision  for adequate  reserves
(working capital and/or capital),  the amount of such reserves to be established
by the General Partner and approved by a Super-Majority Interest.

         "Average  Daily Scans"  means,  with  respect to a particular  calendar
month,  the quotient of (a) the aggregate  number of scans performed by the MRI,
all Business Days for such calendar month, divided by (b) the number of Business
Days during such calendar month.

         "Book Depreciation" has the meaning set forth in Section 4.5(b)(v).

         "Book Value" has the meaning set forth in Section 4.5(c).

         "Business  Day"  means  any day  during  which  the  Center is open for
patient treating for at least 5 hours.

         "Capital  Account" means the capital  account  maintained for a Partner
pursuant to Section 4.5(a).

         "Capital  Contribution" means any cash or other property contributed by
a Partner to the Partnership pursuant to the provisions of this Agreement.

         "Center" means the location in Dallas, Texas where the MRI is operated.


<PAGE>


         "Certificate"  means the Certificate of Limited  Partnership filed with
the  Secretary  of State of the State of Texas  pursuant to Section 7.3, as such
Certificate may be amended or restated from time to time.

         "Code"  means the  Internal  Revenue  Code of 1986,  as amended  and in
effect from time to time.

         "Commencement Date" means December _____, 1999.

         "Composite  Sharing  Ratio" of each Partner  means,  at any  particular
time, the quotient  (expressed as a percentage)  of (a) the aggregate  amount of
distributions  since the Commencement  Date to such Partner under Section 6.1(c)
hereof,  divided  by  (b)  the  aggregate  amount  of  distributions  since  the
Commencement Date to all Partners under Section 6.1(c) hereof.

         "Event  of  Bankruptcy"  means,  with  respect  to any  Partner  or the
Partnership, any of the following acts or events:

          (a) making an assignment for the benefit of creditors;

          (b)  filing a voluntary petition in bankruptcy;

          (c)  becoming  the  subject of an order for  relief or being  declared
     insolvent  or  bankrupt in any federal or state  bankruptcy  or  insolvency
     proceeding;

          (d) filing a petition or answer seeking a reorganization, arrangement,
     composition,  readjustment,  liquidation,  dissolution,  or similar  relief
     under any statute, law or regulation;

          (e) filing an answer or other pleading admitting or failing to contest
     the material  allegations of a petition filed against it in a proceeding of
     the type described in parts (a) through (d) of this definition;

          (f) making an  admission  in writing of an  inability  to pay debts as
     they mature;

          (g)  giving  notice  to any  governmental  body  that  insolvency  has
     occurred,  that  insolvency  is  pending,  or  that  operations  have  been
     suspended;

          (h) seeking,  consenting to, or  acquiescing  in the  appointment of a
     trustee,  receiver,  or  liquidator of all or any  substantial  part of its
     properties; or

          (i) the expiration of 90 days after the date of the  commencement of a
     proceeding  against  such  Person  seeking   reorganization,   arrangement,
     composition,  readjustment,  liquidation,  dissolution,  or similar  relief
     under any  statute,  law,  or  regulation  if the  proceeding  has not been
     previously  dismissed,  or the  expiration of 60 days after the date of the
     appointment,  without such Person's consent or acquiescence,  of a trustee,
     receiver, or liquidator of such Person or of all or any substantial part of
     such  Person's  properties,  if the  appointment  has not  previously  been
     vacated  or  stayed,  or the  expiration  of 60  days  after  the  date  of
     expiration of a stay, if the appointment has not been previously vacated.


<PAGE>


         "Excess Amount" has the meaning set forth in Section 5.1(a)(iii).

         "General Partner" means PHYMED, Inc., in  its  capacity  as the general
partner of the Partnership, or its successors or assigns.

         "Limited  Partners" means LDE Ventures,  Inc., and any other Person who
has been admitted or is deemed to have been admitted as a limited partner in the
Partnership  and whose  admission has been reflected on the books and records of
the Partnership.

         "Liquidator" has the meaning set forth in Section 13.3.

         "Losses" has the meaning set forth in Section 4.5(b).

         "MRI" means the  magnetic  resonance  imaging  machine  operated by the
Partnership pursuant to the MRI Lease.

         "MRI Lease" means that certain  Lease,  by and between the  Partnership
and Prime Leasing, Inc., attached hereto as Exhibit C.

         "Nonrecourse   Deductions"   has  the  meaning  set  forth  in  section
1.704-2(b)(1) of the Regulations.

         "Option Notice" has the meaning set forth in Section 11.9(b).

         "Partner" means a General Partner or a Limited Partner.

         "Partner  Minimum Gain" means partner  nonrecourse debt minimum gain as
determined under the rules of section 1.704-2(i) of the Regulations.

         "Partner  Nonrecourse  Deduction"  has the meaning set forth in section
1.704-2(i)(1) and (2) of the Regulations.

         "Partnership"  means the limited  partnership  established  pursuant to
this Agreement by the filing of the  Certificate  with the Secretary of State of
the State of Texas.

         "Partnership Estimated Net Taxable Income" has the meaning set forth in
Section 6.4(a).

         "Partnership  Interest" means the interest acquired by a Partner in the
Partnership  including,  without  limitation,  such Partner's  right:  (a) to an
allocable  share of the  Profits,  Losses,  and  other  income,  gains,  losses,
deductions,  and credits of the Partnership;  (b) to a distributive share of the
assets of the Partnership;  (c) if a Limited  Partner,  to vote on those matters
described  in this  Agreement;  and (d) if the  General  Partner,  to manage and
operate the Partnership.


<PAGE>


         "Partnership  Minimum  Gain"  has the  meaning  set  forth  in  section
1.704-2(d) of the Regulations.

         "Percentage  Interest"  means the  percentage  interest of a Partner in
certain  rights and  obligations  described in this  Agreement.  The  Percentage
Interest  of each  Partner  as of any date is set forth in  Exhibit  A  attached
hereto, as such Exhibit may be revised from time to time to reflect  adjustments
pursuant to Section 4.4, Section 4.5 and Article XI hereof.

         "Person"  means an individual  or a  corporation,  partnership,  trust,
estate, unincorporated organization, association, or other entity.

         "Prime Rate" means the rate of interest  announced from time to time by
Bank One, as its prime, reference or other similar rate.

         "Profits" has the meaning set forth in Section 4.5(b).

         "Purchase Price" has the meaning set forth in Section 11.9(c).

         "Regulations" means the Department of Treasury Regulations  promulgated
under the Code, as amended and in effect (including  corresponding provisions of
succeeding regulations).

         "Regulatory Allocations" has the meaning set forth in Section 5.3.

         "Securities Act" means the Securities Act of 1933, as amended,  and any
successor to such statute.

         "Sharing  Ratios" means,  with respect to a particular  calendar month,
the following  percentages based on the Average Daily Scans performed by the MRI
for such month:


<PAGE>


    ----------------------------------------------------------------------------
      Average Daily Scans for      Sharing Ratio for     Sharing Ratio for LDE
      Such Calendar Month         PHYMED for Such       for SuchCalendar Month
                                   Calendar Month
    ----------------------------------------------------------------------------
           5 or fewer                       35.00%                  65.00%
                6                           36.67%                  63.33%
                7                           37.86%                  62.14%
                8                           38.75%                  61.25%
                9                           39.44%                  60.56%
               10                           40.00%                  60.00%
               11                           40.46%                  59.54%
               12                           40.83%                  59.17%
               13                           41.15%                  58.85%
               14                           41.43%                  58.57%
               15                           41.67%                  58.33%
               16                           41.88%                  58.12%
               17                           42.05%                  57.95%
               18                           42.22%                  57.78%
               19                           42.37%                  57.63%
           20 or more                       42.50%                  57.50%


         The Partners hereby agree that the Sharing Ratios of the Partners shall
be automatically adjusted pursuant to Sections 4.4(c) and 6.2 hereof.

         "Shortfall" has the meaning set forth in Section 4.2.

         "Super-Majority  Interest"  means  the  owners  of more than 85% of the
Percentage Interests of the Partners.

         "Texas Act" means the Texas Revised Limited  Partnership  Act,  Article
6132a-1 of Title 105 of the Texas Revised Civil  Statutes,  as it may be amended
from time to time, and any successor to such Texas Act.

         "Transfer" has the meaning set forth in Section 11.1.

         "Undistributed  Priority  Return"  means,  with  respect  to LDE on any
particular date, the amount in a special recordkeeping account maintained by the
Partnership for LDE equal to: (a) the product of (i) $18,750  multiplied by (ii)
the  number  of  calendar  months  (and  partial   calendar   months)  from  the
Commencement Date to such particular date;  reduced (but not below zero) by: (b)
the sum of (i) aggregate  amount of cash  distributed to LDE pursuant to Section
6.1(a), plus (ii) the aggregate amount of UPR Elimination  Payments to LDE which
have actually been made since the Commencement Date.

         "UPR Elimination Payment" has the meaning set forth in Section 6.2.


<PAGE>


                                   ARTICLE III

                                     PURPOSE

         3.1   Purposes and Scope.  Subject to the provisions of this Agreement,
 the purpose of the Partnership are to:

               (a) operate, lease, manage, improve, sell, transfer and otherwise
          use the MRI to be located in Dallas, Texas;

               (b) enter into contracts with respect to the use and operation of
          the MRI, advertise and promote the use of the MRI; and

               (c) do any and all other acts or things  which may be  incidental
          or  necessary to carry on the  business of the  Partnership  as herein
          contemplated.

                                   ARTICLE IV

                   CAPITAL CONTRIBUTIONS AND CAPITAL ACCOUNTS

         4.1 Initial  Capital  Contributions.  On the  Commencement  Date,  each
Partner shall be credited with making the Capital Contribution shown opposite of
its or his name on Exhibit B hereto, and in that regard,  each Partner's Capital
Account as of the Commencement Date shall be the amount shown opposite of its or
his name on Exhibit B hereto.

         4.2 Additional Capital  Contributions.  After the Capital Contributions
described in Section 4.1 have been made, if at any time,  the  Partnership  does
not  have  sufficient  cash  funds  on  hand to pay its  operating  expenses  (a
"Shortfall"),  PHYMED shall make a Capital Contribution to the Partnership equal
to such Shortfall.  LDE shall not be obligated to make any Capital  Contribution
to the Partnership other than the Capital Contribution described in Section 4.1.

         4.3 Other Capital Contributions. Except as provided in Sections 4.1 and
4.2 hereof,  no Partner shall be required to make any Capital  Contributions  to
the Partnership without the unanimous consent of the Partners.  If, however, the
Partners  unanimously  consent to making  Capital  Contributions  in addition to
those  set forth in  Sections  4.1 and 4.2  hereof,  the  Capital  Contributions
approved unanimously by the Partners shall become required Capital Contributions
pursuant to the terms of the mandate approved by the Partners.

         4.4      Defaults in Making Required Capital Contributions.

                  (a) If a Partner  reasonably  determines  that another Partner
         has failed to make a Capital Contribution required under Section 4.1 or
         Section 4.2, then the General Partner (or if the General Partner or its
         Affiliate  is the  defaulting  Partner,  then a Partner  that is not an
         Affiliate  of the General  Partner)  shall send a notice (the  "Default
         Notice") to the Partner failing to make such Capital  Contribution  and
         to all other Partners,  notifying the defaulting Partner of its failure
         to make such Capital  Contribution,  the amount to be contributed,  and
         requesting  that such Capital  Contribution be made  immediately.  If a
         Partner fails to make a Capital  Contribution as required under Section
         4.2  within  five (5)  Business  Days  after  receiving  such a Default
         Notice,  then  the  Partner  failing  to  make  such  required  Capital
         Contribution  and  each of its  Affiliates  shall be in  default  (such
         Partner is referred to as the "Defaulting  Partner" and the amount that
         such  Partner  failed to  contribute  is  referred  to as the  "Default
         Amount").

<PAGE>


                  (b) If a Partner is a  Defaulting  Partner,  then the Partners
         that are not Defaulting  Partners (the  "Non-Defaulting  Partners") may
         advance an amount to the Partnership  equal to the Default Amount.  The
         Partners acknowledge and agree that any such advance shall be deemed to
         be a loan from the Non-Defaulting  Partner to the Defaulting Partner (a
         "Partner  Default  Loan").  Any such  Partner  Default  Loan  will be a
         nonrecourse obligation of the Defaulting Partner, will bear interest at
         the greater of (i) the Prime Rate plus 800 basis  points per annum,  or
         (ii)  fifteen  percent  per  annum,  will be  secured  by a first  lien
         priority  security  interest in the  Defaulting  Partner's  Partnership
         Interest,  and will be repaid out of any and all distributions to which
         the Defaulting Partner would otherwise be entitled from the Partnership
         until all accrued  interest and  outstanding  principal on such Partner
         Default Loan has been paid in full. A Defaulting  Partner may repay any
         Partner Default Loan at any time before  conversion of such loan into a
         Capital Contribution.

                  (c) At any time after sixty (60) days following the date after
         a Partner Default Loan has been made, a  Non-Defaulting  Partner making
         such loan may elect,  by providing  notice to each Partner,  to convert
         the Partner Default Loan into a Capital Contribution in an amount equal
         to the outstanding  principal balance of such Partner Default Loan. The
         accrued but unpaid  interest on such Partner  Default Loan shall remain
         an obligation of the Defaulting Partner. Upon making such election, the
         Sharing  Ratio  of the  Defaulting  Partner  for  each  calendar  month
         following  the date of such  election  shall be equal to 50  percent of
         what it otherwise would be, and the Sharing Ratio of the Non-Defaulting
         Partner  shall  be equal to the sum of (i) the  Sharing  Ratio  that it
         would have absent such election,  plus (ii) the amount of Sharing Ratio
         lost by the Defaulting Partner as a result of such election.

         4.5      Capital Accounts.

                  (a) Maintenance Rules. The Partnership shall maintain for each
         Partner a separate Capital Account in accordance with this Section 4.5,
         which shall  control the  division  of assets upon  liquidation  of the
         Partnership as provided in Section 13.3.  Each Capital Account shall be
         maintained in accordance with the following provisions:

                           (i) Such  Capital  Account  shall be increased by the
                  cash amount or Book Value of any property  contributed by such
                  Partner to the Partnership  pursuant to this  Agreement,  such
                  Partner's  allocable  share of  Profits  and any  items in the
                  nature of income or gains  which are  specially  allocated  to
                  such Partner  pursuant to Section 5.2 and Section 5.3, and the
                  amount of any Partnership  liabilities assumed by such Partner
                  or which  are  secured  by any  property  distributed  to such
                  Partner.

                           (ii) Such Capital  Account  shall be decreased by the
                  cash amount or Book Value of any property  distributed to such
                  Partner pursuant to this Agreement,  such Partner's  allocable
                  share of Losses and any items in the nature of  deductions  or
                  losses which are specially  allocated to such Partner pursuant
                  to  Section  5.2  and  Section  5.3,  and  the  amount  of any
                  liabilities of the Partner assumed by the Partnership or which
                  are secured by any property contributed by such Partner to the
                  Partnership.


<PAGE>

                           (iii)  If  all or a  portion  of an  interest  in the
                  Partnership  is  transferred  in accordance  with the terms of
                  this  Agreement,  the transferee  shall succeed to the Capital
                  Account  of the  transferor  to the  extent it  relates to the
                  transferred interest;  provided, however, that if the transfer
                  causes  a  termination  of  the   Partnership   under  section
                  708(b)(1)(B) of the Code, then the Partnership shall be deemed
                  to  have  contributed  its  assets  to a  new  partnership  in
                  exchange  for all of the  interests  in the  new  partnership,
                  followed  by a  distribution  of  the  interests  in  the  new
                  partnership  to  the  transferee  Partner  and  the  remaining
                  Partners of the Partnership in liquidation of the Partnership.

         The foregoing  provisions  and the other  provisions of this  Agreement
relating to the  maintenance  of Capital  Accounts  are  intended to comply with
section  1.704-1(b) of the Regulations and shall be interpreted and applied in a
manner consistent with such Regulations. If a Super-Majority Interest determines
that it is prudent to modify the manner in which the  Capital  Accounts,  or any
increases or decreases to the Capital Accounts,  are computed in order to comply
with such  Regulations,  the General  Partner may authorize such  modifications,
provided  that  it is not  likely  to  have a  material  effect  on the  amounts
distributable  to any Person  pursuant to Section 13.3 upon the  dissolution and
liquidation of the Partnership.

                  (b)  Definition of Profits and Losses.  "Profits" and "Losses"
         mean,  for each fiscal  year or other  period,  an amount  equal to the
         Partnership's   taxable  income  or  loss  for  such  year  or  period,
         determined  in accordance  with Code section  703(a) (for this purpose,
         all items of income,  gain,  loss or  deduction  required  to be stated
         separately  pursuant  to Code  section  703(a)(1)  shall be included in
         taxable income or loss), with the following adjustments:

                           (i)  Income of the  Partnership  that is exempt  from
                  federal  income tax and not  otherwise  taken into  account in
                  computing  Profits and Losses  pursuant to this Section 4.5(b)
                  shall be added to such taxable income or loss.

                           (ii) Any expenditures of the Partnership described in
                  Code  section   705(a)(2)(B),   or  treated  as  Code  section
                  705(a)(2)(B)      expenditures     pursuant     to     section
                  1.704-1(b)(2)(iv)(i)  of the  Regulations,  and not  otherwise
                  taken into account in computing Profits and Losses pursuant to
                  this Section  4.5(b),  shall be  subtracted  from such taxable
                  income or loss.

                           (iii) If the Book Value of any  partnership  asset is
                  adjusted   pursuant   to   Section   4.5(c)(ii)   or   Section
                  4.5(c)(iii), the amount of such adjustment shall be taken into
                  account as gain or loss from the disposition of such asset for
                  purposes of computing Profits and Losses.

                           (iv) Gain or loss resulting  from any  disposition of
                  property with respect to which gain or loss is recognized  for
                  federal  income tax purposes shall be computed by reference to
                  the Book Value of the property  disposed  of,  notwithstanding
                  that the adjusted tax basis of such property  differs from its
                  Book Value.


<PAGE>

                           (v) In lieu of the deduction for  depreciation,  cost
                  recovery or amortization  taken into account in computing such
                  taxable income or loss, there shall be taken into account Book
                  Depreciation  as  defined  in this  Section  4.5(b)(v).  "Book
                  Depreciation" for any asset means for any fiscal year or other
                  period an amount  that  bears the same ratio to the Book Value
                  of that asset at the  beginning  of such  fiscal year or other
                  period as the federal income tax depreciation, amortization or
                  other cost  recovery  deduction  allowable  for that asset for
                  such year or other  period  bears to the adjusted tax basis of
                  that asset at the beginning of such year or other  period.  If
                  the federal  income tax  depreciation,  amortization  or other
                  cost recovery deduction  allowable for any asset for such year
                  or other period is zero, then Book Depreciation for that asset
                  shall be  determined  with  reference to such  beginning  Book
                  Value  using any  reasonable  method  selected  by the General
                  Partner and approved by a Super-Majority Interest.

                           (vi)  Notwithstanding  any  other  provision  of this
                  Section  4.5(b),  any  items  that  are  specially   allocated
                  pursuant to Section 5.2 or Section 5.3 shall not be taken into
                  account in computing Profits and Losses.

                  (c) Definition of Book Value. "Book Value" means for any asset
         the asset's adjusted basis for federal income tax  purposes, except  as
         follows:

                           (i) The initial  Book Value of any asset  contributed
                  by a Partner to the Partnership shall be the gross fair market
                  value of such asset,  as determined by the General Partner and
                  approved by a Super-Majority Interest.

                           (ii) The Book Values of all Partnership  assets shall
                  be  adjusted  to equal  their  respective  gross  fair  market
                  values, as determined by the General Partner and approved by a
                  Super-Majority Interest, as of the following times: (A) on the
                  acquisition  of an additional  interest in the  Partnership by
                  any new or  existing  Partner in  exchange  for more than a de
                  minimis capital contribution if the General Partner reasonably
                  determines that such adjustment is necessary or appropriate to
                  reflect the relative economic interests of the Partners in the
                  Partnership;  (B) on the  distribution by the Partnership to a
                  Partner  of  more  than a de  minimis  amount  of  Partnership
                  property as  consideration  for an interest in the Partnership
                  if  the  General  Partner  reasonably   determines  that  such
                  adjustment is necessary or appropriate to reflect the relative
                  economic interests of the Partners in the Partnership; and (C)
                  on the  liquidation of the  Partnership  within the meaning of
                  section 1.704-1(b)(2)(ii)(g) of the Regulations.

<PAGE>


                           (iii)  The  Book  Value  of  any  Partnership   asset
                  distributed  to any  Partner  shall be the gross  fair  market
                  value of such asset on the date of distribution.

                           (iv) The Book Values of  Partnership  assets shall be
                  increased  (or  decreased)  to reflect any  adjustment  to the
                  adjusted basis of such assets  pursuant to Code section 734(b)
                  or Code  section  743(b),  but only to the  extent  that  such
                  adjustments  are taken  into  account in  determining  Capital
                  Accounts  pursuant  to  section  1.704-1(b)(2)(iv)(m)  of  the
                  Regulations and Section 5.2(d);  provided,  however, that Book
                  Values  shall  not  be  adjusted   pursuant  to  this  Section
                  4.5(c)(iv) to the extent the General  Partner  determines that
                  an adjustment  pursuant to Section  4.5(c)(ii) is necessary or
                  appropriate  in  connection  with  a  transaction  that  would
                  otherwise  result in an  adjustment  pursuant to this  Section
                  4.6(c)(iv).

                           (v) If the Book Value of an asset has been determined
                  or adjusted  pursuant  to Section  4.5(c)(i),  4.5(c)(ii),  or
                  4.5(c)(iv),  such Book Value shall  thereafter  be adjusted by
                  the Book Depreciation  taken into account with respect to such
                  asset for purposes of computing Profits and Losses.

         4.6 Negative Capital Accounts.  If any Partner has a deficit balance in
its Capital  Account,  such  Partner  shall have no  obligation  to restore such
negative  balance or to make any  Capital  Contribution  to the  Partnership  by
reason  thereof,  and such negative  balance shall not be considered an asset of
the Partnership or of any Partner.

         4.7  Interest.  No interest shall be paid by the Partnership on Capital
Contributions or on balances in Capital Accounts.

         4.8  No Withdrawal.  No Partner shall be entitled to withdraw any  part
of  its  Capital   Contribution  or  its  Capital  Account  or  to  receive  any
distribution from the Partnership, except as provided in Section 6.1 and Article
XIII.

         4.9 Loans From Partners.  Except as provided in  Section 4.3(c),  loans
by a Partner to the Partnership shall not be considered Capital Contributions.

                                    ARTICLE V

                                   ALLOCATIONS

         5.1  Allocations of Profits and Losses.

               (a)  Allocation of Profit  Generally.  After giving effect to the
          allocations set forth in Section 5.2 and Section 5.3,  Profits for any
          Fiscal  Year  shall be  allocated  to the  Partners  in the  following
          manner:

                           (i) First, to each Partner with a negative balance in
                  its Adjusted Capital Account, pro rata in accordance with such
                  negative  Adjusted  Capital  Account   balances,   until  such
                  negative   Adjusted   Capital   Account   balances  have  been
                  eliminated;

                           (ii) Next, to LDE in the minimum amount  necessary to
                  cause LDE positive  Adjusted  Capital Account balance to equal
                  its accrued but unpaid Undistributed Priority Return;

                           (iii) Next,  to the  Partners  in the minimum  amount
                  necessary to cause the ratios among their "Excess  Amounts" to
                  equal the ratios among their  Composite  Sharing  Ratios.  For
                  purposes of this  Agreement,  LDE's "Excess Amount" equals the
                  positive balance in LDE's Capital Account  (computed after the
                  allocation of Profits under subparagraphs (i) and (ii) of this
                  Section 5.1(a) for the Fiscal Year of the allocation), reduced
                  by the sum of LDE's Undistributed  Priority Return (with LDE's
                  Undistributed  Priority  Return  being  computed  after giving
                  effect to all Capital Contributions and all distributions that
                  took place  during and before the Fiscal Year with  respect to
                  which the  allocation  is being made),  and  PHYMED's  "Excess
                  Amount"  equals  the  positive  balance  in  PHYMED's  Capital
                  Account; and


<PAGE>

                           (iv) Next, to  the  Partners in  proportion to  their
                  Composite Sharing Ratios.

                  (b)  Allocation of Losses.


                           (i) After giving effect to the  allocations set forth
                  in Section 5.2 and Section 5.3, and subject to the  limitation
                  set forth in Section  5.1(b)(ii),  Losses for any Fiscal  Year
                  shall be allocated to the Partners in the following manner:

                                    (A)  First,  in  circumstances  in which all
                           Partners  have  positive  Excess   Amounts,   to  the
                           Partners in the minimum  amounts  necessary  to cause
                           their  positive  Excess  Amounts  to be in  the  same
                           ratios  as  their   Percentage   Interests,   and  in
                           circumstances in which one or more Partners,  but not
                           all Partners,  have positive Excess  Amounts,  to the
                           Partners with positive  Excess Amounts in the minimum
                           amounts  necessary to cause such  Partners'  positive
                           Excess  Amounts  to be in the  same  ratios  as their
                           Percentage Interests;

                                    (B)  Next,  to the  Partners  with  positive
                           Excess  Amounts  pro rata in  accordance  with  their
                           positive Excess  Amounts,  until such positive Excess
                           Amounts have been eliminated;

                                    (C)  Next,  to  LDE in  the  minimum  amount
                           necessary  to  cause  each  such  Partner's  positive
                           Adjusted  Capital Account balance to equal the sum of
                           such Partner's Undistributed Priority Return; and

                                    (D) Next,  to the Partners in  proportion to
                           their Composite Sharing Ratios.

                           (ii)   Notwithstanding anything to the contrary in
                  Section 5.1(b)(i):

                                    (A)  Except as set forth  below,  the Losses
                           allocated pursuant to Section 5.1(b)(i) hereof to any
                           Partner  for any  Fiscal  Year  shall not  exceed the
                           maximum  amount of Losses  that may be  allocated  to
                           such Partner  without causing such Partner to have an
                           Adjusted  Capital  Account Deficit at the end of such
                           Fiscal Year.

                                    (B) If  some  but  not  all of the  Partners
                           would have an Adjusted  Capital  Account Deficit as a
                           consequence  of an allocation  of Losses  pursuant to
                           Section 5.1(b)(i)  hereof,  the limitations set forth
                           in  this  Section  5.1(b)(ii)  shall  be  applied  by
                           allocating Losses pursuant to this Section 5.1(b)(ii)
                           only to those Partners who would not have an Adjusted
                           Capital Account Deficit as a consequence of receiving
                           such an allocation of Losses (with the  allocation of
                           such Losses among such  Partners to be  determined by
                           the General Partner,  based on the allocation that is
                           most likely to effectuate the distribution priorities
                           set forth in Section 6.1 hereof).

<PAGE>


                                    (C) If no Partner may receive an  additional
                           allocation    of   Losses    pursuant    to   Section
                           5.1(b)(ii)(B)   above,  such  additional  Losses  not
                           allocated pursuant to Section  5.1(b)(ii)(B) shall be
                           allocated among the Partners in a manner that is most
                           likely to effectuate the distribution  priorities set
                           forth in Section 6.1  hereof,  as  determined  by the
                           General Partner.

         5.2      Special Allocations of Profits and Losses.

                  (a)   Minimum   Gain    Chargeback--Partnership    Nonrecourse
         Liabilities.  If there is a net  decrease in  Partnership  Minimum Gain
         during any Partnership  taxable year,  certain items of income and gain
         shall be  allocated  (on a gross  basis) to the Partners in the amounts
         and manner  described in section  1.704-2(f) and (j)(2)(i) and (iii) of
         the  Regulations,  subject  to the  exemptions  set  forth  in  section
         1.704-2(f)(2),  (3),  (4),  and (5) of the  Regulations.  This  Section
         5.2(a)  is  intended  to  comply  with  the  minimum  gain   chargeback
         requirement  (set  forth  in  section  1.704-2(f)  of the  Regulations)
         relating to Partnership  nonrecourse liabilities (as defined in section
         1.704-2(b)(3) of the Regulations) and shall be so interpreted.

                  (b) Minimum  Gain  Chargeback--Partner  Nonrecourse  Debt.  If
         there is a net decrease in Partner  Minimum Gain during any Partnership
         taxable year, certain items of income and gain shall be allocated (on a
         gross  basis) as quickly as possible to those  Partners who had a share
         of  the  Partner   Minimum   Gain   (determined   pursuant  to  section
         1.704-2(i)(5)  of the  Regulations) in the amounts and manner described
         in section 1.704-2(i)(4), (j)(2)(ii) and (iii) of the Regulations. This
         Section  5.2(b) is intended to comply with the minimum gain  chargeback
         requirement  (set forth in section  1.704-2(i)(4)  of the  Regulations)
         relating   to  partner   nonrecourse   debt  (as   defined  in  section
         1.704-2(b)(4) of the Regulations) and shall be so interpreted.

                  (c) Qualified Income Offset. If, after applying Section 5.2(a)
         and  Section  5.2(b),  any  Partner  has an  Adjusted  Capital  Account
         Deficit,  items  of  Partnership  income  and gain  shall be  specially
         allocated  (on a gross  basis) to each such  Partner  in an amount  and
         manner  sufficient to eliminate the Adjusted Capital Account Deficit of
         such Partner as quickly as possible. This Section 5.2(c) is intended to
         comply with the  "qualified  income  offset"  requirement  set forth in
         section  1.704-1(b)(2)(ii)(d)  of  the  Regulations  and  shall  be  so
         interpreted.

                  (d) Basis Adjustments.  To the extent an adjustment to the tax
         basis of any Partnership  asset pursuant to section 734(b) or 743(b) of
         the Code is required,  pursuant to section  1.704-1(b)(2)(iv)(m) of the
         Regulations,  to be taken into account in determining Capital Accounts,
         the amount of such adjustment to the Capital  Accounts shall be treated
         as an item of gain (if the adjustment increases the basis of the asset)
         or loss (if the adjustment decreases such basis), and such gain or loss
         shall be specially  allocated  to the  Partners in a manner  consistent
         with the manner in which  their  Capital  Accounts  are  required to be
         adjusted pursuant to such section of the Regulations.

                  (e)    Nonrecourse Deductions.  Nonrecourse Deductions for any
         fiscal  year  shall  be  specially  allocated  among  the  Partners  in
         proportion to their Percentage Interests.

                  (f)     Partner  Nonrecourse  Deductions.  Partner Nonrecourse
         Deductions shall be allocated  pursuant to section  1.704-2(b)(4)  and
         (i)(1) of the  Regulations  to the Partner who bears the economic risk
         of loss with respect to such deductions.

<PAGE>


         5.3 Curative  Allocations.  The allocations set forth in Section 5.1(b)
and Section 5.2(a) through  Section 5.2(f) (the  "Regulatory  Allocations")  are
intended to comply  with  certain  requirements  of the  Regulations.  It is the
intent of the Partners that, to the extent possible,  all Regulatory Allocations
shall be  offset  either  with  other  Regulatory  Allocations  or with  special
allocations  of other items of  Partnership  income,  gain,  loss,  or deduction
pursuant to this Section 5.3. Therefore, notwithstanding any other provisions of
this  Article V (other than the  Regulatory  Allocations),  the General  Partner
shall make such  offsetting  special  allocations of Partnership  income,  gain,
loss, or deduction in whatever manner it determines  appropriate so that,  after
such offsetting allocations are made, each Partner's Capital Account balance is,
to the extent possible,  equal to the Capital Account balance such Partner would
have had if the  Regulatory  Allocations  were not part of the Agreement and all
Partnership  items were allocated  pursuant to Section 5.1(a). In exercising its
discretion  under this Section 5.3, the General  Partner shall take into account
future Regulatory  Allocations  under Sections 5.2(a) and 5.2(b) that,  although
not yet made, are likely to offset other Regulatory  Allocations previously made
under Sections 5.2(e) and 5.2(f).

         5.4      Tax Allocations:  Code Section 704(c).

                  (a) In accordance with Code section 704(c) and the Regulations
         thereunder,  income,  gain,  loss,  and  deduction  with respect to any
         property  contributed to the capital of the Partnership  shall,  solely
         for tax purposes, be allocated among the Partners so as to take account
         of any  variation  between the adjusted  basis of such  property to the
         Partnership  for federal income tax purposes and its initial Book Value
         (computed in accordance with Section 4.4(c)(i)).

                  (b) If the Book  Value of any  Partnership  asset is  adjusted
         pursuant to Section 4.4(c)(ii), subsequent allocations of income, gain,
         loss and deduction with respect to such asset shall take account of any
         variation  between the adjusted  basis of such asset for federal income
         tax  purposes  and its  Book  Value in the same  manner  as under  Code
         section 704(c) and the Regulations thereunder.

                  (c) Any elections or other  decisions  relating to allocations
         made pursuant to this Section 5.4 shall be made by the General  Partner
         in any manner that reasonably reflects the purpose and intention of the
         Agreement.  Allocations  pursuant  to this  Section  5.4 are solely for
         purposes of federal,  state, and local taxes and shall not affect or in
         any way be taken  into  account  in  computing  any  Partner's  Capital
         Account or share of Profits,  Losses,  and other items or distributions
         pursuant to any provision of this Agreement.

         5.5      Other Allocation Rules.

                  (a) For purposes of determining  the Profits,  Losses,  or any
         other item allocable to any period, Profits, Losses, and any such other
         item  shall be  determined  on a daily,  monthly,  or other  basis,  as
         determined by the General  Partner using any  permissible  method under
         section 706 of the Code and the Regulations thereunder.

                  (b) For  federal  income tax  purposes,  every item of income,
         gain,  loss,  and  deduction  shall be allocated  among the Partners in
         accordance with the  allocations  under Sections 5.1, 5.2, 5.3, and 5.4
         of this Agreement.

                  (c) The Partners are aware of the income tax  consequences  of
         the allocations  made by this Article V and hereby agree to be bound by
         the  provisions  of  this  Article  V  in  reporting  their  shares  of
         Partnership income and loss for income tax purposes.

                  (d) It is intended that the  allocations in Sections 5.1, 5.2,
         5.3,  and 5.4 effect an  allocation  for  federal  income tax  purposes
         consistent with section 704 of the Code and comply with any limitations
         or restrictions therein.

                  (e)  The  Partners  agree  that  their  Percentage   Interests
         represent  their  respective   interests  in  Partnership  profits  for
         purposes of allocating  excess  nonrecourse  liabilities (as defined in
         section   1.752-3(a)(3)  of  the   Regulations)   pursuant  to  section
         1.752-3(a)(3) of the Regulations.

<PAGE>


                                   ARTICLE VI

                                  DISTRIBUTIONS

         6.1  Distributions.  The General Partner shall review the Partnership's
accounts  promptly  after the end of each  calendar  month to determine  whether
there exists any Available Cash at such time. If there exists  Available Cash at
such time,  the General  Partner shall  promptly  distribute  all such Available
Cash.  Except to the extent  Section  13.3 or Section 13.4 are  applicable,  all
distributions  pursuant to this Section 6.1 shall be made to the Partners in the
manner set forth below:

               (a)  First,  to LDE to the  extent  LDE has  accrued  but  unpaid
          Undistributed  Priority  Return,  in an amount up to LDE's accrued but
          unpaid Undistributed Priority Return;

               (b) Next, 100% to PHYMED until the total  distributions to PHYMED
          under this  Section  6.1(b) equal the total UPR  Elimination  Payments
          since the Commencement Date; and

               (c) Next, to the Partners in  proportion to their Sharing  Ratios
          for the immediately preceding calendar month.

         6.2 Make-Up  Payments.  If, with respect to any calendar month, LDE has
accrued but unpaid Undistributed  Priority Return on the fifteenth day following
said calendar  month,  then PHYMED shall make a cash payment  directly to LDE no
later  than the  twentieth  day  following  said  calendar  month  in an  amount
necessary to eliminate LDE's  Undistributed  Priority Return (a "UPR Elimination
Payment").  If PHYMED does not make the UPR Elimination Payment (if due) in full
by the twentieth day following  each  relevant  calendar  month,  then LDE shall
notify PHYMED in writing of such  failure.  If PHYMED does not make the relevant
UPR Elimination  Payment in full within five Business Days following the written
notice from LDE  referred to in the  immediately  preceding  sentence,  then (a)
PHYMED  shall  continue  to have an  unconditional  obligation  to make  the UPR
Elimination  Payment (with  interest at the greater of (i) 15 percent per annum,
or (ii) the LDE Rate on the date of such default plus 800 basis points,  and (b)
PHYMED's Sharing Ratios for each calendar month after the date of failure to pay
the UPR  Elimination  Payment  shall be equal to 50 percent of what it otherwise
would  be,  and the  Sharing  Ratio of LDE  shall be equal to the sum of (i) the
Sharing  Ratio that it would have absent such  default by PHYMED,  plus (ii) the
amount of Sharing Ratio lost by PHYMED as a result of such default.

         6.3   Payments Not Deemed Distributions.  Any amounts paid pursuant  to
Section  7.4  shall  not  be  considered  distributions  for  purposes  of  this
Agreement.

         6.4      Withheld Amounts.

               (a) Notwithstanding any other provision of this Article VI to the
          contrary,  each Partner hereby  authorizes the Partnership to withhold
          and to pay over,  or  otherwise  pay, any  withholding  or other taxes
          payable by the Partnership with respect to such Partner as a result of
          such Partner's participation in the Partnership.  If and to the extent
          that the  Partnership  shall be  required  to withhold or pay any such
          taxes, such Partner shall be deemed for all purposes of this Agreement
          to have  received a payment from the  Partnership  as of the time such
          withholding  or tax is paid,  which  payment  shall be  deemed to be a
          distribution  with respect to such Partner's  Partnership  Interest to
          the  extent  that the  Partner  (or any  successor  to such  Partner's
          Partnership Interest) is then entitled to receive a distribution.

<PAGE>


               (b) To the  extent  that  the  aggregate  of such  payments  to a
          Partner for any period exceeds the distributions to which such Partner
          is  entitled  for such  period,  the  amount of such  excess  shall be
          considered  a loan from the  Partnership  to such  Partner.  Such loan
          shall bear  interest  (which  interest  shall be treated as an item of
          income to the Partnership) at the lesser of the maximum rate permitted
          by law or the LDE Rate,  as  determined  hereunder  from time to time,
          until  discharged by such Partner by  repayment,  which may be made in
          the sole  discretion of the General  Partner out of  distributions  to
          which such Partner would otherwise be subsequently entitled.

               c) Any withholdings  authorized by this Section 6.4 shall be made
          at the  applicable  statutory rate under the applicable tax law unless
          the General Partner shall have received an opinion of counsel or other
          evidence  satisfactory  to the  General  Partner to the effect  that a
          lower rate is applicable, or that no withholding is applicable.

                                   ARTICLE VII

                          MANAGEMENT OF THE PARTNERSHIP

         7.1  Designation and Authority of General Partner.

               (a) The Partners hereby  designate  PHYMED as the general partner
          of the  Partnership.  PHYMED  shall  continue  to serve as the General
          Partner  of  the  Partnership  until  such  time  as  provided  in the
          Agreement.

               (b) Subject to Section 7.2, the General  Partner  shall  conduct,
          direct,   and  exercise  full  control  over  all  activities  of  the
          Partnership and all management powers over the business and affairs of
          the Partnership shall be vested in the General Partner.

         7.2  Major Decisions.  The General Partner shall not have the authority
to cause the Partnership to act on any matter  constituting a Major Decision (or
which otherwise  requires the approval of a  Super-Majority  Interest) until the
General Partner obtains the written approval of a Super-Majority  Interest.  The
term "Major Decision," as used in this Agreement means any decision with respect
to the following matters:

               (a)  approval  of  any  contract  between  any  Partner  (or  any
          Affiliate of any Partner) and the Partnership;

               (b) doing any act in contravention of the Agreement or failing to
          do any act required by the Agreement;

               (c) doing any act which would make it  impossible to carry on the
          ordinary business of the Partnership;

               (d) executing or  delivering  any  assignment  for the benefit of
          creditors of the Company;

               (e) moving the MRI to any location other than the Center;

               (f) engaging in any material activity not related to operation of
          the MRI;

               (g) selling,  exchanging,  leasing or otherwise  transferring any
          single asset of the Partnership  with a fair market value in excess of
          $1,000;


<PAGE>

               (h)  acquiring  any single asset of the  Partnership  with a fair
          market value in excess of $1,000;

               (i) placing any voluntary  liens or  encumbrances  on Partnership
          assets;

               (j)  entering  into  any  contract,   including  any   employment
          contract;

               (k)  borrowing any money by the  Partnership  in excess of $1,000
          (other than trade  payables and  liabilities  incurred in the ordinary
          course of business);

               (l) confessing any judgment against the Partnership in connection
          with any threatened or pending legal action;

               (m)  settling   any  claim  in  excess  of  $1,000   against  the
          Partnership;

               (n)  making  any   material   decision   concerning   Partnership
          accounting  for book and  federal  income tax  purposes  or making any
          significant election for federal income tax purposes;

               (o) making the  decision to institute  any lawsuit and  selecting
          the attorneys to prosecute such a lawsuit;

               (p) filing any voluntary  petition in bankruptcy or  receivership
          with respect to the Partnership;

               (q) lending any funds of the  Partnership  other than the deposit
          of Partnership funds in a federally insured institution;

               (r)  making  any  other   decision   under  this  Agreement  that
          specifically requires the approval of a Super-Majority Interest; and

               (s) obtaining any insurance coverage.

         7.3  Certificate of Limited  Partnership.  The  General  Partner  shall
file the  Certificate  with the  Secretary  of State of the State of Texas,  and
shall cause to be filed such other certificates or documents (including, without
limitation,  copies,  amendments,  or restatements of the Certificate) as may be
determined by the General  Partner to be reasonable and necessary or appropriate
for the formation,  qualification,  or  registration  and operation of a limited
partnership  (or a  partnership  in which  the  Limited  Partners  have  limited
liability)  in the State of Texas and in any other state  where the  Partnership
may elect to do business.

         7.4  Compensation and  Reimbursement of  General Partner.  The  General
Partner shall not be compensated  for services  rendered to the Partnership as a
General Partner.  However,  the Partnership  shall reimburse the General Partner
for all  reasonable  expenses  incurred by the General  Partner on behalf of the
Partnership and/or for the benefit of the Partnership.

         7.5 Partnership Funds.  The funds of the Partnership shall be deposited
in such  interest-bearing  Partnership  account or  Partnership  accounts as are
designated by the General Partner.  All withdrawals from or charges against such
accounts shall be made by the General Partner or by its representative. Funds of
the  Partnership  may be  invested  as  determined  by the  General  Partner  in
accordance with the terms and provisions of this Agreement.


<PAGE>

         7.6  Duties.  The General  Partner shall manage the Partnership and its
business and affairs in accordance  with the terms of this Agreement to the best
of its ability,  and shall use its good faith  efforts to carry out the business
of the Partnership. The General Partner shall act honestly, in good faith and in
the best interest of the Partnership. The General Partner shall devote itself to
the business of the  Partnership  to the extent that it  determines is necessary
for the efficient carrying on thereof.

         7.7  Transactions  with Affiliates.  The General  Partner  may not,  on
behalf of the  Partnership,  enter into any  transaction,  agreement or contract
with a Partner or with any Person that is an Affiliate of any Partner and/or the
Partnership  unless  the  terms  to the  Partnership  of any  such  transaction,
agreement,  or contract  involving  the  Partnership  with a Partner or with any
Affiliate of a Partner  and/or the  Partnership  shall be  competitive  with the
terms of similar transactions,  agreements,  or contracts obtained by persons in
the same business as the  Partnership in arms-length  agreements  with unrelated
parties.

         7.8  Outside Activities; Conflicts of Interest.  The General Partner or
any  Affiliate  thereof  and  any  director,   officer,   employee,   agent,  or
representative of the General Partner or any Affiliate thereof shall be entitled
to and may have business interests and engage in business activities in addition
to  those  relating  to  the  Partnership,   including  business  interests  and
activities  in the same  business as the  Partnership,  except that  neither the
General  Partner  nor any  Affiliate  shall be  entitled  to open an MRI imaging
center or have any interest in an MRI imaging  center at any  location  within a
10-mile radius of the Center.  Neither the  Partnership  nor any of the Partners
shall  have  any  rights  by  virtue  of  this  Agreement  or  the   partnership
relationship created hereby in any business ventures of the General Partner, any
Affiliate thereof, or any director,  officer, employee, agent, or representative
of either the General Partner or any Affiliate thereof.

         7.9  Resolution of  Conflicts of  Interest.  Unless otherwise expressly
provided in this Agreement or any other agreement contemplated herein,  whenever
a conflict of interest  exists or arises  between the General  Partner or any of
its Affiliates,  on the one hand, and the Partnership or any Limited Partner, on
the other hand, any action taken by the General  Partner,  in the absence of bad
faith by the General Partner, shall not constitute a breach of this Agreement or
any other agreement  contemplated  herein or a breach of any standard of care or
duty  imposed  herein or therein or under the Texas Act or any other  applicable
law, rule, or regulation.

         7.10  Indemnification.  The   Partnership  shall  indemnify  and   hold
harmless the General  Partner and any director,  officer,  employee,  agent,  or
representative  of the General  Partner,  against all liabilities,  losses,  and
damages  incurred by any of them by reason of any act performed or omitted to be
performed in the name of or on behalf of the Partnership,  or in connection with
the Partnership's  business,  including attorneys' fees and any amounts expended
in the  settlement  of any claims or  liabilities,  losses,  or damages,  to the
fullest extent  permitted by the Texas Act  (excluding,  however,  any losses or
damages  resulting  from the General  Partner's  negligence,  gross  negligence,
fraud, willful misconduct,  or breach of this Agreement).  The Partnership shall
indemnify  and  hold  harmless  any  Limited   Partner,   employee,   agent,  or
representative  of the  Partnership,  any  Person  who is or was  serving at the
request of the  Partnership  acting  through the General  Partner as a director,
officer,  partner,  trustee,  employee,  agent,  or  representative  of  another
corporation,  partnership,  joint venture, trust, or other enterprise, but in no
event shall such  indemnification  exceed the  indemnification  permitted by the
Texas Act.  Notwithstanding anything to the contrary in this Section 7.10, in no
event shall Limited  Partners be subject to personal  liability by reason of the
indemnification provisions of this Agreement.

<PAGE>


         7.11  Liability of General Partner.

                  (a) Neither the General  Partner nor its directors,  officers,
         employees,   agents,  or   representatives   shall  be  liable  to  the
         Partnership  or any  Limited  Partner for errors in judgment or for any
         acts or omissions that do not constitute negligence,  gross negligence,
         fraud, willful or wanton misconduct or breach of this Agreement.

                  (b) The General Partner may exercise any of the powers granted
         to it by this  Agreement and perform any of the duties  imposed upon it
         hereunder  either  directly or by or through its  directors,  officers,
         employees, agents, or representatives.

         7.12  Reliance by General Partner.

                  (a) The  General  Partner may rely and shall be  protected  in
         acting or  refraining  from  acting upon any  resolution,  certificate,
         statement,  instrument,  opinion,  report,  notice,  request,  consent,
         order, bond, debenture, or other paper or document believed by it to be
         genuine and to have been  signed or  presented  by the proper  party or
         parties.

                  (b) The  General  Partner  may  consult  with  legal  counsel,
         accountants,  appraisers,  management consultants,  investment bankers,
         and other  consultants and advisers  selected by it, and any opinion of
         any such Person as to matters which the General Partner  believes to be
         within such Person's  professional or expert  competence  shall be full
         and  complete  authorization  and  protection  in respect of any action
         taken or suffered or omitted by the General  Partner  hereunder in good
         faith and in accordance with such opinion.

         7.13  Insurance.  The  General  Partner,  on  behalf of the Partnership
and at the Partnership's cost and expense, shall, during the entire term hereof,
obtain,  maintain and keep in full force and effect,  such insurance coverage as
the General Partner reasonably deems advisable, subject to Section 7.2.

                                  ARTICLE VIII

                   RIGHTS AND OBLIGATIONS OF LIMITED PARTNERS

         8.1 Limitation of Liability.  A Limited Partner shall have no liability
under this Agreement except as provided herein or under the Texas Act.

         8.2  Management  of Business. No Limited Partner shall take part in the
control  (within  the meaning of the Texas Act) of the  Partnership's  business,
transact  any  business  in the  Partnership's  name,  or have the power to sign
documents for or otherwise bind the Partnership  other than as specifically  set
forth in this Agreement.

         8.3 Outside  Activities.  A Limited Partner or  any  Affiliate thereof,
and any director,  officer,  employee,  agent, or representative of such Limited
Partner or any  Affiliate  thereof,  shall be entitled to and may have  business
interests and engage in business activities in addition to those relating to the
Partnership,  including  business interests and activities in direct competition
with the  Partnership.  Neither the  Partnership  nor any of the other  Partners
shall have any rights by virtue of this  Agreement in any  business  ventures of
any Limited Partner, any Affiliate thereof, or any director,  officer, employee,
agent, or representative of any Limited Partner or any Affiliate thereof.

         8.4  Return  of Capital.  No Limited Partner  shall be  entitled to the
withdrawal or return of its Capital  Contribution  except to the extent, if any,
that  distributions  made pursuant to this Agreement or upon  termination of the
Partnership  may be  considered  as  such  by law and  then  only to the  extent
provided for in this Agreement.

<PAGE>

                                   ARTICLE IX

                     BOOKS, RECORDS, ACCOUNTING AND REPORTS

         9.1  Records and Accounting.  The General Partner  shall  keep or cause
to be kept  appropriate  books and  records  with  respect to the  Partnership's
business,  which  shall at all  times  be kept at the  principal  office  of the
Partnership  or such other office as the General  Partner may designate for such
purposes.  Any books and records  maintained by the  Partnership  in the regular
course of its business,  including  books of account and records of  Partnership
proceedings,  may be kept on any information  storage device,  provided that the
books and records so kept are  convertible  into  clearly  legible  written form
within a  reasonable  period  of time.  The  books of the  Partnership  shall be
maintained for financial reporting purposes on the accrual method of accounting.

         9.2  Fiscal Year.  The  fiscal  year of  the  Partnership shall  be the
 calendar year for tax and accounting purposes.

         9.3  Reports.

                  (a) The General Partner shall deliver to each Partner,  at the
         Partnership's expense, not later than 90 days following the end of each
         fiscal  year,  a  balance  sheet,  an income  statement,  and an annual
         statement of source and  application  of funds of the  Partnership  for
         such fiscal  year.  Upon the  request of any  Partner,  such  financial
         statements shall be audited by an independent  accounting firm selected
         by the  requesting  Partner,  with the  Partner  requesting  such audit
         paying the entire cost of the audit.

                  (b) The General Partner shall deliver to each Partner,  at the
         Partnership's  expense,  not later  than 45 days  after the last day of
         each calendar quarter during the term of this Agreement, other than the
         last calendar  quarter of the fiscal year in question,  a balance sheet
         together with a profit and loss  statement  for such  calendar  quarter
         together with a cumulative  profit and loss  statement to date and with
         comparative statements for the like periods immediately preceding.

                  (c) Within  twenty days  following  each calendar  month,  the
         General  Partner shall deliver to each Partner a written report setting
         forth:  (i)  the  Sharing  Ratio  applicable  to each  Partner  for the
         immediately  preceding month, (ii) the Composite Sharing Ratio for each
         Partner  as of the  end  of  the  immediately  preceding  month,  (iii)
         distributions  for the immediately  preceding month,  setting forth the
         amount  distributed to each Partner under each of Sections 6.1(a),  (b)
         and (c), (iv) LDE's Undistributed  Priority Return as of the end of the
         immediately  preceding  month,  (v) UPR  Elimination  Payments  for the
         immediately  preceding month, and (vi) the maximum amount that could be
         distributed in the upcoming month under Section 6.1(b).

                                    ARTICLE X

                                   TAX MATTERS

         10.1  Preparation of Tax Returns. The General Partner shall arrange for
the preparation and timely filing of all returns of Partnership  income,  gains,
deductions, losses and other items necessary for federal, state and local income
tax purposes. The classification,  realization and recognition of income, gains,
losses and  deductions and other items shall be on the cash or accrual method of
accounting  for  federal  income tax  purposes,  as the  General  Partner  shall
determine in accordance  with  applicable  law. The General  Partner in its sole
discretion  may pay state and local income taxes  attributable  to operations of
the Partnership and treat such taxes as an expense of the Partnership.

<PAGE>


         10.2  Tax Elections.  Except as otherwise  provided herein, the General
Partner  shall  determine  whether  to  make  any  election   available  to  the
Partnership under the Code.

         10.3  Tax  Controversies.  Subject to  the provisions hereof, PHYMED is
designated  the "tax matters  partner" (as defined in section 6231 of the Code),
and  is  authorized   and  required  to  represent  the   Partnership,   at  the
Partnership's  expense, in connection with all examinations of the Partnership's
affairs by tax  authorities,  including  resulting  administrative  and judicial
proceedings, and to expend Partnership funds for professional services and costs
associated therewith. Each Partner agrees to cooperate with PHYMED in connection
with such proceedings.

         10.4  Organizational Expenses.  The Partnership  shall elect  to deduct
expenses  incurred in organizing the Partnership  ratably over a 60-month period
as provided in section 709 of the Code.

         10.5   Taxation  as  a  Partnership.  No election  shall be made by the
Partnership  or  any  Partner  for  the  Partnership  to be  excluded  from  the
application of any of the provisions of Subchapter K, Chapter 1 of Subtitle A of
the Code or from any similar provisions of any state tax laws.

                                   ARTICLE XI

                       TRANSFERS OF PARTNERSHIP INTERESTS

         11.1  Transfer   Restrictions.   No  Partnership  Interest   shall   be
transferred,  in whole or in part,  except  in  accordance  with the  terms  and
conditions  set forth in this Article XI. Any transfer or purported  transfer of
any  Partnership  Interest not made in accordance  with this Article XI shall be
null and  void.  An  alleged  transferee  shall  have no right  to  require  any
information  or  account of the  Partnership's  transactions  or to inspect  the
Partnership's  books.  The  Partnership  shall be  entitled to treat the alleged
transferor  of a  Partnership  Interest  as the  absolute  owner  thereof in all
respects,   and  shall  incur  no  liability  to  any  alleged   transferee  for
distributions to the Partner owning such  Partnership  Interest of record or for
allocations of income, gain, losses, deductions or credits or for transmittal of
reports and notices  required to be given to holders of  Partnership  Interests.
The term  "transfer"  when used in this Article XI with respect to a Partnership
Interest, includes a sale, assignment, gift, pledge, encumbrance, hypothecation,
mortgage, exchange, or any other disposition.

         11.2  Transfers  by General Partner.  The  General Partner may transfer
all, but not less than all, of its Partnership Interest to any Person only after
first obtaining the approval of a Super-Majority Interest, which approval may be
unreasonably  withheld.  Any  permitted  transfer by the General  Partner of its
Partnership  Interest  under this Section 11.2 shall not constitute a withdrawal
of the  General  Partner  under  Article  XII,  Section  13.1(b),  or any  other
provision  of this  Agreement.  If any such  transfer is deemed to  constitute a
withdrawal  under such provisions or otherwise and results in the dissolution of
the  Partnership  under this Agreement or the laws of any  jurisdiction to which
the Partnership or this Agreement is subject,  the Partners  hereby  unanimously
consent to the  reconstitution  and continuation of the Partnership  immediately
following such dissolution, pursuant to Section 13.2.

         11.3  ransfers by Limited Partners. Except as provided in Section 11.4,
a Partnership Interest of a Limited Partner may be transferred at any time.

<PAGE>


         11.4  Additional  Limitations  on  Transfers  of Partnership Interests.
The  General  Partner (or the  Limited  Partners  if the General  Partner is the
transferor)  may  require,  as a  condition  to any  transfer  of a  Partnership
Interest  of a Limited  Partner,  that,  in the  General  Partner's  (or Limited
Partners,  if applicable)  reasonable  determination:  (a) the transfer will not
jeopardize the treatment of the  Partnership as a partnership for federal income
tax purposes;  (b) the transfer will not result in or cause a termination of the
Partnership  for federal  income tax  purposes;  and (c) the  transfer  will not
violate the registration requirements of applicable securities laws or cause any
prior offer and sale of Partnership Interests to violate such requirements.  The
General  Partner (or  Limited  Partners,  if  applicable)  may also  require the
proposed transferee to deliver to the Partnership acceptable representations and
warranties  respecting  its  status  under  applicable  securities  laws and its
investment intent with respect to the Partnership Interest,  and may require the
transferor  and  transferee  to supply such other  documentation  as the General
Partner (or Limited  Partners,  if  applicable)  may deem  advisable in its sole
discretion.

         11.5  Distributions  and  Allocations   in   Respect   of   Transferred
Partnership  Interests.  If any Partnership  Interest is transferred  during any
fiscal year in  compliance  with the  provisions  of this  Article XI,  Profits,
Losses,  and all other items  attributable to the transferred  interest for such
period shall be divided and allocated  between the transferor and the transferee
by taking into account their varying  interests  during the period in accordance
with Code  Section  706(d),  using  any  conventions  permitted  by law that are
reasonably selected by the General Partner.

         11.6 Admission of Initial and Substitute Limited Partners and Successor
 General Partner.


                  (a) Admission of Initial  Limited  Partners.  On the Effective
         Date, the General Partner shall admit LDE as the Limited Partner in the
         Partnership.  Each Limited  Partner shall execute this  Agreement (or a
         counterpart  thereof) and thereby agree to be bound by the terms hereof
         as Limited Partner.

                  (b) Admission of  Substitute  Limited  Partners.  A transferee
         (which may be the heir or legatee of a Limited  Partner) or assignee of
         a  Limited  Partner's  Partnership  Interest,  or  Person  acquiring  a
         Partnership   Interest  pursuant  to  any  foreclosure  made  upon  any
         permitted pledge or hypothecation of such Partnership  Interest,  shall
         be  entitled  to receive the  distributive  share of the  Partnership's
         Profits,  Losses,  income,  gains,  losses,   deductions,  and  credits
         attributable  to such  Partnership  Interest.  To  become a  substitute
         Limited  Partner,  the transferor  and the  transferee  must notify the
         General  Partner in  writing of such  transfer.  If  acceptable  to the
         General  Partner,  such  transferee,  assignee,  heir, or legatee shall
         execute a counterpart of this Agreement,  thereby  agreeing to be bound
         by  the  terms  hereof  as  a  Limited  Partner  with  respect  to  the
         Partnership  Interest so  transferred.  Upon  admission of a substitute
         Limited  Partner,  such Limited  Partner shall be subject to all of the
         restrictions applicable to, shall assume all of the obligations of, and
         shall attain the status of a Limited Partner under and pursuant to this
         Agreement with respect to the Partnership Interest held by such Limited
         Partner.

                  (c)  Admission  of  Successor  General  Partner.  A  permitted
         transferee  of or successor to all of the  Partnership  Interest of the
         General  Partner  pursuant  to Section  11.2 shall be  admitted  to the
         Partnership  as the General  Partner,  effective  as of the date of the
         withdrawal or removal of the predecessor General Partner or the date of
         transfer of such predecessor's Partnership Interest.

<PAGE>


                  (d)  Action  by  General  Partner.   In  connection  with  the
         admission  of any  substitute  Limited  Partner  or  successor  General
         Partner,  the General Partner shall have the authority to take all such
         actions as it deems necessary or advisable in connection therewith, and
         the execution and filing with appropriate  authorities of any necessary
         documentation.

         11.7  Prohibited  Transfers.   Any  transfer  or  purported   transfer,
whether by operation of law or  otherwise,  of a Partnership  Interest  shall be
null and void and of no legal  effect  unless it is permitted by this Article XI
or by other provisions of this Agreement.

         11.8  Specific Performance and Other Remedies.  It is  expressly agreed
that the  remedy  at law for  breach of any of the  obligations  to  transfer  a
Partnership  Interest  pursuant to this Article XI is inadequate in view of: (i)
the complexities and uncertainties in measuring the actual damages that would be
sustained  by reason of the  failure of a Partner  to comply  fully with each of
said  obligations,  and (ii) the uniqueness of the Partnership  business and the
Partnership  relationship.  Accordingly,  each of the aforesaid  obligations  to
transfer  a  Partnership  Interest  shall  be,  and is  hereby  expressly  made,
enforceable by specific performance.

         11.9  PHYMED Purchase Option.

                  (a) Purchase Option.  At any time after thirty-six months from
         the  Commencement  Date,  PHYMED or its Affiliate shall have the right,
         but not the obligation,  to purchase all, but not less than all, of the
         Partnership  Interests  held by LDE and its Affiliates for the Purchase
         Price on the date the relevant Option Notice is sent.

                  (b)  Option  Notice.  If PHYMED or its  Affiliate  desires  to
         exercise its option under Section 11.9(a), it shall give written notice
         (the  "Option  Notice") to LDE stating its  intention  to exercise  its
         option under Section 11.9(a) and a proposed calculation of the Purchase
         Price.  The date of the Option  Notice shall be the date such notice is
         deemed given or made pursuant to Section 15.1.

                  (c)  Calculation of Purchase Price.

                           (i) The "Purchase  Price" as of the date of an Option
                  Notice equals the greater of (A) $1,000, or (B) the excess (if
                  any) of (I) the future value of  $2,500,000  as of the date of
                  the  Option  Notice  (using a 15% per annum  interest  factor,
                  compounded monthly,  running from the Commencement Date to the
                  date of the Option Notice), over (II) the future value of each
                  distribution  to LDE under  Section  6.1  hereof  and each UPR
                  Elimination Payment as of the date of the Option Notice (using
                  a 15% per annum interest factor (compounded monthly),  running
                  from the date of  distribution  or  payment to the date of the
                  Option Notice).

                           (ii)The Purchase Price shall be paid entirely in cash
                  at closing.

                  (d) Disagreement With Purchase Price. If LDE or its Affiliates
         disagree with the proposed  calculation  of Purchase Price set forth in
         the  Option  Notice,  it shall  give  written  notice  to  PHYMED  (the
         "Purchase  Price  Notice") to that effect within fifteen (15) days from
         the date of the Option  Notice.  Such Purchase Price Notice shall state
         the specific grounds for disagreement and a new calculation of Purchase
         Price.  If the parties  cannot  agree upon the  Purchase  Price  within
         fifteen (15) days after the date of the Purchase Price Notice, then the
         parties shall submit the  calculation  of Purchase  Price to a mutually
         acceptable national independent  accounting firm. The fees and expenses
         of the  national  independent  accounting  firm  shall be shared by the
         parties equally.


<PAGE>

                  (c) Closing.  A Transfer  described in this Section 11.9 shall
         be  consummated  within  thirty  (30) days  after the date on which the
         Purchase Price is finally determined pursuant to Section 11.9(d), or if
         there is no disagreement regarding the proposed calculation of Purchase
         Price set forth in the Option  Notice,  then  within  thirty  (30) days
         after the date of the Option Notice.

                                   ARTICLE XII

                    WITHDRAWAL AND REMOVAL OF GENERAL PARTNER

         12.1  Events of Withdrawal.  The General Partner  may  not  voluntarily
withdraw from the Partnership at any time. The General Partner, however, will be
deemed to have  withdrawn  from the  Partnership on the occurrence of any one of
the  following   events  (each  event  herein   referred  to  as  an  "Event  of
Withdrawal"):

                  (a) The  General  Partner  is  removed  as  a  general partner
         pursuant to Section 12.2; or

                  (b) The General  Partner  transfers  all of its right,  title
         and interest as General Partner pursuant to Section

         12.2  Removal.

                  (a) A General Partner may be removed as General Partner at any
         time: (i) after such Person commits an act of fraud or gross negligence
         in its capacity as General  Partner;  (ii) after such Person  commits a
         material breach of this  Agreement;  (iii) after such Person engages in
         intentional  and  willful  misconduct  against  the  interests  of  the
         Partnership;  (iv) after such Person  suffers or is subject to an Event
         of Bankruptcy;  or (v) upon the unanimous vote of the Limited  Partners
         to remove the General Partner (which removal may be for any reason).

                  (b) Any such  removal of that  Person as the  General  Partner
         shall be  effective  after  the  following  two  conditions  have  been
         satisfied: (i) delivery of a removal notice to the General Partner from
         all of the Limited Partners;  and (ii) approval by LDE of a new General
         Partner and the  admission  of such Person as a General  Partner in the
         Partnership.

                  (c) If a Person is removed as a General  Partner but continues
         to own a Partnership  Interest,  then the Partnership Interest shall be
         converted into a Partnership Interest as a Limited Partner.

                  (d) If a Person is  removed as General  Partner,  such  Person
         shall perform,  execute and deliver or cause to be performed,  executed
         and  delivered any and all acts,  documents  and  assurances as the new
         General Partner may reasonably require to evidence:  (i) the removal of
         the former General  Partner;  (ii) if  applicable,  a conversion of the
         Partnership  Interest of the former  General  Partner to a  Partnership
         Interest as a Limited Partner; and (iii) the admission of a new General
         Partner.


<PAGE>

                  (e) Notwithstanding anything to the contrary in Article XI, in
         connection  with the  admission of a new General  Partner,  the Limited
         Partners may assign  Partnership  Interests to such new General Partner
         so that such new General Partner has at least a 1% Percentage  Interest
         in all  items of  Profit,  Loss,  income,  gain,  loss  and  deduction,
         Partnership capital,  and distributions.  The Partnership Interest of a
         Limited  Partner that is assigned to such new General  Partner shall be
         converted  into a  Partnership  Interest as a General  Partner upon its
         receipt by the new General Partner.

                                  ARTICLE XIII

                           DISSOLUTION AND WINDING UP

         13.1  Dissolution.

                  (a) Except as otherwise provided in this Agreement, no Partner
         shall  have the right to  terminate  this  Agreement  or  dissolve  the
         Partnership  by its  express  will or by  withdrawal  without the prior
         written consent of the other Partners.

                  (b) The Partnership shall be dissolved upon the first to occur
         of any of the following:

                         (i) the  expiration  of its term as provided in Section
                    1.3;

                         (ii) an  election  to  dissolve  the  Partnership  by a
                    Super-Majority Interest; or

                         (iii) any other event that,  under the Texas Act, would
                    cause the Partnership's dissolution.

         13.2  Continuation of the Partnership.  Except as otherwise provided in
this   Agreement,   upon  the  occurrence  of  an  event  described  in  Section
13.1(b)(iii), if there remains at least one General Partner, the business of the
Partnership  shall be carried on by such General Partner without  dissolution if
approved by LDE. In all other cases,  upon the occurrence of an event  described
in  Section  13.1(b),  the  Partnership  shall be  deemed  to be  dissolved  and
reconstituted only if the remaining  Partners  unanimously elect to continue the
Partnership  within  90 days of such  event.  If no  election  to  continue  the
Partnership is made within 90 days of such event, the Partnership  shall conduct
only those  activities  necessary  to wind up its  affairs.  If an  election  to
continue the  Partnership is made upon the  occurrence of an event  described in
Section 13.1(b), then:

                  (a) if there is no remaining General Partner, then within such
         90 day period a successor General Partner shall be selected by LDE;

                  (b) the Partnership  shall be deemed to be  reconstituted  and
         shall  continue until the end of the term for which it is formed unless
         earlier dissolved in accordance with this Article XIII;

                  (c) the  departing  General  Partner  shall  be  automatically
         admitted  to the  Partnership  as a  Limited  Partner  and  its  former
         Partnership  Interest  as a  General  Partner  shall  be  automatically
         converted to a Limited Partner's Partnership Interest; and

                  (d) all  necessary  steps  shall  be taken to amend or restate
         this Agreement and the Certificate.

         13.3  Liquidation.

                  (a)  Upon   dissolution   of  the   Partnership,   unless  the
         Partnership is continued  under Section 13.2, the General Partner shall
         be the liquidator (the "Liquidator").  The Liquidator shall be entitled
         to receive such  compensation  for its services as may be approved by a
         Super-Majority Interest.

<PAGE>


                  (b) The  Liquidator  shall  agree  not to  resign  at any time
         without  15 days prior  written  notice and may be removed at any time,
         with  or  without   cause,   by  notice  of  removal   approved   by  a
         Super-Majority  Interest. Upon dissolution,  removal, or resignation of
         the Liquidator,  a successor and substitute  Liquidator (who shall have
         and  succeed  to  all  rights,  powers,  and  duties  of  the  original
         Liquidator)   shall  within  30  days   thereafter  be  selected  by  a
         Super-Majority Interest. The right to appoint a successor or substitute
         Liquidator  in the  manner  provided  herein  shall  be  recurring  and
         continuing  for so long as the functions and services of the Liquidator
         are  authorized  to continue  under the  provisions  hereof,  and every
         reference  herein to the Liquidator will be deemed to refer also to any
         such successor or substitute  Liquidator appointed in the manner herein
         provided.

                  (c) Except as  expressly  provided in this Article  XIII,  the
         Liquidator  appointed in the manner  provided herein shall have and may
         exercise,  without  further  authorization  or  consent  of  any of the
         parties  hereto,  all of the powers  conferred upon the General Partner
         under the terms of this Agreement (but subject to all of the applicable
         limitations,  contractual  and  otherwise,  upon the  exercise  of such
         powers) to the extent necessary or desirable in the good faith judgment
         of the  Liquidator  to  carry  out  the  duties  and  functions  of the
         Liquidator  hereunder  for and during  such  period of time as shall be
         reasonably  required in the good faith  judgment of the  Liquidator  to
         complete the winding up and liquidation of the Partnership.

                  (d) Subject to Section 13.4,  the Liquidator  shall  liquidate
         the assets of the  Partnership and apply and distribute the proceeds of
         such  liquidation in the following order of priority,  unless otherwise
         required by mandatory provisions of applicable law:

                         (i)  to the  payment  of the  expenses  of  terminating
                    transactions,   including,  without  limitation,   brokerage
                    commissions, legal fees, accounting fees and closing costs;

                         (ii) to the payment to  creditors  of the  Partnership,
                    including  Partners,  in order of priority  provided by law;
                    and

                         (iii) to the Partners and any  assignees in  accordance
                    with  the  positive  balances  in their  respective  Capital
                    Accounts as provided in section  1.704-1(b)(2)(ii)(b)(2)  of
                    the Regulations;  provided, however, that the Liquidator may
                    place in  escrow a  reserve  of cash or other  assets of the
                    Partnership   for   contingent   liabilities  in  an  amount
                    determined  by the  Liquidator  to be  appropriate  for such
                    purposes.

<PAGE>


         13.4  Distribution in Kind.  Notwithstanding the  provisions of Section
13.3 which require the liquidation of the assets of the Partnership, but subject
to  the  order  of  priorities  set  forth  therein,  if on  dissolution  of the
Partnership  the  Liquidator  and a  Super-Majority  Interest  determine that an
immediate sale of part or all of the  Partnership's  assets would be impractical
or would cause undue loss to the Partners and any assignees,  the Liquidator may
defer for a reasonable time the liquidation of any assets except those necessary
to satisfy liabilities of the Partnership (other than those to Partners) and/or,
after obtaining the approval of a Super-Majority Interest, may distribute to the
Partners and assignees,  in lieu of cash, as tenants in common and in accordance
with the  provisions of Section 13.3,  undivided  interests in such  Partnership
assets  as  the  Liquidator  deems  not  suitable  for  liquidation.   Any  such
distributions  in kind  shall be  subject  to such  conditions  relating  to the
disposition and management of such properties as the Liquidator deems reasonable
and  equitable  and  to any  joint  operating  agreements  or  other  agreements
governing the operation of such  properties at such time.  The  Liquidator and a
Super-Majority  Interest  shall  determine the fair market value of any property
distributed in kind using such reasonable method of valuation as it may adopt.

         13.5  Cancellation  of  Certificate of  Limited Partnership.  Upon  the
completion of the  distribution  of Partnership  property as provided in Section
13.3 and Section 13.4, the Partnership  shall be terminated,  and the Liquidator
(or the  General  Partner and Limited  Partners  if  necessary)  shall cause the
cancellation of the Certificate in the State of Texas and of all  qualifications
and  registrations  of the  Partnership  as a  foreign  limited  partnership  in
jurisdictions other than the State of Texas and shall take such other actions as
may be necessary to terminate the Partnership.

         13.6  Return  of  Capital.  The General Partner shall not be personally
liable for the return of the Capital  Contributions of Limited Partners,  or any
portion  thereof,  it being  expressly  understood that any such return shall be
made solely from Partnership assets.

                                   ARTICLE XIV

                        AMENDMENT OF AGREEMENT; CONSENTS

         14.1  Amendment  Procedures.  All  amendments  to this  Agreement shall
be in  accordance  with  the  following  requirements:  (a)  amendments  to this
Agreement  may be  proposed  only by the  General  Partner  or a  Super-Majority
Interest;  (b) a proposed  amendment shall be effective upon its approval by all
of the  Partners;  and (c) the General  Partner  shall notify all Partners  upon
final adoption of any such proposed amendment.

         14.4  Action  Without  a  Meeting.  Any  action  that may  be taken  by
Limited  Partners may be taken without a meeting if a consent in writing setting
forth the action so taken is signed by Limited Partners owning not less than the
minimum  Percentage  Interests that would be necessary to authorize or take such
action pursuant to the terms of this  Agreement.  To the extent that the laws of
any  jurisdiction  to which the  Partnership  or the  Partnership  Agreement  is
subject  require  that any action of Limited  Partners  under this  Agreement be
unanimous,  any action taken by Limited  Partners  pursuant to and in accordance
with the preceding sentence shall be deemed to constitute the act of all Limited
Partners  and, in such event,  each  Limited  Partner that does not execute such
written  consent  hereby  agrees to be bound by the  decision  of those  Limited
Partners  executing  such consent and hereby  approves such action to the extent
such approval is required for such matter to be effective under the laws of such
jurisdiction.  Prompt  notice  of the  taking of such  action  shall be given to
Limited Partners who have not consented in writing to such action.


<PAGE>

                                   ARTICLE XV

                               GENERAL PROVISIONS

         15.1  Addresses  and  Notices.  Any notice, demand,  request, or report
required  or  permitted  to be given or made to a Partner  under this  Agreement
shall be in writing and shall be deemed  given or made when  delivered in person
or when sent by United States registered or certified mail to the Partner at the
address herein  specified  (i.e.,  the address shown on its signature page or as
changed  pursuant  to Section  1.4(b)  hereof),  regardless  of any claim or any
Person who may have an  interest  in any  Partnership  Interest  by reason of an
assignment or otherwise.

         15.2  Titles and Captions.  All article and section titles and captions
in this  Agreement are for  convenience  only,  shall not be deemed part of this
Agreement,  and in no way shall define,  limit, extend, or describe the scope or
intent of any provisions  hereof.  Except as  specifically  provided  otherwise,
references to  "Articles"  and  "Sections"  are to Articles and Sections of this
Agreement.

         15.3 Pronouns  and  Plurals.  Whenever  the  context  may require,  any
pronoun  used in this  Agreement  shall  include  the  corresponding  masculine,
feminine, or neuter forms, and the singular form of nouns,  pronouns,  and verbs
shall include the plural and vice versa.

         15.4  Further  Action.  The  parties  shall   execute  all   documents,
provide all  information,  and take or refrain from taking all actions as may be
necessary or appropriate to achieve the purposes of this Agreement.

         15.5  Binding Effect.  This  Agreement  shall be binding upon and inure
to the benefit of the parties hereto and their heirs, executors, administrators,
successors, legal representatives, and permitted assigns.

         15.6Integration.  This Agreement  constitutes the entire agreement
among the parties hereto  pertaining to the subject matter hereof and supersedes
all prior agreements and understandings pertaining thereto.

         15.7 Creditors.  None of the provisions of this Agreement shall  be for
the benefit of or enforceable by any creditors of
the Partnership.

         15.8  Waiver.  No failure  by  any  party  to  insist  upon the  strict
performance of any covenant,  duty, agreement, or condition of this Agreement or
to  exercise  any  right  or  remedy  consequent  upon a  breach  thereof  shall
constitute a waiver of any such breach or any other covenant,  duty,  agreement,
or condition.

         15.9  Counterparts.  This  Agreement  may be  executed in counterparts,
all of which together shall constitute one agreement  binding on all the parties
hereto,  notwithstanding  that  all  such  parties  are not  signatories  to the
original or the same counterpart.

         15.10  Applicable Law.  This Agreement shall be construed in accordance
with and  governed  by the laws of the  State of  Texas,  without  regard to the
principles of conflicts of law.

         15.11  Invalidity of Provisions.  If any provision of this Agreement is
declared or found to be illegal,  unenforceable,  or void,  in whole or in part,
then the  parties  shall be  relieved  of all  obligations  arising  under  such
provision, but only to the extent that it is illegal, unenforceable, or void, it
being the intent and  agreement  of the  parties  that this  Agreement  shall be
deemed amended by modifying  such  provision to the extent  necessary to make it
legal and enforceable  while  preserving its intent or, if that is not possible,
by  substituting  therefor  another  provision that is legal and enforceable and
achieves the same objectives.

                  [REMAINDER OF PAGE INTENTIONALLY LEFT BLANK.]











<PAGE>


         IN WITNESS WHEREOF,  the parties hereto have executed this Agreement to
be effective as of the Effective Date.

GENERAL PARTNER:                           PHYMED, INC.,
                                           an Oklahoma corporation

Address:

_________________________________          By:_________________________________
_________________________________          Name:_______________________________
                                           Title:______________________________

LIMITED PARTNER:                           LDE VENTURES, INC.,

                                           an Illinois corporation

Address:


_______________________                    By:  _______________________________
_______________________                    Name: ______________________________
_______________________                    Title: _____________________________
















<PAGE>






                                    EXHIBIT A
                                    ---------

                          Initial Percentage Interests
                          ----------------------------

                        PHYMED                    65%
                        LDE                       35%





























- --------------------------------------------------------------------------------
                             MASTER LEASE AGREEMENT

- --------------------------------------------------------------------------------

                Master Lease Agreement No. 11113 ("MASTER LEASE")

LESSOR: PRIME LEASING, INC.,             LESSEE: White Rock JV, Ltd.
an Illinois corporation ("LESSOR")       an Texas Limited Partnership ("LESSEE")
10275 W. Higgins Road                    9603 White Rock Trail
Rosemont, IL  60018                      Dallas, TX   75238
847/294-6000                             Phone:


WHEREAS,  LESSOR desires to lease certain equipment  ("Equipment") to LESSEE and
may lease additional equipment (referred to as "Additional Equipment") to Lessee
in the future (the  Equipment and the  Additional  Equipment  being  referred to
collectively  as the  "Equipment");  WHEREAS,  LESSEE  desires to lease  certain
Equipment  from  LESSOR and may lease  Additional  Equipment  from Lessor in the
future; and WHEREAS, to facilitate the lease of the Equipment, the parties agree
to enter into this MASTER LEASE and to  incorporate  by  reference  from time to
time in lease  schedules  (hereinafter  referred  to as "Lease  Schedules",  and
individually  as a "Lease  Schedule")  which will be attached  hereto and made a
part hereof, various units of Equipment; NOW, THEREFORE, in consideration of the
mutual promises contained herein and other good and valuable consideration,  the
parties hereto agree as follows:

         TERMS, CONDITIONS AND COVENANTS OF LEASE



<PAGE>


1. LEASE:  This MASTER LEASE sets forth the terms and conditions by which LESSOR
agrees to lease to LESSEE and LESSEE  agrees to lease from LESSOR the  Equipment
as listed and described in each Lease Schedule  executed pursuant to this MASTER
LEASE.  Each Lease  Schedule shall be separate and distinct for all purposes and
shall incorporate  therein all the terms and conditions of this MASTER LEASE. If
there is a conflict  between the Lease Schedule and this MASTER LEASE, the terms
and conditions of this MASTER LEASE shall govern and control.

2.   TERM:

a. The term of this MASTER  LEASE shall begin on the date of execution by LESSOR
and shall continue in effect  thereafter  until all of LESSEE'S  obligations and
liabilities  under this MASTER  LEASE and every Lease  Schedule  have been fully
performed or otherwise discharged.

b. The lease term for each Lease  Schedule  shall commence on the earlier of the
Equipment  installation,  first  clinical use, or the cutover date  (hereinafter
referred to as "Commencement  Date").  If any Equipment under the Lease Schedule
is not newly installed,  then the Commencement Date shall be the date upon which
title to the Equipment  passes to LESSOR.  The lease term shall continue for the
number of months set forth in the Lease  Schedule  (hereinafter  referred  to as
"Initial Term") and continue for any extended or renewal term. The first payment
date of the  Initial  Term  shall  be the  first  day of the  month  immediately
following the Commencement  Date (or beginning on the Commencement  Date if that
date is on the first day of the month).

e. LESSEE shall  deliver to LESSOR a Certificate  of Acceptance  within five (5)
days of the  Commencement  Date. If Lessee fails to deliver the  Certificate  of
Acceptance,  LESSEE shall be deemed to have  accepted the Equipment as installed
and operational as of the  Commencement  Date unless LESSEE gives LESSOR written
notice of each defect within five (5) days of the Commencement Date.

3. RENT AND PAYMENTS:  LESSEE'S obligation to pay rent under each Lease Schedule
shall begin on the Commencement Date and continue for the term. The monthly rent
(hereinafter  referred  to as  "Monthly  Rent") set forth in the Lease  Schedule
shall be due and  payable  in advance  on the first day of each  calendar  month
during the Initial Term without notice or demand  notwithstanding  the fact that
LESSOR may, as a convenience only, invoice LESSEE. If the Commencement Date of a
Lease Schedule shall be other than the first day of the month, LESSEE shall make
a rental payment (hereinafter  referred to as "Interim Rent") equal to 1/30th of
the Monthly Rent set forth in the Lease Schedule for each day beginning with the
Commencement  Date to and  including  the  last  day of the  month  prior to the
beginning of the Initial Term.  Any amounts  payable by LESSEE under this MASTER
LEASE  other  than the  Monthly  Rent and  Interim  Rent  shall be  deemed to be
additional rent (hereinafter referred to as "Additional Rent") and shall be paid
within twenty (20) days of invoicing by LESSOR.  Rent shall be paid to LESSOR at
the address  designated  herein or at such other place as LESSOR  designates  in
writing,  or if to an assignee of LESSOR,  at such place as such assignee  shall
designate  in  writing,  by  check  or wire  transfer  so  that  all  funds  are
immediately  available.  As used herein,  the term "rent" shall mean all Monthly
Rent, Interim Rent and Additional Rent. THIS IS A NON-CANCELABLE  LEASE.  LESSEE
shall pay the total  rents for the entire term to LESSOR,  or LESSOR'S  assignee
(as  defined  herein),   and  such  payment  of  rents  shall  be  absolute  and
unconditional  without  right to  setoff,  reduction,  abatement,  counterclaim,
recoupment, or defense of any kind whatsoever.

<PAGE>


a.  SERVICE  CHARGE:  In the event  that any rent is not  received  by LESSOR or
LESSOR'S assignee within five (5) days of the due date thereof, LESSEE shall pay
a service  charge of five  percent  (5%) of the past due  payment  and shall pay
interest at the rate of 1.5 percent  (1.5%) per month or the maximum legal rate,
whichever is less, until all past due rents are received.

b. LEASE BASIS COST:  The term "Lease  Basis Cost" as used herein means the cost
of acquiring,  delivering and installing the Equipment including but not limited
to all parts, materials, labor, services,  transportation,  taxes, and all other
charges of every kind and nature associated therewith.

c. NON-PERFORMANCE: If LESSEE fails to perform any of its covenants, warranties,
terms or  conditions  herein,  LESSOR may,  at its  option,  perform on LESSEE'S
behalf  and all  monies  advanced  by  LESSOR  shall be  repayable  by LESSEE as
Additional Rent.  However,  in no event shall LESSOR'S  performance on behalf of
LESSEE be deemed to relieve LESSEE of its obligations hereunder.

4. LEGAL TITLE, LIENS, TAXES AND QUIET ENJOYMENT: During the term of this MASTER
LEASE, legal title to all Equipment shall at all times vest in LESSOR.  LESSEE'S
interest in the Equipment  shall be limited to its possession and use and LESSEE
shall  not have or  assert  any  right,  title or  interest  therein,  except as
expressly  set forth herein,  and shall  protect,  indemnify and defend,  at its
expense,  LESSOR'S legal title. LESSEE shall, at its expense, keep the Equipment
free and clear of any lien or encumbrance of any kind whatsoever  except that of
LESSOR arising  hereunder.  LESSEE warrants that the Equipment will at all times
remain  personal  property,  regardless  of how it may be  affixed  to any  real
property.  Prior to LESSOR'S  acceptance  of this  MASTER  LEASE,  LESSEE  shall
provide LESSOR with a waiver, in form satisfactory to LESSOR, by the landlord or
mortgagee of the premises in which the Equipment is located,  of such landlord's
or  mortgagee's  rights in and to the  Equipment  and/or the rent due under this
MASTER  LEASE.  In lieu of such  waiver,  LESSEE  hereby  agrees to hold  LESSOR
harmless  and  indemnify  LESSOR  with  regard to any and all  claims,  actions,
damages,  costs and attorneys fees asserted by any landlord or mortgagee against
LESSOR or the Equipment herein. LESSEE shall pay all taxes,  assessments or fees
assessed  against the  Equipment  or payable by LESSOR or LESSEE with respect to
the  Equipment,  including  any interest or penalties  therein,  excepting  only
federal or state taxes  based on the net income of LESSOR and without  regard to
LESSOR'S  agreement to invoice LESSEE for such amounts.  LESSEE  agrees,  to the
extent  permissible  by law,  to prepare and file all  required  tax returns and
other  reports  (other  than  reports  regarding  LESSOR'S  income tax) with any
federal,  state or other  regulatory  authority.  LESSEE further agrees,  to the
extent  permitted by law, to take such actions and to file such documents as may
be required to ensure that the valuation of the  Equipment,  as reflected on the
records and tax rolls of applicable taxing authorities, does not exceed the fair
market value of the  Equipment.  To the extent  LESSEE is not  permitted to file
such returns, reports, or documents,  LESSEE shall prepare them and provide them
to LESSOR  for  filing  prior to the date such  return or report is due.  LESSOR
shall have the right to affix a stencil,  plate,  label or other  indicia of its
ownership  to the  Equipment  and  LESSEE  shall  not  remove  or  conceal  such
identification.  LESSEE shall have the right to quiet enjoyment of the Equipment
during the term of the Lease Schedule, so long as no event of default (as herein
defined) occurs.

<PAGE>


5.  LOCATION,  USE,  MODIFICATIONS  AND  ALTERATIONS:  LESSEE shall not move, or
permit the movement of, the Equipment from the location (hereinafter referred to
as "Equipment  Location") specified in the Lease Schedule without LESSOR'S prior
written  consent.  LESSEE  shall not use,  or permit the use of,  the  Equipment
unless such use is consistent  with LESSEE'S  business,  by qualified  operators
under  LESSEE'S   control  and  in  compliance  with  (A)  applicable  laws  and
regulations;   (B)  the   specifications   of,  and  use  contemplated  by,  the
manufacturer of the Equipment  (hereinafter referred to as "Manufacturer");  (C)
the terms of LESSEE'S insurance  coverage;  and (D) the requirements of LESSEE'S
maintenance  agreement  regarding  the  Equipment.  LESSEE  shall  not  make any
modifications,  alterations or additions to the Equipment without LESSOR'S prior
written consent (other than Manufacturer's  Changes, as such term is hereinafter
defined)  unless said additions (A) are readily  removable  without  causing any
damage to the Equipment and (B) do not impair the quality,  safety,  function or
marketability  of  the  Equipment  (hereinafter  referred  to  as  a  "Permitted
Modification").  Any  Permitted  Modification  shall not become the  property of
LESSOR  and  shall not be  subject  to the Lease  Schedule,  provided  that upon
termination  or  expiration  of the term,  LESSEE  shall  remove  all  Permitted
Modifications and restore the Equipment to its original condition (ordinary wear
and tear  excepted),  all at no  expense  to  LESSOR.  LESSEE  shall  permit the
Manufacturer,  its agents or its  contractors,  access to the  Equipment for the
purpose of performing such upgrades, recall orders or engineering changes as the
Manufacturer  shall require to enhance or maintain the  Equipment's  standard of
performance  (herein defined as  "Manufacturer's  Changes"),  all of which shall
immediately become the property of LESSOR and be subject to the Lease Schedule.

6.  MAINTENANCE  AND INSPECTION:  THIS IS A NET LEASE.  LESSEE shall, at its own
expense,  maintain the  Equipment in good  condition  and repair and furnish all
necessary repairs,  parts,  materials and supplies.  At all times herein, LESSEE
shall  keep  in  full  force  and  effect  a  maintenance   agreement  with  the
Manufacturer or, with LESSOR'S consent,  with an equivalent service organization
that routinely maintains such Equipment  (hereinafter referred to as "Equivalent
Service Organization"). During reasonable business hours and subject to LESSEE'S
reasonable security precautions, LESSEE shall permit LESSOR access to all of the
Equipment  for the purpose of  inspecting  the  Equipment to determine  LESSEE'S
compliance  with this MASTER  LEASE.  If LESSEE is not in  compliance  with this
MASTER LEASE, LESSOR shall notify LESSEE in writing of the acts of noncompliance
and LESSEE shall  immediately cease using the Equipment until full compliance is
achieved.

7.  DISCLAIMER  OF  WARRANTIES:   LESSEE  has  selected  at  its  own  risk  the
Manufacturer,  size and design of the Equipment. LESSEE acknowledges that LESSOR
is not the Manufacturer,  or its agent or distributor,  and that LESSOR MAKES NO
REPRESENTATIONS  OR  WARRANTY  OF  ANY  KIND  WHATSOEVER,  EXPRESS  OR  IMPLIED,
INCLUDING BUT NOT LIMITED TO  REPRESENTATIONS  OR WARRANTIES WITH RESPECT TO THE
MERCHANTABILITY,   VALUE,  CONDITION,   QUALITY,  DESIGN,  CAPACITY,   MATERIAL,
WORKMANSHIP  OR  FITNESS OR  SUITABILITY  FOR ANY  PURPOSE OR USE BY LESSEE,  OR
PATENT,  COPYRIGHT  OR  TRADEMARK  INFRINGEMENT.  LESSOR SHALL NOT BE LIABLE FOR
LOSSES OR DAMAGES THEREFROM,  INCLUDING BUT NOT LIMITED TO LOSS OF BUSINESS,  OR
ACTUAL OR  ANTICIPATED  PROFITS,  OR OTHER DIRECT,  INCIDENTAL OR  CONSEQUENTIAL
DAMAGES OF ANY KIND WHATSOEVER  ARISING FROM THIS MASTER LEASE OR THE EQUIPMENT.
So long as no Event of Default (as herein  defined) has  occurred and  continues
uncured,   LESSOR   assigns   LESSEE  all  of   Manufacturer's   warranties  and
indemnifications,  to  the  extent  said  warranties  and  indemnifications  are
assignable.

8. RISK OF LOSS: LESSEE hereby assumes and shall bear the entire risk of changes
to, loss,  theft,  damage,  destruction or seizure  (hereinafter  referred to as
"Event of Loss") of the Equipment from every cause whatsoever.  No Event of Loss
shall  relieve  LESSEE of its  obligations  to pay rent or to perform  any other
obligation  under this  MASTER  LEASE.  If any of the  Equipment  is damaged and
repairable,  LESSEE shall promptly  notify LESSOR of the occurrence of the Event
of Loss and shall, at LESSEE'S  expense within thirty (30) days of such Event of
Loss,  cause  repairs to be made to the Equipment to restore it to the condition
required  pursuant  to Section 6 herein.  If the  Equipment  is  damaged  beyond
repair,  LESSEE shall  promptly  notify LESSOR of the occurrence of the Event of
Loss and shall,  at  LESSEE'S  expense  within  thirty (30) days of the Event of
Loss:  (A) replace the Equipment  with like equipment in good repair and working
order or (B) pay to LESSOR in cash the  following:  (1) the  greater  of (a) ten
percent (10%) of the Lease Basis Cost or (b) the actual fair market value of the
Equipment  calculated  as of the date of the Event of Loss;  and (2) all amounts
which have  accrued and have not been paid by LESSEE to LESSOR under this MASTER
LEASE  through the date of the Event of Loss;  and (3) the present  value of the
unpaid rent  discounted  at a rate of five percent (5%) for the remainder of the
Initial Term for each Lease  Schedule  covering the Equipment  (the total amount
described in (1), (2), and (3) above is hereinafter  collectively referred to as
"Casualty Value").

<PAGE>


9. INSURANCE:  LESSEE shall provide and maintain,  at its sole cost and expense:
(1) all risk property  insurance on the Equipment for its full replacement value
in an amount no less  than the  Casualty  Value,  and (2)  comprehensive  public
liability  and property  damage  insurance on the  Equipment in amounts not less
than  $1,000,000.00 per occurrence and  $3,000,000.00 in the aggregate,  with an
insurer  reasonably  acceptable to LESSOR  considering  the risks to be insured.
LESSEE shall provide LESSOR or its assigns (in a form acceptable to LESSOR) with
certificates of insurance and a loss payable  endorsement in favor of LESSOR and
its  assigns,  as loss payee for  property  damage  coverage  and as  additional
insured for public liability coverage.  If specifically  requested in writing by
LESSOR,  LESSEE  shall  provide a copy of the  insurance  policy under which the
certificates  are issued.  The  insurance  endorsement  shall  provide  that the
coverage  shall not be materially  altered or cancelled  unless thirty (30) days
prior  written  notice has been given to LESSOR  and its  assigns,  and that the
coverage afforded to LESSOR and its assigns, shall not be rescinded, impaired or
invalidated  by any act or omission of LESSEE.  LESSOR may apply proceeds of any
such insurance to any of LESSEE'S  obligations  hereunder,  but shall pay excess
proceeds,  if any, to LESSEE upon LESSEE'S full  satisfaction of its obligations
hereunder.

10.  GENERAL  INDEMNIFICATION:  Except  for  liability  arising  from the  gross
negligence  or willful  misconduct of LESSOR,  its  employees or agents,  LESSEE
hereby  agrees to  indemnify,  defend,  protect  and hold  LESSOR,  its  agents,
employees,  directors and assigns  harmless from and against any and all claims,
losses, damages. injuries, suits, demands or expenses, including but not limited
to attorney's fees and costs of whatever kind and nature,  arising in connection
with the  Equipment,  including  without  limitation  its  selection,  purchase,
installation,  use, deinstallation,  delivery,  return or manufacture (including
without  limitation  patent,  trademark  or other  infringement).  LESSEE  shall
promptly notify LESSOR or its assigns of any matter hereby indemnified against.

11.  RETURN  OF  EQUIPMENT:  Upon  the  expiration  of  any  Lease  Schedule  or
termination  for any other  cause,  LESSEE at is sole  cost and  expense,  shall
assemble, crate, insure and deliver all of the Equipment, and all of the service
records relating thereto,  subject to the Lease Schedule,  to LESSOR in the same
good condition and repair as when received,  ordinary wear and teat excepted, to
such reasonable destination within the continental United States as LESSOR shall
designate.  LESSEE  shall  immediately  prior  to the  return  of  each  unit of
Equipment,  provide LESSOR a letter from the  Manufacturer  certifying that each
unit of Equipment is in good working order, ordinary wear and tear excepted, and
is eligible  for a  maintenance  agreement  by the  Manufacturer  or  Equivalent
Service  Organization.  LESSEE  shall  provide  LESSOR with at least one hundred
twenty (120) days written notice of the return of the Equipment. Notwithstanding
any other rights and remedies of LESSOR, if LESSEE fails to return the Equipment
to LESSOR or its designee within ten (10) days of the time required,  then until
such time as the Equipment is returned, LESSEE shall pay on demand as liquidated
damages,  not as a penalty,  and at LESSOR'S  election,  an amount  equal to (A)
twelve (12) months rent; or (B) one hundred twenty percent (120%) of the Monthly
Rent for each month or portion thereof until the Equipment is returned to LESSOR
as detailed herein.

<PAGE>


12.  LESSEE'S  REPRESENTATIONS  AND  WARRANTIES:  LESSEE represents and warrants
to LESSOR with regard to this MASTER LEASE and each

Lease Schedule to be appended hereto that:

a. The  execution,  delivery and  performance of this MASTER LEASE and any Lease
Schedule  have  been  duly  authorized  by all  necessary  action on the part of
LESSEE,  and this MASTER LEASE  constitutes  a valid and binding  obligation  of
LESSEE enforceable against LESSEE in accordance with its terms;

b.  The individual executing this MASTER LEASE on behalf of LESSEE is duly
authorized;

c.  Neither the  execution or delivery by LESSEE of this MASTER  LEASE,  nor the
performance  thereof  by  LESSEE,  conflicts  with,  results  in a breach  of or
constitutes  a default or violation of LESSEE'S  Certificate  of  Incorporation,
By-Laws,  applicable  law,  court order or any agreement or other  instrument to
which LESSEE is a party or by which it is bound;

d. LESSEE is duly organized and in good standing in its state of  incorporation,
is duly  qualified to do business in each  jurisdiction  where the  Equipment is
located and where such qualification is required;

e. Upon request by LESSOR,  LESSEE shall furnish its most recent  audited annual
financial  statements  prepared in accordance with generally accepted accounting
principles;  and LESSEE shall furnish its quarterly financial  statements within
___ days after the end of each quarter,  prepared in accordance  with  generally
accepted  accounting  principles,  and being certified as true and correct by an
authorized officer of LESSEE;

f. LESSEE shall provide to LESSOR any other  documents  reasonably  requested to
consummate  this  transaction  or any Lease  Schedule or as reasonably  required
under this MASTER LEASE;

g. No  approval,  consent or  authorization  is required  from any  governmental
authority with respect to the execution,  delivery or performance of this MASTER
LEASE, or if any such approval,  consent or  authorization  is required,  it has
been obtained.

13.  EVENT OF DEFAULT:  The  occurrence  of any of the  following  events  shall
constitute an event of default by LESSEE or its guarantor  (hereinafter referred
to as an "Event of Default"):

a. Failure to pay when due any  installment  of rent or other sum due hereunder,
and such failure shall continue for more than five (5) days; or

b. Failure to perform any other term or condition,  covenant,  representation or
warranty of this MASTER LEASE or any Lease Schedule,  and such failure continues
for a period of twenty (20) days after notice thereof; or

c. If LESSEE or its guarantor ceases doing business as a going concern,  becomes
insolvent,  admits in writing its inability to pay its debts as they become due,
makes an assignment for the benefit of its creditors, files a voluntary petition
or answer seeking any reorganization,  arrangement,  composition,  readjustment,
liquidation,  dissolution  or similar relief under any present or future federal
or state statute,  law or regulation,  admits,  consents to or acquiesces in the
appointment  of a receiver or trustee of any of its property,  the commission of
any act of  dissolution,  liquidation or the bankruptcy or death of the LESSEE'S
guarantor in the event that the Guarantor is a natural person; or

<PAGE>


d.  Failure  within  sixty (60) days after the  commencement  of any  proceeding
against  LESSEE  or  its  guarantor  seeking  any  reorganization,  arrangement,
composition,  readjustment,  liquidation,  dissolution,  bankruptcy  or  similar
relief under any current or future federal or state  statute,  law or regulation
to obtain the dismissal of such proceeding; or

e. If any  warranty,  covenant  or  representation  made by  LESSEE to LESSOR is
false,  incorrect or untrue in any material respect; or if any Equipment subject
to a Lease Schedule is attached, levied upon, encumbered,  pledged or seized; or
LESSEE  defaults under any other  agreement  with LESSOR;  or defaults under any
other material lease, loan or agreement for the borrowing of money; or

f. There is a material  adverse  change in the financial  condition of LESSEE or
its guarantor.

14. REMEDIES: At any time after an Event of Default, LESSOR shall have the right
to exercise any one or more of the following cumulative remedies:

a. Accelerate without notice to LESSEE all of LESSEE'S obligations hereunder and
to sue for and recover all rents and other  amounts  which have accrued or shall
accrue under this MASTER LEASE,  all of which shall become  immediately  due and
payable upon demand by LESSOR;

b.  Require  that  LESSEE  assemble  the  Equipment  and deliver it to LESSOR as
provided  under Section 11 or enter the premises  where any Equipment is located
without  notice or process of law and take  possession of the Equipment  without
incurring  any  liability  to LESSEE or any other party for any damages  arising
from such taking of possession;

c. Sell any or all of the Equipment at public or private sale or relet same;

d.  Terminate  this MASTER  LEASE or any Lease  Schedule as to any or all of the
Equipment; and

e. At law or in  equity,  enforce  any of  LESSOR'S  rights or pursue  any other
remedy now or hereafter arising.

LESSOR'S  remedies  hereunder are cumulative in nature,  not exclusive,  and the
exercise of any  particular  remedy  shall not be construed to be an election of
remedies  by LESSOR nor shall any waiver or delay by LESSOR of any of its rights
or remedies under this MASTER LEASE be construed as a waiver of LESSOR'S  rights
to enforce  that, or any other,  right or remedy in the future.  Notwithstanding
LESSOR'S election of remedies,  LESSEE shall remain liable for the present value
of all rents  discounted  at a rate of five percent (5%) and other amounts which
have accrued or would have accrued  during the Initial  Term, in addition to (A)
all of LESSOR'S costs and expenses  incurred in enforcing its rights  hereunder,
or in taking  of  possession,  storing,  repairing,  selling  or  reletting  the
Equipment,  (B) court costs and  reasonable  attorney's  fees, and (C) an amount
equal to the greater of (1) ten percent (10%) of the Lease Basis Cost or (2) the
fair market value  calculated as of the date of such Event of Default,  less (D)
the net  proceeds  of a public or  private  sale or  reletting,  if any,  of the
Equipment,  at the present  value,  if  necessary,  discounted at a rate of five
percent (5%) and (E) any insurance  proceeds  recovered by LESSOR from insurance
coverage  provided by LESSEE.  However,  in no event shall LESSOR'S  exercise of
more than one of its remedies entitle LESSOR to recover from LESSEE an amount in
excess of that referred to in this section.


<PAGE>

15.  ASSIGNMENT AND SUBLEASE

a. LESSOR'S  ASSIGNMENT:  LESSEE  understands and  acknowledges  that LESSOR has
entered  into this  MASTER  LEASE and shall  enter into each Lease  Schedule  in
anticipation of assigning,  mortgaging, or otherwise transferring its rights and
interests thereunder and/or in the Equipment (but not its obligations) to others
(hereinafter  referred to as  "Assignees")  without  notice to or the consent of
LESSEE. Accordingly, LESSOR and LESSEE agree that:

(1)  LESSEE  will,  after due  notice,  acknowledge  in writing  such  notice of
assignment as reasonably  requested by LESSOR or its Assignee,  and pay directly
to the  designated  Assignee the amounts  which  become due under each  assigned
Lease  Schedule and such payment  shall be absolute and  unconditional,  without
reduction,  abatement,  offset or counterclaim of any kind.  Notwithstanding the
foregoing,  LESSEE reserves its rights to have recourse  directly against LESSOR
on account of any claim it may have against LESSOR.

(2) Any Assignee may reassign its rights and interests  hereunder  with the same
effect as the original assignment.

(3) LESSEE agrees to execute all filings pursuant to the Uniform Commercial Code
as well as any other documents  reasonably  requested by LESSOR or its Assignee.
Any  Assignee  shall  not be  liable to  LESSEE  for any  obligations  of LESSOR
hereunder.

b. LESSEE'S  ASSIGNMENT AND SUBLEASE:  Without  LESSOR'S prior written  consent,
LESSEE shall not: (A) assign any of its  obligations  hereunder,  (B) attempt to
sublease the Equipment or (C) attempt to sell,  transfer,  hypothecate,  dispose
of, lend or abandon the Equipment or any of LESSEE'S rights in it.

16.  CHOICE OF LAW AND FORUM:  This MASTER  LEASE and the  provisions  contained
herein  shall be deemed to have been  executed  at LESSOR'S  principal  place of
business in Rosemont, Illinois and shall be governed in all respects by the laws
of the State of Illinois.  LESSOR and LESSEE on behalf of  themselves  and their
assignees  further agree that courts located in the State of Illinois shall have
jurisdiction over any matters arising out of this MASTER LEASE and hereby submit
themselves to the personal jurisdiction of the Illinois courts.

17. NOTICES:  All notices or demands provided for herein shall be in writing and
shall be deemed given when  delivered  or  deposited in the United  States mail,
first  class,  postage  prepaid,  addressed  to the parties at their  respective
addresses set forth above, or at such other address as may be provided from time
to time.

18.  SURVIVAL OF  OBLIGATIONS:  All the terms and  conditions,  representations,
covenants,  warranties and agreements  contained in this MASTER LEASE and in any
Lease  Schedule or in any document in  connection  herewith  shall  specifically
survive the expiration or termination of this MASTER LEASE.

19. SEVERABILITY:  To the extent any provision of this MASTER LEASE or any Lease
Schedule is deemed partially or wholly invalid or unenforceable under applicable
law, such provision shall be effective to the extent valid and enforceable,  and
all other provisions shall remain in full force and effect.

<PAGE>


20.  LESSOR'S  CONSENT:  When LESSOR'S  consent is required by the terms of this
MASTER LEASE, such consent shall not be unreasonably withheld.

21. LEASE  SCHEDULE  REAFFIRMATION:  The  execution by LESSOR and LESSEE of each
Lease  Schedule  shall  constitute a  reaffirmation  by LESSEE of its covenants,
representations  and warranties  herein and that the same are true,  correct and
complete with respect to the Lease  Schedule as of the date of execution of each
Lease Schedule.

22.  HEADINGS:  All section  headings of this MASTER  LEASE are for  convenience
only,  and shall not in any way limit or  affect  the  meaning  or scope of this
MASTER LEASE or its provisions.

23. NO  WAIVER:  No delay,  omission  or failure to act by LESSOR at any time to
exercise or enforce any right or remedy herein provided shall be a waiver of any
such right or remedy to which LESSOR is entitled, nor shall it in any way affect
the right of LESSOR to enforce such provisions thereafter.

24. ENTIRE AGREEMENT:  This MASTER LEASE constitutes the entire agreement of the
parties hereto and no other written or oral  representations or warranties shall
be binding upon the parties hereto.  NO AGENT OR EMPLOYEE OF THE MANUFACTURER OR
SELLER OF THE EQUIPMENT IS AUTHORIZED TO BIND LESSOR TO THIS MASTER LEASE OR ANY
OTHER  AGREEMENT  OR TO  WAIVE  OR  MODIFY  ANY OF THE  PROVISIONS  HEREOF.  Any
modification  or waiver of any of the provisions  herein shall be effective only
if in writing and executed by all of the parties hereto,  provided  however that
LESSOR may add applicable  Equipment serial or  identification  numbers to Lease
Schedules and financing statements.

25.  SUCCESSOR:  This MASTER LEASE and each Lease Schedule shall be binding upon
and  shall  inure  to  the  benefit  of  LESSOR,  LESSEE  and  their  respective
successors, legal representatives and assigns.

26.  ADDITIONAL  FILINGS:  In the event that LESSEE  fails or refuses to execute
and/or file Uniform Commercial Code financing statements or other instruments or
recordings  which LESSOR or its Assignee  reasonably deems necessary to perfect,
or maintain  perfection  of,  LESSOR'S or its  Assignee's  interests  hereunder,
LESSEE   hereby   appoints   LESSOR  or  its   Assignee  as   LESSEE'S   limited
attorney-in-fact  to execute and record all  documents  reasonably  necessary to
perfect or maintain the perfection of LESSOR'S interest hereunder.  LESSEE shall
pay  LESSOR  or its  Assignee  for any costs and fees  relating  to the  filings
including,  but not limited to, costs,  fees,  searches,  document  preparation,
documentary stamps, privilege taxes and reasonable attorneys' fees.

27. MULTIPLE LESSEES: If more than one LESSEE is named within this MASTER LEASE,
the liability of each shall be joint and several.

28. LEASE  ACCEPTANCE:  At no time shall this MASTER LEASE or the Lease Schedule
be deemed to  constitute  an offer  binding  upon LESSOR until it is accepted by
execution of LESSOR at its corporate office in Rosemont, Illinois.


<PAGE>



PRIME LEASING, INC.,                      WHITE ROCK JV, LTD.
              LESSOR                                  LESSEE
                                           By: PHYMED, INC. as General Partner

By:                                        By:
    ---------------------------------          ------------------------------


Name (Printed):                            Name                (Printed):
               ----------------------      ----------------------------------


Title:                                    Title:
      -------------------------------            -----------------------------


                 Date:       , 1999 Date:        , 1999
                      -------             -------

































                                 LEASE SCHEDULE

LEASE SCHEDULE NUMBER 1                  TO MASTER LEASE AGREEMENT NUMBER  11113
                                                                           -----


This Lease  Schedule  incorporates  the terms and conditions of a certain Master
Lease Agreement,  dated as of the ____ day of , 1999 (the "Master Lease") by and
between PRIME LEASING, INC., O'Hare International Center, 10275 W. Higgins Road,
Rosemont,  Illinois 60018 (the  "Lessor"),  and WHITE ROCK JV, LTD.,  9603 White
Rock Trail, Dallas, TX 75238 (the "Lessee").

THIS IS A NON-CANCELABLE LEASE SCHEDULE.

1.   Initial  Term:  48  months  commencing  with  the  first  day of the  month
     immediately   following  the  Commencement  Date  (or  beginning  with  the
     Commencement Date if that date is the first day of the month.)

2.   Rental Payments: $16,698.00 per month, plus any and all applicable taxes.

     Advance  Payments  receivable  by  Lessor  as  of  the  Commencement  Date:
     $16,698.00  which will be applied to the first  month's rent payable  under
     this Lease Schedule.

3.   Deposit.  LESSEE  will  deliver  to LESSOR on  February  1, 2000 the sum of
     Sixteen Thousand Six Hundred  Ninety-Eight and No/100 Dollars  ($16,698.00)
     in immediately available funds (the "Deposit").  The Deposit shall continue
     to be held by LESSOR,  without liability for interest, as the Deposit under
     this Master Lease.  The Deposit may be applied by LESSOR,  at LESSOR'S sole
     option,  for any past due amount due under this Master Lease.  If LESSEE is
     not in default  under the terms of this  Master  Lease,  any portion of the
     Deposit  not  applied  by LESSOR as  payment of rent or any past due amount
     under this Master Lease, shall be distributed by LESSOR as follows;  first,
     towards the payment of the rent due on the last month of this Master Lease;
     and second after  termination of this Master Lease and contingent on LESSEE
     complying with all of the terms of this Master Lease,  any remaining amount
     to LESSEE.

4.   Conditions  Precedent.  LESSOR'S  obligations under this Lease Schedule are
     subject to the following conditions precedent:


     a.   LESSEE shall have leased that certain real  property and  improvements
          ("Premises") located at 9603 White Rock Trail, Dallas County,  Dallas,
          TX 75238;

     b.   LESSOR  shall  have  received  approval  for this  Master  Lease  from
          LESSOR'S Executive Committee;


LEASE SCHEDULE - Page 1
- --------------

<PAGE>


     c.   LESSOR  shall have  received  the  Guaranty  (as defined in Section 8,
          below);

     d.   Lessor shall have  received a  landlord's  waiver from the landlord of
          the  Premises,  in form  satisfactory  to LESSOR,  waiving  landlord's
          rights in and to the Equipment; and

     e.   LESSOR shall have  received any other  document  reasonably  requested
          from LESSEE by LESSOR.

5.   Equipment: See Equipment Schedule attached hereto and made a part hereof.

6.   Commencement Date:_______________, 1999, as evidenced by the Certificate of
     Acceptance, issued in respect to this Lease Schedule.


7.   End of Lease Options: At the end of the Initial Term, Lessee has the option
     to: (A)  purchase  all,  but not less than all,  of the  Equipment  at Fair
     Market Value, as described in the Master Lease; (B) renew the lease of all,
     but not less than all, of the Equipment at a Monthly Rent based on the then
     Fair Market  Value of the  Equipment;  or (C) return all, but not less than
     all, of the Equipment, subject to the terms and conditions as stipulated in
     the Master Lease.

8.   Guaranty.  By its  signature  below,  PHYMED,  INC.,  a  Texas  corporation
     ("PARENT"),  agrees that it will  execute a Guaranty,  dated as of the date
     hereof, that is acceptable to LESSOR, at LESSOR'S sole discretion,  whereby
     PARENT will guarantee to LESSOR,  the due,  regular and punctual payment of
     all of LESSEE'S obligations herein, including all rents due herein.

9.   Entire Agreement:  LESSEE REPRESENTS THAT IT HAS READ, RECEIVED, RETAINED A
     COPY OF AND  UNDERSTANDS  THIS LEASE SCHEDULE AND AGREES TO BE BOUND BY ITS
     TERMS AND CONDITIONS. LESSOR AND LESSEE AGREE THAT THIS LEASE SCHEDULE, THE
     MASTER LEASE AND ALL RIDERS THERETO SHALL  CONSTITUTE THE ENTIRE  AGREEMENT
     AND SUPERSEDE ALL PROPOSALS,  ORAL OR WRITTEN,  ALL PRIOR  NEGOTIATIONS AND
     ALL OTHER COMMUNICATIONS BETWEEN LESSOR AND LESSEE WITH RESPECT TO ANY UNIT
     OF EQUIPMENT.

THIS LEASE SCHEDULE IS EFFECTIVE ONLY UPON ACCEPTANCE BY LESSOR AT ITS CORPORATE
OFFICE IN ROSEMONT, ILLINOIS.


LEASE SCHEDULE - Page 2
- --------------

<PAGE>



Accepted on _____________________, 1999, at Rosemont, Illinois.


PRIME LEASING, INC.                        White Rock JV, Ltd.
(Lessor)                                   (Lessee)
                                           By: PHYMED, INC. as General Partner

By:___________________________________     By:__________________________________

Name (Printed):_______________________     Name (Printed):______________________

Title:________________________________     Title:_______________________________

                                           Date: _________________________, 1999


PHYMED, INC.,
(Parent)



By:___________________________________

Name (Printed):_______________________

Title:________________________________

Date: October ___, 1999













LEASE SCHEDULE - Page 3
- --------------


<PAGE>


                               EQUIPMENT SCHEDULE

                                       TO

                             LEASE SCHEDULE NUMBER 1

                                       TO

                       MASTER LEASE AGREEMENT NUMBER 11113
                                                     -----

Quantity          Description of Equipment                         Serial Number
- --------          ------------------------                         -------------
   1              1996 Siemens Magnatom 1.5 T Vision MRI               7170

                  All Accounts Receivable as generated from
                  the use of the Siemens MRI as listed above

















                   EQUIPMENT LOCATION: 9603 White Rock Trail,
                                Dallas, TX 75238
















LEASE SCHEDULE - Page 4
- --------------







                         MANAGEMENT/LICENSING AGREEMENT

This MANAGEMENT/LICENSING  AGREEMENT (this "AGREEMENT") is made and entered into
by and between PhyMed Contracted Services, Inc., a Texas corporation ("Manager")
("Licensor") and White Rock JV, Ltd., (the "Center") ("Licensee");

WHEREAS,  Manager is in the business of  operating  medical  diagnostic  imaging
Centers and  providing  management  services  to medical  and other  health care
practitioners in the conduct of their professional and technical operations; and

WHEREAS,  Center is engaged in the operation of an outpatient medical diagnostic
imaging  center  doing  business  in the State of Texas;  and Center  desires to
retain  the  experience  and  abilities  of Manager  in the  furtherance  of the
business  of Center  and has  offered to engage  Manager  to render  consulting,
management, advisory and other tangible benefits;

NOW,  THEREFORE,   in  consideration  of  the  foregoing  recitals,  the  mutual
agreements  contained  herein,  and other good and valuable  consideration,  the
receipt and sufficiency of which are hereby  acknowledged,  the parties agree as
follows:

1. TERM. This AGREEMENT shall be for a term of four (4) years  commencing on the
effective date set forth below,  unless sooner terminated as provided  elsewhere
in this AGREEMENT (the "Initial Term"). At the end of the Initial Term, the term
of this AGREEMENT  shall be extended for  consecutive  twelve (12) month periods
(each such period is referred to as a "renewal  term"),  upon the same terms and
conditions,  unless  either  party gives the other party  written  notice to the
contrary at least  thirty (30) days prior to the end of the Initial  Term or any
renewal  term.  The Initial Term and each renewal  term are,  collectively,  the
Term.

2.  MANAGEMENT  SERVICES.  The  Center  hereby  grants to  Manager  the right to
supervise and direct the day-to-day  management and operation of the Center, and
Manager agrees to provide such  services,  upon the terms and conditions of this
AGREEMENT  and  subject at all times to  policies  and  control of the Center or
owner of the Center.  Without  limiting the  generality  of the  foregoing,  the
Center grants to Manager the right, and Manager agrees, to perform the following
services on behalf of the Center;

(a) to manage  the  administrative  and  business  operations  of the  Center as
Manager  determines  to be customary  and usual in the  operation of  comparable
medical diagnostic imaging center rendering comparable services;



<PAGE>


(b) to  hire,  promote,  discharge,  and  supervise  the  work of such  medical,
technical, business,  administrative, and maintenance personnel as Manager shall
deem  necessary or advisable in the  management  of the Center  pursuant to this
AGREEMENT;

(c) to hire,  promote  and  discharge  as shall be  appropriate  and  reasonably
required by the nature of the Center such  physician and  non-physician  medical
and  technical  personnel  as Manager  shall deem  necessary or advisable in the
operation  of the Center;  provided,  however,  that the Center  shall  maintain
complete  responsibility  for supervising  the actions of nursing  personnel and
medical  technicians.  Center  agrees to save and hold Manager  harmless for all
acts or  omissions  of  nursing  personnel  and  medical  technicians  under the
direction or supervision of a physician.  Manager shall exercise reasonable care
in the initial selection of such personnel and technicians; however, Center will
not be obligated to accept the services of  individuals  deemed by the Center to
be unqualified to perform technical or patient care services.

(d)  to  adopt  such  reasonable  rules,  policies  and  procedures  as  may  be
appropriate  for  the  orderly  operation  of the  Center  and the  delivery  of
administrative,  clerical and other management services. Center hereby agrees to
abide by such rules,  policies and  procedures  and to cooperate with Manager in
causing all personnel to abide by same;

(e) to procure medical and non-medical  supplies and equipment which Manager and
Center deem necessary for the operation of the Center from such suppliers and on
such terms as Manager may determine; Center shall promptly notify Manager if any
supplies or  equipment  are  defective  or  otherwise  unsatisfactory  for their
intended use. Manager expressly  disclaims any warranties of  merchantability or
fitness for a particular use with respect to supplies and equipment provided.

(f) to install  and  maintain  systems  for  accounting,  auditing,  and medical
records maintenance;

(g) as agent  for the  Center,  to  promptly  deposit  in  banking  institutions
selected by Center,  in a separate  account,  in the  Center's  name and for the
Center's benefit,  all moneys received by Manager as revenues from the Center or
otherwise for or on behalf of the Center;

(h) to fulfill the  obligations  of Center  under any existing  lease  affecting
medical or business equipment located in the Center, including payment of rental
when due, and to secure insurance as required by any such lease  agreement,  but
only to the extent of the funds in the bank  accounts  of the  Center.  Any such
lease  shall be reviewed  and  acknowledged  in writing by Manager  prior to the
execution of this AGREEMENT;

(j) to make or  install,  or cause to be made or  installed,  at the  expense of
Center,  and in the  name  of  the  Center,  all  mutually  agreed  alterations,
replacements,  additions  and  improvements  in  and to  the  office  facilities
excluding, however, extraordinary capital replacements, additions or repairs;

(j) to assist in the  application  for all licenses and permits  required of the
Center or Manager in connection with the management and operation of the Center;

(k) to cause,  at the request and expense of Center,  such other acts and things
to be  done  as  shall  be  reasonable  and  necessary  for  the  efficient  and
cost-effective operation of the Center.

(l) to contract,  on behalf of the Center, with a qualified  radiologist for the
performance of procedures,  for the  supervision of physician and  non-physician
technical  staff and to perform  the duties  and  responsibilities  of a medical
director.

(m) to act as an agent for the Center in the conduct of all  financial and legal
affairs, to include the engagement of legal, accounting and other professionals,
execution of binding  contracts  and  agreements,  loan  documents,  pledging of
center  assets for  purposes  of loan and other  financial  arrangements  as the
Manager deems appropriate in the operation of the Center.




<PAGE>


3.  Employees.  Manager shall not be liable to employees  employed by Center for
their wages, fringe benefits or other compensation.  Center shall be responsible
for payment of the total  aggregate  compensation,  including  fringe  benefits,
payable  with  respect to such  employees.  The term  "fringe  benefits" as used
herein shall mean and include Center's contribution of FICA, FUTA,  unemployment
compensation and other employment taxes, worker's  compensation,  group life and
accident and health  insurance  premiums,  incentive  bonuses and other  similar
benefits agreed to by Manager on behalf of the Center.

4. Fee.  As  compensation  for all  services  rendered  by  Manager  under  this
AGREEMENT,  the Center shall pay to Manager at its principal  office (or at such
other  place,  if any, as Manager  from time to time may  designate in a written
notice  to the  Center)  a  monthly  management  fee (the  "Management  Fee") of
$5,000.00  per month,  said  amount to be paid in advance on or before the first
day of the month, every month during the term of this AGREEMENT. The formula for
determining  the  Management Fee is not intended and shall not be interpreted or
applied  as  permitting  the  Manager  to  share  in the  Center's  fees.  It is
acknowledged  as the parties'  negotiated  agreement as to the  reasonable  fair
market value of the services  furnished by Manager  pursuant to this  AGREEMENT,
considering the nature and volume of the services required and the risks assumed
by the Manager.

The  payment  of the Fee to  Manager  will be  subordinate  to any loan or lease
payments  due under any loan or lease  between  Center and Prime  Leasing,  Inc.
("Prime")  or its  successors  or assigns.  In  addition,  payment of the Fee to
Manager will be suspended so long as Center is in default under any such loan or
lease  agreement  with Prime.  Manager  agrees to continue to perform under this
AGREEMENT during any period during which payment of the Fee has been suspended.

5. Payment of Expenses.  Center shall be  responsible  for making payment of all
operating  expenses  attributable  to the  operation  of Center  unless  Manager
specifically assumes payment as an obligation pursuant to this AGREEMENT.

6. Performance of Duties of Manager.  (a) Manager is an independent  contractor,
and not an  employee  or partner of the Center.  As an  independent  contractor,
Manager  shall not act or attempt to act, or in any manner  assume or create any
obligation  on behalf of or in the name of the Center or any of its  affiliates,
or otherwise bind the Center or any of its affiliates in any manner,  other than
as specifically  authorized in this AGREEMENT or otherwise authorized in writing
by the Center.

(b) Manager  shall devote its best  efforts to the  operation of the Center in a
reasonable  manner and shall  perform its  services  and  obligations  hereunder
diligently and according to the local  standards.  It is expressly  acknowledged
that Manager is engaged in operating a similar medical diagnostic imaging center
in Dallas and is providing  management services to the medical profession and is
in no way restricted or restrained from pursuing such other business activities.

7. Books and Records (a) Business Records.  Manager shall prepare and furnish to
the Center an unaudited statement of revenue and expenses of the Center, and any
other reports on the operations of the Center as may be reasonably  requested by
Center,  for each calendar  month during the term of this AGREEMENT on or before
the 25th day of the calendar month immediately following the month for which the
statement is being prepared.  Copies of all statements and reports shall be sent
to LDE Ventures,  Inc.,  10275 W. Higgins Rd.,  Suite 200,  Rosemont,  IL 60018.
Manager shall accord to the Center,  and its accountants,  attorneys and agents,
the right to  examine or inspect  any and all books or records  relating  to the
Center at all  reasonable  times  during the term of this  AGREEMENT,  and for a
period  of one year  following  the  termination  of this  AGREEMENT.  Books and
records of the Center may be kept at the Center or at such other location within
the Dallas metropolitan area as Manager may determine.

<PAGE>


(b) Medical  Records.  Manager  and Center  shall  cooperate  with the Center to
assure  preparation of appropriate  medical records  concerning medical services
provided by the Center.  Manager  shall  maintain  such  medical  records at the
Center in accordance  with prudent record keeping  procedures and as required by
law.

(c) Confidentiality of Records.  Manager and Center agree to take all reasonable
precautions  to prevent  the  unauthorized  disclosure  of any and all books and
records kept and/or  maintained by Manager under the terms of this AGREEMENT and
to keep such books and records  confidential except as otherwise provided by law
or in subparagraph (d) of this Paragraph.

(d) Disclosure of Records to  Governmental  Agencies.  To the extent required by
section l86l (v) (1) (I) of the Social  Security Act, the parties  hereto,  upon
proper  request,  shall allow the United  States  Department of Health and Human
Services, the Comptroller General of the United States, or their duly authorized
representatives  access  to this  AGREEMENT,  and to all  books,  documents  and
records  necessary  to verify  the  nature  and  extent of the cost of  services
provided  by either  party under this  AGREEMENT  at any time during the term of
this AGREEMENT and for an additional period of four (4) years following the last
date services are furnished under this AGREEMENT. In the event that either party
carries out any of its  obligations  under this  AGREEMENT  through an agreement
with an  organization  related to it,  such party  shall  require  that a clause
substantially to the effect of this subparagraph be included in that agreement.

8. Liability  Insurance.  (a) Manager shall maintain throughout the term of this
AGREEMENT,  at its sole expense,  and for a period not less than three (3) years
commencing  on the  date  of the  termination  of this  AGREEMENT,  professional
liability  insurance coverage on Manager and its employees in the minimum amount
$1,00,000.00 for each occurrence and Three Million Dollars  $3,000,000.00 in the
aggregate. Such insurance shall be obtained from an insurance carrier whose A.H.
Best  rating is A or better and  contain an  endorsement  to the effect that the
policy  shall not be canceled  or  materially  changed  without at least 30 days
prior  written  notice to  Manager.  The Center  shall  provide to Manager  upon
request a certificate of insurance such coverage.

(b) The Center shall maintain, at its sole expense,  throughout the term of this
AGREEMENT and for a period not less than three (3) years  commencing on the date
of the termination of this AGREEMENT,  professional liability insurance covering
(i) the Center in the minimum amount of $1,000,000  dollars for each  occurrence
and  $3,000,000  dollars in the  aggregate,  and (ii)  covering  each  physician
rendering medical services at the Center, whether they are members of the Center
or employees of the Center, or independent contractors, in the minimum amount of
$1,000,000  dollars for each occurrence and $3,000,000 dollars in the aggregate.
Such  insurance  shall be obtained  from an insurance  carrier  whose A.H.  Best
rating is A or better and contain an  endorsement  to the effect that the policy
shall not be  canceled  or  materially  changed  without  at least 30 days prior
written  notice to Manager.  The Center shall  provide to Manager upon request a
certificate of insurance such coverage.

9. Events of Default.  (a) The Center shall be in default  under this  AGREEMENT
upon the occurrence of any of the following events:

          (i) failure of the Center to comply with any term or condition of this
     AGREEMENT within fifteen days after written notice of such noncompliance by
     Manager;

          (ii) dissolution of the Center;

          (iii)bankruptcy of the Center.


<PAGE>


(b) Manager shall be in default under this  AGREEMENT upon the occurrence of any
of the following events:

          (i)  failure of Manager to comply with any term or  condition  of this
     AGREEMENT within fifteen days after written notice of such noncompliance to
     Manager by the Center; and

          (ii) bankruptcy of Manager;

(c) For purposes of this  paragraph the  bankruptcy of an entity shall be deemed
to have occurred when that entity (i) makes a general assignment for the benefit
of  creditors;  (ii) files a voluntary  bankruptcy  petition;  (iii) becomes the
subject of an order for relief or is declared  insolvent in any federal or state
bankruptcy or  insolvency  proceeding;  (iv) files a written  petition or answer
seeking a reorganization,  arrangement, composition, readjustment,  liquidation,
dissolution  or  similar  relief  under  any law;  (v)  files an answer or other
pleading admitting or failing to contest the material  allegations of a petition
filed  against  that entity in a proceeding  of the type  described in parts (i)
through (iv) of this subparagraph; (vi) seeks, consents to, or acquiesces in the
appointment of a trustee, receiver, or liquidator (vii) or l20 days expire after
the  date of the  commencement  of a  proceeding  against  that  entity  seeking
reorganization,    arrangement,    composition,    readjustment,    liquidation,
dissolution,  or similar  relief  under any law if the  proceeding  has not been
previously  dismissed,  or 90 days  expire  after  the date of the  appointment,
without  the  entity's  consent  or  acquiescence,  of a trustee,  receiver,  or
liquidator of that entity if the  appointment has not previously been vacated or
stayed,  or 90 days  expire  after  the  date of  expiration  of a stay,  if the
appointment has not previously been vacated.

(d) Upon the  occurrence  of an event of default of the  Center as  provided  in
subparagraph  (a) of this  paragraph,  Manager shall have the right to terminate
its obligations under this AGREEMENT, subject to the limitations of Paragraph 10
of this AGREEMENT,  and to pursue any other remedies available at law or equity,
and Manager's  termination of its  obligations  under this  AGREEMENT  shall not
constitute  a waiver or  forfeiture  of any rights or remedies  that Manager may
have including Manager's right to compensation.

(e) Upon the  occurrence  of an event of  default  of  Manager  as  provided  in
subparagraph (b) of this paragraph, the Center shall have the right to terminate
this  AGREEMENT  and to pursue  any other  remedies  available  at law or equity
against  Manager,  and  Center's  termination  of  its  obligations  under  this
AGREEMENT  shall not constitute a waiver or forfeiture of any rights or remedies
that Center may have.

10. Termination.  Either party may terminate this AGREEMENT at any time, without
cause, upon 45 days' advance written notice to the other, provided however, that
Manager may not terminate this AGREEMENT so long as Center has any loan or lease
agreement in effect with Prime.  Upon  termination of this AGREEMENT,  either at
the  expiration  of its term as  provided  in  Paragraph  l, or upon an event of
default as provided in Paragraph 9, or as provided in this Paragraph:

(a) Manager  shall  deliver to the Center as received  any moneys due the Center
under this  AGREEMENT but received by Manager after such  termination,  less any
amounts due Manager, including any due and unpaid Management Fees;

(b) Manager shall  deliver to the Center all  materials and supplies,  copies of
books and records,  keys,  contracts and documents,  and such other accountings,
paper and  records  pertaining  to the Center and this  AGREEMENT  as the Center
shall reasonably request;

(c) The  obligations of the parties hereto with respect to this AGREEMENT  shall
cease and  terminate,  except as to obligations of either party which shall have
heretofore accrued or arisen, or except as otherwise herein provided.

<PAGE>


11. Power of Attorney.  The Center hereby  constitutes and appoints  Manager and
its  authorized  representatives  (and  any  successor  thereto  by  assignment,
election,  or otherwise and the  authorized  representatives  thereof) with full
power of  substitution as its true and lawful agent and  attorney-in-fact,  with
full power and authority in its name,  place, and stead (i) to bill patients and
collect accounts  receivable,  (ii) on behalf of the Center, to receive and give
receipts  for all  insurance,  Medicare,  and Medicaid  payments  payable to the
Center,  (iii) to take  possession  of,  endorse in the name of the Center,  and
deposit in the Center's bank account any cash, notes,  checks,  money orders, or
other instruments received by Manager or the Center relating to the operation of
the Center,  (iv) to pledge  receivables and other Center assets for purposes of
obtaining financing and obtaining equipment for the Center as the Manager solely
deems  appropriate,  and (v) to  contract  with  third  parties on behalf of the
Center  for  the  purposes  of  procuring  equipment,   office  space,  supplies
professional consultants,  attorneys and accounting professionals as the Manager
solely deems appropriate.

12. Relationship of the Parties. Nothing in this AGREEMENT shall be construed as
creating a company or joint  venture  between  Manager  and the Center and in no
event shall Manager  participate in or be responsible  for the profits or losses
of the Center. Except to the extent that Manager may act as billing,  collecting
and  disbursing  agent for the Center,  neither party is the agent of the other.
Center  shall  require  any  employee  or  independent  contractor  who works in
conjunction  with Center under this  AGREEMENT  to  expressly  abide by each and
every term and condition of this  AGREEMENT  and to evidence  such  agreement in
writing as required by Manager.

13. Standard of Care. Although Manager's obligation to obtain office facilities,
equipment,  supplies  and  services  is  limited  to the  quantity  and  quality
ordinarily  required by members of the same  profession as Center,  according to
the generally  accepted  standards of care  prevailing  in the local  community,
Center is not  restricted  to such  standard  and is at all times  free to equip
Center according to higher or more specialized standards;  however, Center shall
be  responsible  for  making  separate   arrangements   for  any   extraordinary
requirements for office  facilities,  equipment,  services or supplies resulting
from  such  choice  to  Center  according  to such  higher  or more  specialized
standards.

14. Limitation of Liability. Manager shall not be liable for any claim or demand
on account of damages  arising  out of, or in any  manner  connected  with,  any
injuries  suffered by persons  receiving  care  provided  by, or  authorized  by
Center,  unless such injury is approximately  caused by proven negligence on the
part of the Manager.  Center shall not be liable for any claim or demand arising
out of the acts or omissions of the Manager,  except to the extent, if any, that
Center is negligent in exercising direct professional  supervision and direction
of those of the Manager's employees who are assigned to assist the Center in the
care of  patients.  The amount of  Manager's  liability  for any  default in its
obligations  hereunder shall be limited to the amount of the liability insurance
carried by Manager  pursuant to Section 8(a), and no incidental or consequential
damages in excess of such amount may be recovered.

15. Grant of License.  Licensor grants to Licensee a non-exclusive  license,  to
use the name " PHYMED  DIAGNOSTIC  IMAGING  CENTER " and any logo's  existing or
created by Licensor,  in connection with its business and advertising  until the
expiration or cancellation  of this AGREEMENT.  Upon written notice to Licensor,
Licensee shall have the right to extend the terms of this AGREEMENT to any other
entity  operating under the authority and control of Licensee in accordance with
the provision hereinafter set forth.

16. Approval by Licensor. All operations, training programs, medical procedures,
advertising and promotional materials shall be submitted by Licensee to Licensor
for Licensor's approval prior to any release thereof by Licensee. If disapproval
is not received by Licensee  within ten days after  receipt of such  material or
matters by  Licensor,  such right of  approval  shall be deemed  waived and such
material shall be considered  approved.  Licensor's rights are hereby restricted
solely to the material and matter covered by this  paragraph.  Such approvals by
Licensor shall not be unreasonably  withheld,  and once such approvals have been
obtained  further  approval  need not be  obtained  for future or repeat use. No
procedures  or  materials  shall be used or  continued  without the  approval of
Licensor as herein provided.

<PAGE>


17. Inspection.  The Licensee will permit duly authorized representatives of the
Licensor to inspect,  on the premises of the Licensee,  at all reasonable times,
the operations of the licensee.

18.  Indemnity.  The  Licensor  assumes no Liability to the Licensee or to third
parties with respect to the performance of the procedures, training or treatment
conducted  under the license,  and the  Licensee  hereby  indemnifies  and holds
harmless  the  Licensor  against all losses,  damages  and  expenses,  including
attorneys'  fees,  incurred  as result of or related to claims of third  persons
involving  the  delivery  of health  care to patients or training to health care
providers resulting from the acts or omissions of the Licensee.

19.   Miscellaneous.

(a)  Prohibited  Activities.  Manager  shall not provide or otherwise  engage in
services which constitute the unauthorized practice of medicine under applicable
Texas Law.

(b)   Communications  to be given under this AGREEMENT by any party to the other
      shall be deemed to have been duly given if given in writing and personally
      delivered, sent by facsimile followed by mail, or sent by mail, registered
      or  certified,  postage  prepaid  with return  receipt  requested,  at the
      address  specified  beside  each  party's  signature  at the  end of  this
      AGREEMENT.  Notices  delivered  personally  or by  mail  shall  be  deemed
      communicated as of l0:00 a.m. on the third business day after mailing. Any
      party may change its address for notice hereunder by giving notice of such
      change in the manner provided in this paragraph.

      Chairman                                       President
      PhyMed Contracted Services, Inc..              White Rock JV, Ltd.
      9603 White Rock Trail                          9603 White Rock Trail
      Suite 100                                      Suite 100
      Dallas, Texas 75238                            Dallas, Texas 75238
      Fax 214-349-7474                               Fax 214-349-7474

      A copy of all  communications  to be given under this AGREEMENT shall also
      be provided in the same manner as above to:

      LDE Ventures, Inc.
      10275 W. Higgins Rd, Suite 200
      Rosemont, IL 60018
      Fax 847-294-6070

(c) Entire  Agreement.  This AGREEMENT  supersedes any and all other agreements,
either oral or written,  between the parties with respect to the subject  matter
hereof and contains all of the covenants and agreements between the parties.


<PAGE>


(d) Modification  and Waiver.  No change or modification of this AGREEMENT shall
be valid or binding upon the parties unless such change or modification shall be
in writing and signed by all the parties.  No waiver of any term or condition of
this AGREEMENT shall be enforceable  unless it shall be in writing signed by the
party against which it is sought to charged. The waiver by any party of a breach
of any  provision  of this  AGREEMENT  by any  other  shall  not  operate  or be
construed as a waiver of any subsequent breach by such other party.

(e) Governing Law. This AGREEMENT, and the rights and obligations of the parties
hereto,  shall be governed by and construed in  accordance  with the laws of the
State of Texas and shall be performable in Dallas  County,  Texas.  Venue of any
litigation  arising  hereunder shall be in a court of competent  jurisdiction in
Dallas County, Texas.

(f) Counterparts.  This AGREEMENT may be executed in counterparts, each of which
shall constitute an original, but all of which shall constitute one and the same
document. Any counterpart evidencing signature by one party that is delivered by
telecopy by such party to the other party hereto shall be binding on the sending
party when such  telecopy is sent,  and such sending party shall within ten days
thereafter  deliver to the other party a hard copy of such executed  counterpart
containing   the   original   signature   of  such   party  or  its   authorized
representative.

(g)  Costs.  If any  action at Law or in  equity  is  necessary  to  enforce  or
interpret the terms of this AGREEMENT, the prevailing party shall be entitled to
reasonable  attorneys' fees,  costs, and necessary  disbursements in addition to
any other relief to which it may be entitled.

(h) Assignment. Center may assign its rights under this AGREEMENT to any partner
or affiliate of any partner  without the prior consent of Manager.  No party may
otherwise assign any rights or delegate any duties under this AGREEMENT  without
the prior  written  consent of the other  party  hereto,  which  consent  may be
withheld in that party's sole discretion.

(i) Binding  Effect.  This AGREEMENT  shall be binding upon the parties  hereto,
together with their respective successors, and permitted assigns.


<PAGE>


(j)  Severability.  If any  provision  of this  AGREEMENT is held to be illegal,
invalid or unenforceable  under present or future laws effective during the term
hereof,  such provision  shall be fully  severable and this  AGREEMENT  shall be
construed and enforced as if such illegal,  invalid or  unenforceable  provision
never comprised a part of this AGREEMENT;  and the remaining  provisions of this
AGREEMENT shall remain in full force and effect and shall not be affected by the
illegal,  invalid  or  unenforceable  provision  or by its  severance  herefrom.
Furthermore,  in lieu of such illegal, invalid or unenforceable provision, there
shall be added  automatically as part of this AGREEMENT,  a provision as similar
in its terms to such  illegal,  invalid  or  unenforceable  provision  as may be
possible and be legal, valid and enforceable.

(k) Language.  Whenever the context  requires,  references in this AGREEMENT to
the singular  number shall  include the plural,  the plural number shall include
the singular,  and words denoting gender shall include the masculine,  feminine,
and neuter.  Section headings in this AGREEMENT are for convenience of reference
only and shall not be considered in construing or interpreting this AGREEMENT.

(l) Further  Actions.  Each party to this  AGREEMENT  shall  perform any and all
further acts and execute and deliver any and all documents and instruments  that
may be reasonably necessary to carry out the provisions of this AGREEMENT.

(m) Third Party  Beneficiary.  Manager and Center hereby  acknowledge  and agree
that the Center's owner is deemed a third party  beneficiary of this  AGREEMENT,
and that  Manager's  agreement to perform  duties  hereunder run directly to the
benefit of Center's owner.

IN WITNESS  WHEREOF,  the parties have caused this  AGREEMENT to be executed and
effective this _________ day of ____________________ , 2000.



   FOR THE MANAGER:                             FOR THE CENTER:

   By:                                          By:
      -----------------------------------           ---------------------------
      Bill Ward, VP Business Development            GEORGE C. BARKER, President

   PhyMed Contracted Services, INC.             PHYMED DIAGNOSTIC IMAGING-WHITE
   9603 White Rock Trail                        ROCK, INC., the General Partner
   Suite 100                                    9603 White Rock Trail, Suite 100
   Dallas, Texas 75238                          Dallas, Texas 75238




























                                  OFFICE LEASE

                     BASIC DEFINITIONS AND LEASE PROVISIONS

                            COMMERCE PLAZA HILLCREST

          A. The  following  list sets out  certain  defined  terms and  certain
financial and other information pertaining to the lease:

          1. "Date of Lease":  September 8, 1999
                               ------------------------------------

          2.  "Landlord":  AETNA LIFE  INSURANCE  COMPANY,  C/O  ALLEGIS  REALTY
                           -----------------------------------------------------
INVESTORS, L.L.C.
- -----------------

          3.  Landlord's  address:  12001 North Central  Expressway,  Suite 650,
                                    --------------------------------------------
Dallas, TX 75243-3735
- ---------------------

               Contact:  Asset Management
                         ----------------

               Telephone:  972-458-3300        Facsimile:  972-490-9440
                          ---------------                  ------------

          4. "Tenant": PHYMED, INC., a Texas Corporation
                       ---------------------------------

          5. Tenant's address: 12840 Hillcrest Road, Suite E100
                               --------------------------------
Dallas, Texas  75230
- --------------------

              Contact:  Mr. George Barker
                        -----------------

              Telephone:                    Facsimile:
                         ------------------            ---------------------

          6.  Tenant's trade name:  PHYMED Diagnostic Imaging, Inc.
                                    -------------------------------

          7.  "Building":  Landlord's  property  located  in the City of Dallas,
Dallas  County,  Texas,  which  property is  described  or shown on Exhibit "A",
attached to the Lease.                                              -----------

          8. "Premises": A unit in the  Building containing  approximately 8,472
square feet in rentable area (measured by calculating  lengths and widths to the
exterior of outside walls and to the center of interior walls, without decuction
for any columns or projections necessary to the building, and, if applicable,  a
proportionate  share of any common  areas  located on the  floor(s) on which the
Premises is located and a  proportionate  share of any of the Building's  public
areas,  management  office,  engineer's  office,  and mechanical  spaces,  e.g.,
service  areas housing  communications,  HVAC,  plumbing,  fire  protection  and
elevator  equipment),  being known as Suite E100 and being described or shown on
Exhibit  "B",  attached to the Lease.  With regard to Exhibit  "B",  the parties
agree  that the  exhibit is  attached  solely for the  purpose of  locating  the
Building  and the  Premises  within  the  Building  and that no  representation,
warranty,  or  covenant is to be implied by any other  information  shown on the
exhibit (i.e., any information as to buildings, tenants or prospective tenants,


<PAGE>

etc.  is subject to change at any time).  Should a party  desire to measure  the
square footage of the Premises, it must do so at the time of construction of any
leasehold  improvements  prior  to the  Commencement  Date,  or if no  leasehold
improvements are to be constructed, then prior to the Commencement Date. If such
measurement  reflects a different  number,  then,  subject to the other  party's
verification of the number,  the parties agree to make adjustments based on such
measurement. In the event of a dispute regarding the method of calculation,  the
parties agree that the standards for  measurement set by the Building Owners and
Managers  Association  ("BOMA")  shall govern and control.  If no measurement is
made  prior to the  Commencement  Date,  then the  parties to this Lease will be
deemed to have  accepted the number  contained  herein as the square  footage of
rentable area of the Premises  throughout the Lease Term,  subject to adjustment
only for any subsequent additions or deletions of space.

          9. "Commencement Date": September 1, 1999, subject  to  extension  for
any delay other than a Tenant Delay (as defined in Exhibit "E").
                                                   -----------

          10. "Lease Term":  Commencing on the Commencement  Date and continuing
for  Sixty  (60)  months  after  the  Commencement  Date;  provided  that if the
Commencement  Date is a date other than the first day of a calendar month,  then
the Lease Term shall be extended  so that it expires at the end of the  calendar
month following the expiration of the months noted herein.

          11.  "Base  Rental":  The total  Base  Rental  for the Lease Term is $
826,020.00 , payable as follows:

                Month(s)   Amount per s.f.   Amount per year    Amount per month

                 1-60       $19.50            $165,204.00        $13,767.00

          12. "Base Expense Stop": 1999 Base Year
                                   --------------

          13. "Tenant's Pro Rata Share":3.68 %, which is the percentage obtained
by dividing (a) the square  footage of rentable  area of the Premises by (b) the
square footage of rentable area of the Building.

          14.  "Prepaid  Rental":  $ N/A , being an estimate of the Base Rental,
for the N/A  month(s)  of the Lease  Term,  such  prepaid  rental  being due and
payable upon execution of this Lease.

          15. "Security Deposit":  $ 55,068.00 , such Security Deposit being due

and payable upon execution of this Lease. If at the end of the 57th month of the
term of the  Lease,  Tenant is not,  and has never been in default of the Lease,
then $41,301.00 of the Security Deposit shall be credited toward the 58th, 59th,
and 60th months' Base Rental as herein defined.


          16.  "Permitted  Use":  Imaging  Center  only and for no other  use or
purpose.  Tenant  acknowledges that the above specification of a "Permitted Use"
means only that  Landlord  has no objection  to the  specified  use and does not
include any  representation  or warranty by  Landlord  that such  specified  use
complies with applicable laws and/or requires special governmental permits.

          17. "Rent" or "rental":  All amounts due from Tenant to Landlord under
Section 4.5 of the Lease), are deemed to be "rent" or "rental".

          18. "Brokers":  Kennedy-Wilson Properties of Texas, Ltd.
                          ----------------------------------------

          B. The foregoing Basic Lease Information is incorporated into and made
a part of the lease. If any conflict exists between any Basic Lease  Information
and the Lease, then the Lease shall control.



<PAGE>



         IN WITNESS WHEREOF,  Landlord and Tenant have entered into and executed
this Lease on the Date of the Lease written above.

LANDLORD:                                     TENANT:


AETNA LIFE INSURANCE COMPANY                  PHYMED, INC., a Texas Corporation

By:  Allegis Realty Investors, LLC,           By:
     Its Investment Advisor and Agent

                                              Printed Name: George Barker

By:                                           Title:  President
     --------------------------------

Name:  James G. Hughes
Title:  Vice President













<PAGE>


                                 LEASE AGREEMENT

                                    (Office)

         This  LEASE  AGREEMENT  (the "Lease") is entered into as of the Date of
Lease between AETNA LIFE  INSURANCE  COMPANY  ("Landlord")  and PHYMED,  INC., a
Texas Corporation ("Tenant").

                                    ARTICLE 1
                     BASIC DEFINITIONS AND LEASE PROVISIONS

         1.1 The  definitions  and  basic  provisions  set  forth  in the  Basic
Definitions and Lease Provisions  executed by Landlord and Tenant,  and attached
hereto, are incorporated herein by reference for all purposes.

                                    ARTICLE 2
                                   LEASE GRANT

         2.1 Subject to the terms and conditions of this Lease,  Landlord leases
to Tenant, and Tenant leases from Landlord, the Premises for the Lease Term.

         2.2 In addition,  Tenant is granted the  non-exclusive  right to use in
common with the other  tenants and  occupants the parking and other common areas
of the  Building,  as such may be modified  from time to time by  Landlord.  The
grant herein provided shall not include any easement for light or air.

                                    ARTICLE 3
                      DELIVERY OF THE PREMISES; LEASE TERM

         3.1 The Lease  Term shall be for the  period of time  specified  in the
Basic Definitions and Lease Provisions,  beginning on the Commencement  Date, as
such date may be adjusted  herein,  and expiring on the Expiration Date. If this
Lease is executed before the Premises become vacant, or otherwise available,  or
if any present  tenant or  occupant of the  Premises  holds over,  and  Landlord
cannot acquire  possession of the Premises to deliver to Tenant,  or if Landlord
is obligated  to  construct  leasehold  improvements  in the Premises  under the
provisions of Exhibit "E", but is unable to complete the leasehold  improvements
by the Commencement Date due to an unavoidable delay, as defined in Exhibit "E",
then Landlord shall not be deemed to be in default hereunder,  and Tenant agrees
to accept possession on such date as Landlord is able to deliver  possession and
the Commencement  Date shall be postponed  accordingly.  Thereafter,  this Lease
shall continue for the full number of months set forth in the Lease Term. Except
for a postponement of the Commencement Date, this Lease shall not be affected by
any failure to deliver possession as a result of an event noted above and Tenant
shall have no claim for damages  against  Landlord as a result  thereof,  all of
which claims are hereby waived and released by Tenant.

         3.2  If  Tenant  takes   possession  of  the  Premises   prior  to  the
Commencement  Date for any reason,  then such possession shall be subject to all
the terms and conditions of the Lease and Tenant shall pay Base Rental and other
rent to  Landlord  on a per diem  basis for each day of  occupancy  prior to the
Commencement  Date at the rate  payable  for the first  month of the Lease Term.
Tenant  shall not,  however,  be  obligated to pay Base Rental and other rent to
Landlord prior to the Commencement  Date if such early occupancy is only for the
purpose of  constructing  leasehold  improvements if Tenant is required to do so
under the provisions of Exhibit "E".

         3.3 By  taking  possession  of the  Premises,  it shall  be  conclusive
evidence that Tenant has inspected  the Premises (and has  sufficient  knowledge
and expertise to make such inspection or has caused the Premises to be inspected
on its behalf by one or more persons with such  knowledge and  expertise),  that
Tenant has accepted the Premises and Building as being in good and  satisfactory
condition,  suitable for the purposes  herein  intended and that the same comply
fully with Landlord's  covenants and obligations under the Lease with respect to
the  construction  of leasehold  improvements,  except for any  punchlist  items
agreed  to in  writing  by  Landlord  and  Tenant,  if  Landlord  performed  the
construction  of leasehold  improvements.  Tenant  acknowledges  and agrees that
Landlord has made no representation or warranty,  express or implied,  as to the
habitability,  suitability,  quality,  condition  or fitness of the  Premises or
Building,  and Tenant  waives,  to the extent  permitted by applicable  law, any
defects in the Premises or Building and any claims arising  therefrom,  save and
except those arising from any  construction  or repair  obligations  of Landlord
expressly provided for in the Lease.

<PAGE>


         3.4  Following  the  Commencement   Date,   Landlord  shall  prepare  a
Commencement  Date  Letter in the form  attached  hereto as Exhibit  "F" setting
forth the Commencement Date, Expiration Date, and confirming Tenant's acceptance
of the Premises and that  Landlord has  performed  all of its  obligations  with
respect to delivery of the Premises, except as to any punchlist items previously
specified  in writing and related to any  construction  performed  by  Landlord.
Tenant shall execute and deliver the Commencement Date Letter to Landlord within
ten (10) days after delivery by Landlord.

                                    ARTICLE 4
                                      RENT

         4.1 Tenant  promises and agrees to pay Landlord at  Landlord's  address
set forth in the Lease, or such other address as Landlord may provide to Tenant,
the Base Rental and all other rent charged under this Lease without deduction or
set off, for each month of the entire Lease Term. The first monthly  installment
of Base Rental shall be payable by Tenant to Landlord contemporaneously with the
execution of the Lease, and thereafter, a monthly installment of Base Rental, as
may be adjusted in accordance with the provisions of the Lease, shall be due and
payable, in advance, without notice or demand on or before the first day of each
succeeding  calendar  month  during  the Lease  Term.  The Base  Rental  for any
fractional month at the beginning or end of the Lease Term shall be prorated.

         4.2 The Base Rental is determined,  in part, on Landlord's  estimate of
Basic Costs  incurred by Landlord  each year in connection  with its  ownership,
operation  and  management  of the  Building.  In the event that the Basic Costs
increase, or are estimated by Landlord to increase,  above the levels charged to
Landlord on the Date of the Lease,  Landlord  shall  charge to Tenant and Tenant
agrees to pay as additional rental Tenant's Pro Rata Share of any such increases
in Basic Costs in accordance with the provisions of Exhibit "C".

         4.3 The Security  Deposit  shall be paid to Landlord  contemporaneously
with the  execution  of the  Lease.  Landlord  shall hold the  Security  Deposit
without  liability for interest and as security for the performance by Tenant of
Tenant's   covenants  and  obligations  under  the  Lease,  it  being  expressly
understood  that such  deposit  shall not be  considered  an advance  payment of
rental or a measure of Landlord's damages in case of default by Tenant. Upon the
occurrence  of any Event of Default by Tenant,  Landlord may, from time to time,
without  prejudice to any other remedy,  use the Security  Deposit to the extent
necessary  to make  good any  arrearage  of rent and any other  damage,  injury,
expense or liability caused to Landlord by such Event of Default.  Following any
such application of the Security Deposit, Tenant shall pay to Landlord on demand
the amount so applied in order to restore the  Security  Deposit to its original
amount. If Tenant is not then in default of this Lease, any remaining balance of
the Security Deposit shall be returned by Landlord to Tenant upon termination of
the Lease.  If Landlord  transfers its interest in the Premises during the Lease
Term,  Landlord may assign the Security Deposit to the transferee and thereafter
shall have no further liability for the return of the Security Deposit.

         4.4 Tenant  hereby  acknowledges  that late payment to Landlord of rent
due  hereunder  will  cause  Landlord  to  incur  costs  and  inconvenience  not
contemplated by the Lease, the exact amount of which will be extremely difficult
to  ascertain.  If any rent due from  Tenant  is not  received  by  Landlord  or
Landlord's designated agent within ten (10) days after its due date, then Tenant
shall pay to Landlord as a late charge ten percent (10%) of such overdue amount,
plus any attorney's  fees incurred by Landlord by reason of Tenant's  failure to
pay rent when due  hereunder.  The parties  hereby  agree that such late charges
represent a fair and reasonable estimate of the cost that Landlord will incur by
reason of Tenant's  late  payment.  Landlord's  acceptance  of such late charges
shall not  constitute a waiver of Tenant's  default with respect to such overdue
amount or estop  Landlord from  exercising  any of the other rights and remedies
granted hereunder.

         4.5 All  payments  required  of  Tenant  under  the  Lease  shall  bear
interest,  beginning  on the day after the due date  until paid at the lesser of
twelve  percent  ( 12  %)  per  annum  or  the  maximum  lawful  rate  ("Default
Interest").  In no  event,  however,  shall the  charges  permitted  under  this
paragraph or elsewhere in the Lease, to the extent the same are considered to be
interest under applicable law, exceed the maximum lawful rate of interest.

         4.6 No payment by Tenant or receipt by Landlord of a lesser amount than
the rent due under this lease shall be deemed to be other than on account of the
earliest rent due hereunder, nor shall any endorsement or statement on any check
or any letter  accompanying any check or payment as rent be deemed an accord and
satisfaction, and Landlord may accept such check or payment without prejudice to
Landlord's  right to  recover  the  balance  of such rent or to pursue any other
remedy provided in this lease or at law or in equity.

<PAGE>


                                    ARTICLE 5
                                    SERVICES

         5.1  Provided  no Event  of  Default  exists,  Landlord  shall  use all
reasonable efforts to furnish to Tenant the following  services:  (i) water (hot
and cold) at those  points of supply  provided for general use of tenants of the
Building; (ii) heated and refrigerated air conditioning ("HVAC") as appropriate,
during Normal Business Hours (which shall be on generally accepted business days
from  6:30am  to  8:30pm ,  Monday  through  Friday  and  8:00am  to  4:00pm  on
Saturdays),  and at such  temperatures  and in such  amounts  as are  reasonably
considered by Landlord to be standard;  (iii) janitorial  service  comparable to
that  provided in other  office  buildingson  business  days (if Tenant's use or
floor covering or other leasehold  improvements  require special services,  then
Tenant shall, at Landlord's option, either retain another cleaning contractor to
perform such services  [with  Landlord's  approval] or pay the  additional  cost
reasonably  determined  by Landlord  attributable  to the special  services,  as
additional  rent) and such window washing as may from time to time in Landlord's
judgment be reasonably required;  (iv) if a multi-floor building, then elevators
for ingress and egress to the floor on which the Premises are located, in common
with other tenants,  provided that Landlord may  reasonably  limit the number of
elevators in operation at times other than during  customary  business hours and
on holidays;  (v) replacement of  Building-standard  light bulbs and fluorescent
tubes;  and (vi)  electrical  current  other  than  for  lighting  or  equipment
requiring  more than 110 volts,  or other than for  lighting or  equipment  with
electrical  energy  consumption  that exceeds  normal office usage as reasonably
determined by Landlord. If Tenant desires any HVAC service after Normal Business
Hours,  such  service  shall be supplied  to Tenant upon the written  request of
Tenant  delivered  to  Landlord  before 3 p.m.  on the  business  day before the
service is to be  provided,  and Tenant  shall pay to Landlord  the cost of such
service  with the next due  installment  of  monthly  rent  after  Landlord  has
delivered to Tenant an invoice therefor.

         5.2 Tenant shall not install any electrical equipment requiring special
wiring  or  voltage  in  excess of 110  volts or  otherwise  exceeding  Building
capacity unless approved in advance by Landlord. If approved, Landlord shall use
reasonable  efforts to furnish electrical current for such lighting or equipment
through the  then-existing  feeders  and risers  serving  the  Building  and the
Premises,  and Tenant  shall pay to Landlord  the cost of such  service with the
next due  installment(s)  of monthly rent after Landlord has delivered to Tenant
an invoice  therefor.  Landlord  may  determine  the  amount of such  additional
consumption  and  potential  consumption  by  either  or both:  (i) a survey  of
Tenant's  potential  usage of electricity and that of standard or average tenant
usage  of  electricity  in the  Building  performed  by a  reputable  consultant
selected by  Landlord  and paid for by Tenant;  or (ii) a separate  meter in the
Premises installed, maintained, and read by Landlord, at Tenant's expense. In no
event  will the use of  electricity  in the  Premises  exceed  the  capacity  of
existing feeders and risers to or wiring in the Premises.  If additional  risers
or  wiring  are  required  to  meet  Tenant's  excess  electrical  requirements,
Landlord, in it sole and absolute judgment, may elect to permit same at the sole
cost and expense of Tenant,  provided such additional feeders, risers or wirings
shall not cause  permanent  damage or injury to the  Building  or the  Premises,
cause or  create  a  dangerous  or  hazardous  condition,  entail  excessive  or
unreasonable  alterations,  repairs,  or expenses,  or interfere with or disturb
other  tenants of the  Building.  If Tenant uses  machines or  equipment  in the
Premises which affect the standard  temperature  otherwise maintained by the air
conditioning system, Landlord may install supplemental air conditioning units or
other supplemental  equipment in the Premises,  and the cost thereof,  including
the cost of  installation,  operation,  use, and  maintenance,  shall be paid by
Tenant to Landlord  with the next due  installment  of rent after  Landlord  has
delivered to Tenant an invoice therefor.

         5.3 Landlord's  obligation to furnish  services under Section 5.1 shall
be subject to the rules and  regulations  of the  supplier of such  services and
governmental rules and regulations. Landlord may, upon not less than thirty (30)
days'  prior  written  notice to  Tenant,  discontinue  any such  service to the
Premises,  provided  Landlord  first  arranges for a direct  connection  thereof
through the supplier of such service.  Tenant shall, however, be responsible for
contracting  with the supplier of such service and for paying all deposits  for,
and costs relating to, such service.

<PAGE>


         5.4 Failure to any extent to  furnish any  service  described  above or
any stoppage or  interruption  of those services  resulting from any cause shall
not render  Landlord  liable in any respect for damages,  nor be construed as an
eviction  of  Tenant or work an  abatement  of rent,  nor  relieve  Tenant  from
fulfillment of any covenant or agreement contained in the Lease.

                                    ARTICLE 6
                                       USE

         6.1 Tenant shall use the Premises  only for the Permitted  Use.  Tenant
will not occupy or use the Premises, or permit any portion of the Premises to be
occupied or used,  for any business or purpose  other than the  Permitted Use or
for any use or purpose  which is  unlawful or deemed to be  disreputable  in any
manner, or dangerous to life, limb or property,  or extrahazardous on account of
fire, nor permit anything to be done which will in any way increase the premiums
for insurance  coverage on the Building or contents  therein,  or invalidate any
insurance coverage on the Building. Tenant will conduct its business and control
its  agents,  employees  and  invitees  in such a manner  as not to  create  any
nuisance, nor interfere with, annoy or disturb other tenants or Landlord, in the
management of the  Building.  Tenant will not commit waste and will maintain the
Premises in a clean, healthful and safe condition and will comply with all laws,
ordinances,  orders, rules and regulations (state, federal, municipal, insurance
and other agencies or bodies having any jurisdiction  thereof) with reference to
the use, condition or occupancy of the Premises,  including, without limitation,
all  environmental,  health and safety laws and the Americans with  Disabilities
Act. Tenant will secure at its own expense all permits and licenses required for
the  transaction of business from the Premises in accordance  with the Permitted
Use.  Tenant  will  receive or take  delivery of goods or  merchandise  and will
remove all garbage and trash only in the manner and areas prescribed by Landlord
from time to time.  Tenant  will not  display or sell  merchandise  outside  the
exterior  walls and  doorways  of the  Premises  and may not use such  areas for
storage.  Tenant will not keep any substance or carry on or permit any operation
which might emit offensive  odors or conditions into other parts of the Building
or use any apparatus which might make undue noise or vibrations in the Building.
Tenant  further  agrees not to install  any  exterior  lighting,  amplifiers  or
similar devices or use in or about the Premises an advertising  medium which may
be heard or seen outside the Premises,  such as flashing  lights,  searchlights,
loudspeakers, phonographs or radio broadcasts.

         6.2 Tenant will, and will cause all its employees,  agents, contractors
and invitees to,  comply  fully with all rules and  regulations  of the Building
adopted by Landlord from time to time. A copy of the rules and  regulations  for
the Building,  existing on the Date of the Lease, are attached hereto as Exhibit
"D".  Landlord  shall at all  times  have the  right to  change  such  rules and
regulations  or to promulgate  other rules and  regulations  in such  reasonable
manner as may be deemed  advisable for the safety,  care, or  cleanliness of the
Building or Premises,  and for the  preservation  of good order therein,  all of
which rules and regulations,  changes and amendments will be forwarded to Tenant
in writing and shall be carried out and observed by Tenant.

                                    ARTICLE 7
                                     SIGNAGE

         7.1 Tenant  shall not install any signs,  window or door  lettering  or
advertising  media of any type in, on or about the Premises or any part thereof,
except for such tenant  identification  information  as  Landlord  permits to be
included or shown on any directory maintained in the front lobby of the Building
and  adjacent to the access door or doors to the Premises or such other items as
Landlord  approves.  Should  Landlord  agree in writing to any of the  foregoing
items, Tenant agrees to maintain same in good condition and repair at all times.

                                    ARTICLE 8
                                  COMMON AREAS

         8.1 The use and  occupation by Tenant of the Premises shall include the
use in common with others entitled thereto of the common areas. The term "common
areas" shall mean those portions of the Building  intended for the common use of
all tenants including, among other facilities, the parking areas, service roads,
loading facilities, sidewalks, and such other facilities as may be designated by
Landlord from time to time as common areas,  subject,  however, to the terms and
conditions of this Lease and to the rules and  regulations  governing the use of
the common areas as  prescribed  from time to time by Landlord.  Landlord  shall
have the right  from  time to time to  change  the  area,  level,  location  and
arrangement of the common areas.

<PAGE>


         8.2 The common  areas  shall at all times be  subject to the  exclusive
control and  management of Landlord.  Landlord shall police the common areas and
maintain them in good condition and repair throughout the Lease Term.

         8.3 All common areas and  facilities,  which Tenant may be permitted to
use are to be used under a revocable license,  and if such areas are diminished,
Landlord  shall not be subject to any  liability nor shall Tenant be entitled to
any compensation or diminution or abatement of rent, nor shall the diminution of
such areas be deemed constructive or actual eviction.

         8.4 Tenant shall have the right to park in the parking  areas in common
with other tenants of the Building upon such terms and conditions established by
Landlord  at any time  during the Lease  Term,  including  the  imposition  of a
reasonable parking charge if required by governmental  authority or as otherwise
provided for in the Lease. Tenant agrees not to overburden the parking areas and
agrees to cooperate  with  Landlord and the other  tenants in use of the parking
areas.  Landlord  reserves  the right in its  absolute  discretion  to determine
whether the parking areas are becoming  overburdened  and to allocate and assign
parking  spaces among Tenant and other tenants,  and to reconfigure  the parking
areas and modify the  existing  ingress to and egress from the parking  areas as
Landlord shall deem appropriate.

                                    ARTICLE 9
                                   ALTERATIONS

         9.1 Any leasehold improvements to the Premises contemplated by Landlord
and  Tenant to be made  prior to the  commencement  of the Lease  Term  shall be
performed in accordance with the provisions of Exhibit "E".

         9.2 Other than any leasehold improvements to be made under Section 9.1,
Tenant  shall not  make,  or allow to be made,  any  alterations,  additions  or
improvements to the Premises without the prior written approval of Landlord. All
alterations,  additions  or  improvements  installed  on the  Premises by either
party,  including,  without limitation,  fixtures, but excluding readily movable
trade  fixtures,  shall become the property of Landlord at the expiration of the
Lease Term, unless Landlord requests their removal, in which event, Tenant shall
remove any such alterations,  additions or improvements and restore the Premises
to its original condition at Tenant's expense.

         9.3 Prior to commencing any construction  work on the Premises,  Tenant
must  furnish to  Landlord  adequate  plans and  specifications  for the written
approval  of  Landlord.  Once  approved,  Tenant  shall not modify the plans and
specifications  without,  again,  obtaining  the written  approval of  Landlord.
Landlord's approval of the plans and specifications  shall not be deemed to be a
representation  by  Landlord  that such  plans and  specifications  comply  with
applicable  insurance  requirements,   building  codes,   ordinances,   laws  or
regulations.

         9.4 All  construction  work shall be  performed  only by Landlord or by
contractors and subcontractors approved in writing by Landlord. If Landlord does
not  perform  the  construction  work,  then  Tenant  shall  cause  all  of  its
contractors  and  subcontractors  to procure  and  maintain  insurance  coverage
against such risks and in such amounts as Landlord  may  reasonably  require and
with such  companies  as Landlord  may  reasonably  approve.  Landlord  may also
require  Tenant  to  furnish  a  payment  and   performance   bond,   reasonably
satisfactory  to Landlord  in an amount  covering  the cost of the  construction
work,  and/or  require  Tenant to obtain a waiver and  release of liens from all
contractors and  subcontractors  prior to commencement of the construction work.
Tenant agrees to indemnify Landlord and hold Landlord harmless against any loss,
liability  or damage  resulting  from any such  construction  work  performed by
Tenant or on Tenant's behalf.

         9.5 All construction work by, or on behalf of, Tenant must be performed
in a good and  workmanlike  manner in  accordance  with the  approved  plans and
specifications,  lien-free,  and in compliance  with all  governmental  laws and
requirements. Tenant shall only utilize new materials of a quality that is equal
or better than the quality of those materials already on the Premises.

         9.6 Tenant shall not permit any  mechanic's  liens to be filed  against
the Premises or the Building for any work  performed,  materials  furnished,  or
obligation incurred by or at the request of Tenant,  including,  but not limited
to, any work performed,  materials  furnished,  or obligations incurred by or at
the request of Tenant for construction performed under the provisions of Exhibit
"E".  If such a lien is filed,  then  Tenant  shall,  within ten (10) days after
Landlord has delivered notice of the filing to Tenant,  either pay the amount of

<PAGE>

the lien or diligently  contest such lien, in which event,  Tenant shall deliver
to Landlord a bond or other security  reasonably  satisfactory  to Landlord.  If
Tenant  fails to timely take  either  such  action,  then  Landlord  may, at its
election, pay the lien claim without inquiry as to the validity thereof, and any
amounts so paid, plus  Landlord's  expenses and an  administrative  fee equal to
fifteen percent (15%) of the amount paid, shall be paid by Tenant to Landlord as
additional rental within ten (10) days after Landlord has delivered to Tenant an
invoice  therefor.  No work  which  Landlord  permits  Tenant to  perform in the
Premises  shall be deemed to be for the  immediate use or benefit of Landlord so
that no mechanics or other lien shall be allowed  against the estate of Landlord
by reason of its consent to such work.

                                   ARTICLE 10
                                     REPAIRS

         10.1 Landlord shall not be required to make any repairs or replacements
of any kind or character on the Premises during the Lease Term except repairs to
the exterior walls,  corridors,  window,  roof and other structural elements and
equipment of the Building,  except when such repairs are caused by fire or other
casualty, in which event, the provisions of Article 13 shall govern and control.
Landlord  shall not be  responsible  for  termite,  or other  insect,  or vermin
eradication.  Subject to the provisions of any waiver contained in Section 12.2,
Landlord  shall not be required to make any  repairs  occasioned  by the acts or
negligence of Tenant, its agents,  employees,  contractors and invitees.  Tenant
shall give  immediate  written  notice to  Landlord  of the need for  repairs or
corrections  and Landlord  shall have a reasonable  time to make such repairs or
corrections. Landlord's liability hereunder shall be limited to the cost of such
repairs or  corrections.  Tenant  waives the  provisions  of any law  permitting
Tenant the right to make repairs and deduct the expense of such repairs from the
rent due under the lease.

         10.2 Landlord may, at its option and at the cost and expense of Tenant,
repair or replace any damage or injury done to the Building or any part thereof,
caused by Tenant, its agents,  employees,  contractors or invitees. Tenant shall
pay such costs, plus an administrative fee equal to fifteen percent (15%) of the
costs,  to  Landlord  on the next  date an  installment  of Base  Rental  is due
following  notice from Landlord of the costs.  Tenant further agrees  throughout
the Lease Term to maintain  and keep the interior of the Premises in good repair
and condition at Tenant's expense.

                                   ARTICLE 11
                            ASSIGNMENT AND SUBLETTING

         11.1 Tenant shall not,  without the prior  written  consent of Landlord
(which  Landlord may grant or deny in its sole  discretion),  (i) advertise that
any portion of the Premises is available for lease,  (ii) assign,  transfer,  or
encumber  this Lease or any estate or interest  herein,  whether  directly or by
operation of law,  (iii) permit any other entity to become  Tenant  hereunder by
merger, consolidation, or other reorganization (iv) if Tenant is an entity other
than a  corporation  whose stock is publicly  traded,  permit the transfer of an
ownership  interest in Tenant so as to result in a change in the current control
of Tenant,  (v) sublet any  portion  of the  Premises,  (vi) grant any  license,
concession, or other right of occupancy of any portion of the Premises, or (vii)
permit the use of the  Premises  by any  parties  other than  Tenant (any of the
events listed in Sections  11.1(ii)  through  11.1(vii) being a "Transfer").  If
Tenant  requests  Landlord's  consent to a Transfer,  then Tenant shall  provide
Landlord with a written  description of all terms and conditions of the proposed
Transfer,  copies of the proposed  documentation,  and the following information
about  the  proposed  transferee:  name  and  address;  reasonably  satisfactory
information  about its business and  business  history;  its proposed use of the
Premises;  banking,  financial,  and  other  credit  information;   and  general
references  sufficient to enable Landlord to determine the proposed transferee's
creditworthiness  and  character.   Tenant  shall  reimburse  Landlord  for  its
attorneys' fees and other expenses  incurred in connection with  considering any
request  for its  consent to a  Transfer.  If  Landlord  consents  to a proposed
Transfer,  then the  proposed  transferee  shall  deliver to  Landlord a written
agreement  whereby it expressly  assumes the  obligations  of Tenant  hereunder;
however,  any  transferee of less than all of the space in the Premises shall be
liable only for the obligations under this Lease that are properly  allocable to
the space  subject  to the  Transfer,  and only to the extent of the rent it has
agreed to pay  Tenant  therefor.  Landlord's  consent  to a  Transfer  shall not
release Tenant from  performing  its  obligations  under this Lease,  but rather
Tenant  and its  transferee  shall be jointly  and  severally  liable  therefor.
Landlord's  consent to any Transfer shall not waive Landlord's  rights as to any
subsequent  Transfers.  If an Event of Default  occurs while the Premises or any
part thereof are subject to a Transfer,  then Landlord, in addition to its other
remedies,  may collect  directly from such  transferee all rents becoming due to

<PAGE>

Tenant and apply such rents against Base Rental and other amounts due under this
Lease.  Tenant  authorizes its  transferees to make payments of rent directly to
Landlord upon receipt of notice from Landlord to do so.

         11.2 Landlord may, within thirty (30) days after submission of Tenant's
written request for Landlord's consent to a Transfer,  cancel this Lease (or, as
to a subletting or assignment, cancel as to the portion of the Premises proposed
to be  sublet  or  assigned)  as of the date  the  proposed  Transfer  was to be
effective.  If Landlord  cancels  this Lease as to any portion of the  Premises,
then this Lease shall cease for such  portion of the  Premises  and Tenant shall
pay  to  Landlord  all  Base  Rental  and  other  amounts  accrued  through  the
cancellation  date  relating  to the  portion  of the  Premises  covered  by the
proposed  Transfer and all brokerage  commissions paid or payable by Landlord in
connection  with this Lease that are  allocable to such portion of the Premises.
Thereafter,  Landlord may lease such portion of the Premises to the  prospective
transferee (or to any other person) without liability to Tenant.

         11.3 Tenant shall pay to Landlord,  immediately  upon receipt  thereof,
all compensation  received by Tenant for a Transfer that exceeds the Base Rental
and other  amounts  due under the  Lease,  excluding  any  amount due under this
Section 11.3 and allocable to the portion of the Premises covered thereby.

         11.4 Landlord may sell,  transfer,  assign or convey all or any part of
its interest in the Building  and the Lease and, in the event  Landlord  assigns
its  interest  in this  Lease,  Landlord  shall be  released  from  any  further
obligation  and  liabilities  hereunder,  and  Tenant  agrees to attorn and look
solely to Landlord's successor-in-interest for performance of such obligation.

                                   ARTICLE 12
                   INSURANCE; WAIVERS; SUBROGATION; INDEMNITY

         12.1 Tenant shall at its expense  procure and maintain  throughout  the
Lease Term the following  insurance  policies:  (i) commercial general liability
insurance in amounts of not less than $1,000,000 per occurrence, combined single
limit,  or such  other  amounts  as  Landlord  may from time to time  reasonably
require,  insuring Tenant,  Landlord and Landlord's agents against all liability
for injury to or death of a person or persons or damage to property arising from
the use and  occupancy of the Premises,  (ii)  contractual  liability  insurance
coverage  sufficient to cover Tenant's indemnity  obligations  hereunder,  (iii)
casualty  insurance,  including  "all  risks"  and  fire and  extended  coverage
insurance covering the full value of Tenant's leasehold  improvements,  personal
property and other property (including the property of others), located in or on
the Premises,  (iv)  workman's  compensation  insurance,  containing a waiver of
subrogation  endorsement  reasonably  acceptable to Landlord,  (v) comprehensive
automobile liability insurance, insuring Tenant, Landlord and Landlord's agents,
(vi) business interruption insurance, and (vii) such other insurance and in such
amounts as Landlord may reasonably require from time to time. Tenant's insurance
shall  provide  primary  coverage to Landlord when any policy issued to Landlord
provides  duplicate or similar coverage,  and in such  circumstance,  Landlord's
policy will be excess over Tenant's policy. Tenant shall furnish certificates of
insurance and such other evidence satisfactory to Landlord of the maintenance of
all insurance  coverages  required hereunder prior to the Commencement Date, and
Tenant shall obtain a written  obligation on the part of each insurance  company
to notify  Landlord at least thirty (30) days before  cancellation or a material
change of any such insurance. All such insurance policies shall name Landlord as
additional insured or loss payee, as applicable, and otherwise shall be in form,
and  issued  by  companies,   reasonably   satisfactory  to  Landlord  and  with
deductibles  reasonably  satisfactory to Landlord.  Tenant's failure to maintain
any insurance hereunder shall constitute an Event of Default without any written
notice  required of Landlord and, in such event,  Landlord shall have the right,
but not the  obligation,  to purchase  any  insurance  that has  lapsed.  Should
Landlord  elect to purchase  insurance  on behalf of Tenant,  then Tenant  shall
reimburse to Landlord the cost of such  insurance and an  administrative  fee of
fifteen  percent (15%) of the amount of the premium  within ten (10) days of the
date of the notice from Landlord seeking the reimbursement. The policy limits of
any insurance  required to be carried by Tenant shall not limit the liability of
Tenant under this Lease.

         12.2  Landlord  shall not be liable  to  Tenant or those  claiming  by,
through,  or under Tenant for any injury to or death of any person or persons or
the damage to or theft,  destruction,  loss,  or loss of use of any  property or
inconvenience (a "Loss") caused by casualty,  theft, fire, third parties, or any
other matter  (including Losses arising through repair or alteration of any part
of the  Building,  or  failure  to make  repairs,  or  from  any  other  cause),
regardless  of whether the  negligence of any party caused such Loss in whole or
in part.  Landlord  and Tenant waive any claim each might have against the other
for any damage to or theft,  destruction,  loss, or loss of use of any property,
to the extent the same is covered  under any  insurance  policy  that covers the

<PAGE>

Building,  the Premises,  Landlord's or Tenant's  fixtures,  personal  property,
leasehold  improvements,  or business,  or, in the case of Tenant's  waiver,  is
required to be insured against under the terms of the Lease, regardless that the
negligence  or fault of the other party  caused such loss;  however,  the waiver
shall not apply to the  portion of any  damage  which is not  reimbursed  by the
damaged party's  insurance by reason of the deductible in such party's insurance
coverage, or apply to any coinsurance penalty which Landlord might sustain. Each
party  shall cause its  insurance  carrier to endorse  all  applicable  policies
waiving the carrier's rights of recovery under  subrogation or otherwise against
the other party.

         12.3 Subject to the  provisions of Section  12.2,  Tenant shall defend,
indemnify,  and hold  harmless  Landlord and its  employees  and agents from and
against all claims,  demands,  liabilities,  causes of action, suits, judgments,
and expenses (including attorneys' fees) for any Loss arising from an occurrence
on the Premises or caused by or resulting from the condition of the Premises, or
from the acts or omissions of Tenant or Tenant's employees,  agents, contractors
or invitees,  or from Tenant's  failure to perform any of its obligations  under
this Lease  (other  than a Loss  arising  from the gross  negligence  or willful
misconduct  of  Landlord or its  employees  or  agents),  even though  caused or
alleged to be caused by the joint,  comparative,  or  concurrent  negligence  or
fault of Landlord or its employees  and agents,  and even though any such claim,
cause of  action,  or suit is based  upon or alleged to be based upon the strict
liability of Landlord or its employees and agents,  provided that this indemnity
shall not apply to the gross negligence or willful misconduct of Landlord or its
employees or agents.  This indemnity provision is intended to indemnify Landlord
and its employees and agents against the consequences of their own negligence or
fault (but not the gross  negligence  or willful  misconduct  of Landlord or its
employees or agents) as provided above when Landlord or its employees and agents
are jointly, comparatively, or concurrently negligent with Tenant.

         12.4  Tenant  shall  not use,  and  shall  not  permit  any  subtenant,
licensee,  concessionaire,  employee, agent or invitee (hereinafter collectively
"Tenant's Representatives") to use, any portion of the Premises or Building, for
the  placement,  storage,  manufacture,  disposal or  handling of any  hazardous
materials  (hereinafter  defined)  unless Tenant  complies  with all  applicable
environmental  laws  (federal,  state or local),  including,  but not limited to
those  for  obtaining   proper   permits.   In  the  event  Tenant  or  Tenant's
Representatives  desire to use or place  hazardous  materials on the Premises it
shall notify  Landlord in writing thirty (30) days prior to such proposed use or
placement,  and  provide the names of the  hazardous  materials,  procedures  to
insure  compliance  with  the  applicable   environmental  law  and  such  other
information as Landlord may reasonably request.

         In the event  Tenant or Tenant's  Representatives  places,  releases or
discovers  any  hazardous  materials on the Premises or Building in violation of
applicable  environmental laws, Tenant shall immediately notify Landlord of such
fact in  writing  within  twenty-four  (24) hours of the  placement,  release or
discovery.  Tenant shall not attempt any removal,  abatement or  remediation  of
those   hazardous   materials  on  the  Premises  in  violation  of   applicable
environmental   laws,  without  obtaining  the  additional  written  consent  of
Landlord,  which consent may be specifically  conditioned on Landlord's right to
approve the scope, timing and techniques of any such work and the appointment of
all  contractors,  engineers,  inspectors and consultants in connection with any
such work.  Tenant shall be responsible  for the cost of any removal,  abatement
and remediation work of any hazardous  materials placed,  stored,  manufactured,
disposed of or handled by Tenant or Tenant's  Representatives on the Premises or
any other portion of the Building and for the cost of any removal,  abatement or
remediation of any hazardous materials which might be disturbed or released as a
result of any remodeling or  construction  in the Premises by Tenant or Tenant's
Representatives.  Such costs shall include, without limitation,  the cost of any
supervision by Landlord,  its employees or agents, in connection with such work.
Tenant  shall comply with all  environmental  laws in  connection  with any such
removal.

         Tenant shall indemnify Landlord, its shareholders, directors, officers,
employees and agents and hold them harmless,  from and against any loss,  damage
(including,  without limitation,  a loss in value of the Building or damages due
to restrictions on marketing  contaminated  space),  cost,  liability or expense
(including  reasonable attorneys' fees and expenses and court costs) arising out
of the  placement,  storage,  use,  manufacture,  disposal,  handling,  removal,
abatement  or  remediation  of any  hazardous  materials  by Tenant or  Tenant's
Representatives  on the  Premises or  Building,  or any  removal,  abatement  or
remediation  of any hazardous  materials  required  hereunder to be performed or
paid for by Tenant, with respect to any portion of the Premises or the Building,
or arising out of any breach by Tenant of its obligations under this paragraph.

         The  term  "hazardous  materials"  as used  herein  shall  mean (i) any
"hazardous  waste" as defined by the Resource  Conservation  and Recovery Act of
1976 (42  U.S.C.  Section  6901 et seq.),  as  amended  from  time to time,  and
regulations promulgated thereunder; (ii) any "hazardous substance" as defined by

<PAGE>

the Comprehensive Environmental Response, Compensation and Liability Act of 1980
(42 U.S.C. Section 9601, et seq.), as amended from time to time, and regulations
promulgated thereunder;  (iii) asbestos or polychlorinated  biphenyls;  (iv) any
substance the presence of which on the Building or on the Premises is prohibited
or regulated by any federal,  state or local law, regulation,  code or rule; and
(v) any other substance which requires  special  handling or notification of any
federal,  state  or  local  governmental  entity  in  its  collection,  storage,
treatment, or disposal.

         12.5 The  indemnification  provisions  contained  in  Article 12  shall
survive the termination of this Lease.


                                   ARTICLE 13
                                FIRE AND CASUALTY

         13.1 If the  Premises  or or  Building  or any  part  thereof  shall be
damaged by fire or other  casualty,  Tenant  shall give  prompt  written  notice
thereof to Landlord and  Landlord  may, at its option,  terminate  this Lease by
notifying Tenant in writing of such termination within sixty (60) days after the
date of such damage, in which event the rent hereunder shall be abated as of the
date of such  damage.  If  Landlord  does not  elect to  terminate  this  Lease,
Landlord  shall as soon as  reasonably  practical  after the date of such damage
commence to repair and restore the Building with  reasonable  diligence  (except
that  Landlord  shall not be  responsible  for delays  outside  its  control) to
substantially  the  same  condition  in which  it was  immediately  prior to the
happening  of the  casualty,  except  that  Landlord  shall not be  required  to
rebuild,  repair or replace any part of Tenant's leasehold  improvements (except
to the extent originally paid by Landlord),  furniture,  furnishings or fixtures
and equipment  removable by Tenant under the  provisions of this Lease,  and the
Lease  Term will be  extended  by the period of time equal to the time to repair
and  restore  the damage.  Tenant  agrees to rebuild  and restore any  leasehold
improvements  to the extent not required of Landlord.  Tenant shall commence any
such work upon written notice from Landlord.  Any insurance which may be carried
by Landlord or Tenant  against loss or damage to the Building or to the Premises
shall be for the sole benefit of the party carrying such insurance and under its
sole control.

         13.2 Landlord shall not be liable for any inconvenience or annoyance to
Tenant or injury to the business of Tenant resulting in any way from such damage
or the  repair  thereof.  Subject to the  provisions  of the  remainder  of this
paragragh, Landlord shall allow Tenant a fair diminution of rent during the time
and to the extent the Premises are unfit for  occupancy.  The diminution of rent
shall  expire on the date  Landlord  delivers  the  Premises to Tenant ready for
occupancy (if Landlord originally  provided the leasehold  improvements) or (ii)
on the date following an equivalent time allowed Tenant for the  construction of
leasehold improvements after Landlord delivered the Premises to Tenant ready for
Tenant to rebuild its leasehold improvements, as contemplated in Exhibit "E" (if
Tenant originally provided the leasehold  improvements).  If the Premises or any
other  portion of the  Building is damaged by fire or other  casualty  resulting
from the fault or negligence of Tenant or any of Tenant's  agents,  employees or
invitees,  the rent hereunder shall not be diminished  during the repair of such
damage and Tenant  shall be liable to  Landlord  for the cost and expense of the
repair and  restoration of the Building  caused thereby to the extent such costs
and expenses are not covered by insurance proceeds.

                                   ARTICLE 14
                                  CONDEMNATION

         14.1  If all of  the  Building  should  be  taken  for  any  public  or
quasi-public use under any governmental law, ordinance or regulation or by right
of eminent  domain or by private  purchase  in lieu  thereof,  this Lease  shall
terminate and the rent shall be abated during the unexpired portion of the Lease
Term,  effective  on the date  physical  possession  is taken by the  condemning
authority,  and Tenant shall have no claim against Landlord for the value of any
unexpired Lease Term.

         14.2 In the event a portion but not all of the Building  shall be taken
for any public or  quasi-public  use under any  governmental  law,  ordinance or
regulation,  or by right of eminent domain,  by private sale in lieu thereof and
the partial  taking or  condemnation  shall render the Building  unsuitable  for
continued  operation,   then  Landlord  shall  have  the  option,  in  its  sole
discretion,  of terminating  this Lease or, at Landlord's sole risk and expense,
restoring and  reconstructing  the Building to the extent necessary to make same
reasonably  tenantable.  Should Landlord not elect to terminate this Lease, then
Landlord  shall restore the Premises and the Lease shall  continue in full force
and effect  with the rent  payable  during the  unexpired  portion of this Lease
being  adjusted  to such an  extent  as may be fair  and  reasonable  under  the
circumstances,  and Tenant shall have no claim against Landlord for the value of
any interrupted portion of this Lease.

<PAGE>

         14.3  Landlord  shall be entitled  to receive  all of the  compensation
awarded upon a condemnation  (or the proceeds of a private sale in lieu thereof)
of all or any part of the Building or the Premises,  including any award for the
value of any unexpired  Lease Term,  and Tenant  hereby  assigns to Landlord and
expressly waives all claim to any such  compensation.  However,  Tenant reserves
for  itself  any  separate  award  made  for  relocation  cost or loss of any of
Tenant's trade  fixtures,  provided no such award shall diminish the amount that
would otherwise be awarded to Landlord.

                                   ARTICLE 15
                       SUBORDINATION, ATTORNMENT, ESTOPPEL

         15.1 This Lease shall be subordinate to any deed of trust, mortgage, or
other security instrument (a "Mortgage"),  or any ground lease, master lease, or
primary lease (a "Primary Lease"),  that now or hereafter covers all or any part
of the  Premises  (the  mortgagee  under any  Mortgage  or the lessor  under any
Primary Lease is referred to herein as  "Landlord's  Mortgagee"),  including any
modifications,  renewals  or  extensions  of such  Mortgage  or  Primary  Lease.
Notwithstanding the foregoing,  Tenant agrees that any such Landlord's Mortgagee
shall have the right at any time to  subordinate  such Mortgage or Primary Lease
to this  Lease on such  terms  and  subject  to such  conditions  as  Landlord's
Mortgagee may deem  appropriate in its discretion.  Tenant agrees upon demand to
execute such further  instruments  subordinating  this Lease or attorning to the
Landlord's  Mortgagee as Landlord may request.  In the event that Tenant  should
fail to execute any subordination or other agreement required by this paragraph,
promptly as requested,  Tenant hereby  irrevocably  constitutes  Landlord as its
attorney in fact to execute such  instrument in Tenant's name,  place and stead,
it being agreed that such power is one coupled with an interest.

         15.2 Tenant shall attorn to any party succeeding to Landlord's interest
in the Premises, whether by purchase,  foreclosure, deed in lieu of foreclosure,
power of sale,  termination of lease, or otherwise,  upon such party's  request,
and shall execute such  agreements  confirming such attornment as such party may
reasonably request.

         15.3  Tenant  shall not seek to enforce  any remedy it may have for any
default on the part of the  Landlord  without  first  giving  written  notice by
certified mail, return receipt  requested,  specifying the default in reasonable
detail, to any Landlord's  Mortgagee whose address has been given to Tenant, and
affording  such  Landlord's  Mortgagee  a  reasonable   opportunity  to  perform
Landlord's obligations hereunder.

         15.4 Tenant  agrees  that,  within ten (10) days of written  request by
Landlord,  it will execute and deliver to such persons as Landlord shall request
a statement in recordable  form  certifying that this Lease is unmodified and in
full force and effect (or if there have been modifications,  that the same is in
full force and effect as so modified), stating the dates to which rent and other
charges payable under this Lease have been paid, stating that Landlord is not in
default  hereunder  (or if Tenant  alleges a default  stating the nature of such
alleged  default)  and further  stating  such other  matters as  Landlord  shall
reasonably require.

                                   ARTICLE 16
                                EVENTS OF DEFAULT

         16.1 The following  shall be  deemed to  be Events of Default by Tenant
under this Lease:

         (a) Tenant  shall  fail to pay any  installment  of Base  Rental or any
other rent or monetary sum when due under the provisions of the Lease.

         (b) Tenant shall fail to comply with any term, provision or covenant of
this lease, other than the payment of a monetary sum, and such failure shall not
be cured within ten (10) days after written notice thereof to Tenant.

         (c) Tenant or any  guarantor of Tenant's  obligations  under this Lease
shall become insolvent, or shall make a transfer in fraud of creditors, or shall
make an assignment for the benefit of creditors.

<PAGE>


         (d) Tenant or any  guarantor of Tenant's  obligations  under this Lease
shall file a petition under any state or federal  bankruptcy or other insolvency
statutes or Tenant or any  guarantor  of Tenant's  obligations  under this Lease
shall be adjudged  bankrupt or insolvent in proceeding  filed against  Tenant or
guarantor  thereunder  and such  adjudication  shall not be vacated or set aside
within thirty (30) days.

         (e) A receiver or trustee shall be appointed  for all or  substantially
all of the assets of Tenant or any guarantor of the  obligations of Tenant under
this Lease and such receivership shall not be terminated or stayed within thirty
(30) days.

         (f) Tenant shall do or permit to be done anything  which creates a lien
upon the Premises or upon all or any part of the Building.

         (g) Tenant shall  desert or  vacate  any  substantial  portion  of  the
premises.

                                   ARTICLE 17
                                    REMEDIES

         17.1 Upon the  occurrence of an Event of Default,  Landlord  shall have
the  option to pursue  any one or more of the  following  remedies  without  any
notice or demand whatsoever, except if required by applicable law:

         (a)  Terminate  this  Lease in which  event  Tenant  shall  immediately
surrender the Premises to Landlord,  and if Tenant fails to do so, Landlord may,
without  prejudice  to any  other  remedy  which it may have for  possession  or
damages, enter upon and take possession and expel or remove Tenant and any other
person who may be  occupying  said  Premises or any part thereof  without  being
liable for prosecution or any claim for damages  therefor,  and Tenant agrees to
pay to Landlord,  as hereinafter set forth in Section 17.2, on demand the amount
of all loss and damage which Landlord may suffer by reason of such  termination,
whether  through  inability  to relet  the  Premises  on  satisfactory  terms or
otherwise.

         (b) Terminate Tenant's right to possession of the Premises, but not the
Lease,  in which  event  Tenant  shall  immediately  surrender  the  Premises to
Landlord,  and if Tenant fails to do so, Landlord may, without  prejudice to any
other remedy which it may have for  possession  or damages,  enter upon and take
possession  of the Premises and expel or remove  Tenant and any other person who
may be  occupying  the  Premises or any part  thereof  without  being liable for
prosecution  or any claim  for  damages  therefor  and  Tenant  agrees to pay to
Landlord,  as hereinafter set forth in Section 17.2, on demand the amount of all
loss and damage which Landlord may suffer by reason of such termination, whether
through inability to relet the Premises on satisfactory terms or otherwise.

         (c) Enter upon the Premises,  without terminating the Lease or Tenant's
right to possession  and without being liable for  prosecution  or any claim for
damages therefor, and do whatever Tenant is obligated to do under the provisions
of this  Lease,  and  Tenant  agrees to  reimburse  Landlord  on demand  for any
expenses  which Landlord may incur in thus  effecting  compliance  with Tenant's
obligations  under  this  Lease,  plus an  administrative  fee equal to  fifteen
percent (15%) of any expenses  incurred by Landlord,  and Tenant  further agrees
that  Landlord  shall not be liable for any damages  resulting to the Tenant for
such action.

         (d) Not to re-enter the Premises or terminate  the Lease,  but to allow
Tenant to remain in possession of the Premises, and bring suit against Tenant to
collect  the  monthly  rents and other  charges  provided  in this Lease as they
accrue.  Landlord shall have a right to allow such deficiencies of monthly rents
and other charges provided in this Lease to accumulate and to bring an action on
several or all of the accrued  deficiencies at one time. Any such suit shall not
prejudice  in any way the right of  Landlord  to bring a similar  action for any
subsequent deficiency or deficiencies.

         Tenant agrees that any re-entry into the Premises  under the provisions
of subpart (b) of this Section shall not be deemed a termination of the Lease or
an acceptance  of the surrender  thereof,  unless  Landlord  shall have notified
Tenant in writing  that it has so elected to  terminate  the Lease.  Tenant also
agrees that any notice  pursuant to an action for forcible  detainer or eviction
shall not be deemed to be a termination of the Lease unless  Landlord shall have
also  notified  Tenant in writing that it has so elected to terminate the Lease.
Any  election of the remedy  provided in subpart (b) of this  Section  shall not
preclude the subsequent  election by Landlord of the remedy under subpart (a) of
this Section.

<PAGE>


         Should  Landlord elect to re-enter the Premises under the provisions of
subparts  (a) or (b),  Landlord  shall  make  reasonable  efforts  to relet  the
Premises.  Nothing  herein,  however,  shall prohibit  Landlord from leasing any
other vacant space in the Building  before  leasing the Premises,  or from using
its  business  judgment in respect to the  releasing  of the  Premises.  In this
regard,  Landlord  shall not be required to relet the  Premises in part,  rather
than a whole,  or for a rental rate less than the rental rate then being offered
to prospective tenants for other space in the Building.

         17.2 Should Landlord at any time terminate this Lease or Tenant's right
to possession for an Event of Default,  Landlord shall recover from Tenant,  and
Tenant  shall be  liable  and pay to  Landlord,  as  damages  a sum equal to the
following:

          (i) the unpaid monthly rents and other charges  provided in this Lease
     and which accrued prior to the date of termination;

          (ii) an amount equal to the following:

         (A) Until Landlord is able,  through reasonable  efforts,  to relet the
Premises under terms  satisfactory to Landlord,  in its sole discretion,  Tenant
shall pay to Landlord  on or before the first day of each  calendar  month,  the
monthly  rentals and other  charges  provided  in this  Lease.  If and after the
Premises  have been  relet by  Landlord,  Tenant  shall pay to  Landlord  on the
twentieth  (20th) day of each calendar month the difference  between the monthly
rentals and other  charges  provided in this Lease for such  calendar  month and
that  actually  collected  by Landlord for such month.  If it is  necessary  for
Landlord to bring suit in order to collect any deficiency, Landlord shall have a
right to allow such deficiencies to accumulate and to bring an action on several
or all of the  accrued  deficiencies  at one  time.  Any  such  suit  shall  not
prejudice  in any way the right of  Landlord  to bring a similar  action for any
subsequent  deficiency or  deficiencies.  Any amount  collected by Landlord from
subsequent  tenants for any calendar month in excess of the monthly  rentals and
other charges  provided in this Lease,  shall be credited to Tenant,  first,  in
reduction  of Tenant's  liability  for any  calendar  month for which the amount
collected by Landlord  will be less than the monthly  rentals and other  charges
provided  in this Lease and,  then,  against  Tenant's  liability  for any other
damages of  Landlord  hereunder,  and  Tenant  shall have no right to any excess
other than the above-described credits; and

         (B) When Landlord desires,  Landlord may demand a final settlement,  in
which event,  Landlord  shall have a right to, and Tenant  hereby agrees to pay,
the difference between (1) the total monthly rents and other charges provided in
this Lease for the remainder of the Lease Term, and (2) the fair rental value of
the Premises for such period (determined as of the time of the final settlement)
such  difference  discounted to present value using the prime rate  published in
the Wall Street  Journal for the region in which the  Building is located on the
date of the final settlement; and

          (iii) all other damages which  Landlord may  demonstrate  it incurred,
     including,  without limitation, any and all costs of retaking the Premises,
     costs of maintaining  and preserving the Premises after such retaking,  and
     costs of  reletting  the  Premises,  such as costs to repair or remodel the
     Premises and to pay leasing commissions.

         If  Landlord  elects to  exercise  the  remedy  prescribed  in  Section
17.2(ii) (A) above,  this election shall not prejudice  Landlord's  right at any
time  thereafter  to cancel said  election in favor of the remedy  prescribed in
Section 17.2 (ii) (B) above.

         As used in Article  17,  the  phrase  "the  monthly  rentals  and other
charges  provided  in this Lease"  shall mean the monthly  amount of Base Rental
plus the monthly  amount of Tenant's Pro Rata Share of Excess  Basic  Costs.  If
Landlord  demands a final  settlement,  then  Landlord  shall  have the right to
estimate  Tenant's Pro Rata share of Excess Basic Costs for the remainder of the
Lease Term.

         Any past due  monthly  rents and other  charges  provided in this Lease
shall bear  interest at the Default  Interest  rate,  defined  elsewhere  in the
Lease.

         17.3 Upon the occurrence of an Event of Default, Landlord may alter all
locks and  security  devices at the Premises and will not be obligated to return
the key to Tenant if Landlord has elected  either to terminate  this Lease under
Section 17.1(a) or permanently  repossess the Premises under Section 17.1(b). If
Landlord  alters all locks and security  devices at the  Premises  because of an
Event of Default without  electing either to terminate this Lease or permanently

<PAGE>

repossess the Premises, then Landlord shall return the key to Tenant only during
the regular business hours of Landlord's  property manager and only in the event
Tenant has paid the rent or otherwise  performed  the  obligations  necessary to
cure the Event of Default and, further, Tenant provides reasonable assurances to
Landlord evidencing Tenant's ability to perform its remaining  obligations under
this Lease. In the event Landlord alters the locks and the keys are not returned
to Tenant,  then, upon the prior written  request of Tenant  accompanied by such
releases and waivers as Landlord may require,  Landlord,  at its option, may (i)
escort Tenant to the Premises to retrieve personal belongings and other property
not subject to Landlord's lien and security interest, or (ii) obtain from Tenant
a list of such personal  belongings and personal property and advise Tenant of a
time and place where such items will be made  available  to Tenant.  If Landlord
elects the latter  option,  then Tenant shall  reimburse to Landlord the cost of
moving  and/or  storing the items prior to Landlord's  making same  available to
Tenant.

         17.4 Should  Landlord  re-enter and take  possession  of the  Premises,
Landlord may,  with respect to any and all  furniture,  fixtures,  equipment and
other  personal  property  located on the Premises,  exercise one or more of the
following  rights:  (i) sell the personal property pursuant to any lien retained
by Landlord;  (ii) remove the personal  property from the Premises  (without the
necessity of obtaining a distress warrant,  writ of sequestration or other legal
process) and place same in storage and, in such event, Tenant shall be liable to
Landlord  for costs  incurred by Landlord in  connection  with such  removal and
storage and shall  indemnify and hold Landlord  harmless from all loss,  damage,
cost,  expense and  liability in  connection  with such removal and storage;  or
(iii) dispose of any of the personal property.  Should Landlord elect to dispose
of any of the personal property, whether or not such personal property was first
placed in storage,  Landlord  shall give Tenant  written notice at Tenant's last
known  address  advising  Tenant  that  Landlord  will  dispose of the  personal
property unless Tenant  retrieves same within five (5) days from the date of the
notice and pays to  Landlord  any costs  incurred  for storage  and/or  removal.
Landlord  shall  also  have the  right to  relinquish  possession  of all or any
portion of such  personal  property  to any person  claiming  to be  entitled to
possession thereof who presents to Landlord a copy of any instrument represented
to Landlord by such person to grant such person the right to take  possession of
such personal property, without the necessity on the part of Landlord to inquire
into the  authenticity  of the copy of the instrument or of Tenant's or Tenant's
predecessor's  signature  thereon and without the necessity of Landlord's making
any nature of  investigation  or inquiry as to the  validity  of the  factual or
legal  basis  upon which  such  person  purports  to act;  and Tenant  agrees to
indemnify and hold Landlord  harmless from all cost,  expense,  loss, damage and
liability  incident to  Landlord's  relinquishment  of  possession of all or any
portion of such furniture, fixtures, equipment of other personal property to the
person. The rights of Landlord herein stated shall be in addition to any and all
other rights which  Landlord has or may hereafter  have a law or in equity,  and
Tenant  stipulates  and  agrees  that the rights  herein  granted  Landlord  are
commercially  reasonable.  Tenant knowingly and irrevocably waives any claims it
may have  against  Landlord  arising  from  Landlord's  removal  and  storage of
Tenant's personal property in accordance with the provisions of this paragraph.

         17.5 No re-entry or taking possession of the Premises by Landlord shall
be  construed  as an election  on its part to  terminate  this  Lease,  unless a
written notice of such intention shall be given to Tenant.  Notwithstanding  any
such re-entry or taking  possession  of the  Premises,  Landlord may at any time
thereafter  elect to  terminate  this  Lease by reason of the Event of  Default.
Pursuit  of any of the  remedies  set forth in  Article  17 shall  not  preclude
pursuit of any of the other  remedies  in Article 17 or any others  provided  in
this Lease or any other  remedies  provided  by law or in equity.  The  specific
remedies to which  Landlord may resort under this Lease are  cumulative  and are
not  intended to be  exclusive  of any other  remedies to which  Landlord may be
lawfully  entitled  in case of a breach or  threatened  breach of the Lease.  In
addition to any other remedies provided in the Lease, Landlord shall be entitled
to seek injunctive  relief to restrain any violation or threatened  violation of
the  covenants,  conditions or  provisions  of this lease or to compel  specific
performance.  The  pursuit  of any  remedy  provided  in this  Lease  shall  not
constitute a forfeiture  or waiver of any rent due to Landlord  under this Lease
or of any damages  accruing to Landlord by reason of the violation of any of the
terms,  provisions and covenants contained in this Lease.  Landlord's acceptance
of rent  following  an Event of  Default  hereunder  shall not be  construed  as
Landlord's  waiver of such  Event of Default  unless  such  waiver is  expressly
stated in writing signed by Landlord.  No waiver by Landlord of any violation or
breach of the terms,  provisions,  and covenants of the Lease shall be deemed or
construed to constitute a waiver of any other  violation or breach of any of the
terms, provisions, and covenants of the Lease. No consent by Landlord to any act
of Tenant  under  this  Lease  shall be  deemed  to waive or render  unnecessary
consent to any subsequent or similar act. Forbearance by Landlord to enforce one
or more of the remedies  herein  provided  upon an Event of Default shall not be
deemed or  construed to  constitute a waiver of any other  violation or Event of
Default.

<PAGE>


         17.6  Landlord  and  Tenant  hereby  irrevocably  waive,  to the extent
permitted by law, any right to trial by jury in any lawsuit, action, proceeding,
or  counterclaim  brought by either party hereto against the other on any matter
arising out of or connected  with this Lease,  the acts or omissions of Landlord
or Tenant in connection  with this Lease,  or Tenant's  occupancy and use of the
Premises and the Building.

         17.7  Tenant  shall not for any  reason  withhold  or  reduce  Tenant's
required  payments of rent and other  charges  provided in this Lease,  it being
agreed that the  obligations  of Landlord  under this Lease are  independent  of
Tenant's  obligations  except  as  may  be  otherwise  expressly  provided.  The
immediately preceding sentence shall not be deemed to deny Tenant the pursuit of
all rights granted it under this Lease or at law;  however,  at the direction of
Landlord,  Tenant's  claims in this regard  shall be  litigated  in  proceedings
different from any litigation  involving rent claims or other claims by Landlord
against  Tenant  (i.e.,  each party may proceed to a separate  judgment  without
consideration,  counterclaim  or offset as to the claims  asserted  by the other
party).

         17.8 In the event of any default described in subsection (d) of Section
16.1 of this  Lease,  any  assumption  and  assignment  must  conform  with  the
requirements of the Bankruptcy  Code which provides,  in part, that the Landlord
must be provided with adequate assurance of the following: (i) that the proposed
assignee has sources to pay monthly  rents and any other  charges due under this
Lease;  (ii) that the  financial  condition  and  operating  performance  of any
proposed assignee and its guarantors,  if any, shall be similar to the financial
condition and operating performance of Tenant and its guarantors,  if any, as of
the date of execution of this Lease;  (iii) that any  percentage  rent due under
this  Lease  will  not  decline  substantially;  (iv)  that  any  assumption  or
assignment is subject to all of the provisions of this Lease (including, but not
limited  to,  restrictions  as to use) and will not  breach  any such  provision
contained in any other Lease, financing agreement or other agreement relating to
the Building;  and (v) that any  assumption  or assignment  will not disrupt any
tenant mix or balance in the Building.

         (a) In order to provide Landlord with the assurance contemplated by the
Bankruptcy Code, Tenant must fulfill the following  obligations,  in addition to
any  other  reasonable  obligations  that  Landlord  may  require,   before  any
assumption of this Lease is effective:  (i) all defaults under subsection (a) of
Section  16.1 of this Lease must be cured within ten (10) days after the date of
assumption;  (ii) all other defaults under Section 16.1 of this Lease other than
under  subsection  (d) of Section  16.1 must be cured within ten (10) days after
the date of assumption;  (iii) all actual  monetary  losses incurred by Landlord
(including,  but not limited  to,  reasonable  attorneys'  fees) must be paid to
Landlord  within ten (10) days after the date of  assumption;  and (iv) Landlord
must  receive  within  ten (10) days  after the date of  assumption  a  Security
Deposit in the amount of six (6) months  Base  Rental  (using the Base Rental in
effect for the first full month  immediately  following the  assumption)  and an
advance  prepayment of Base Rental in the amount of three (3) months Base Rental
(using the Base Rental in effect for the first full month immediately  following
the  assumption),  both sums to be held by Landlord in accordance with the other
provisions of this Lease, including, without limitation, Section 4.3, and deemed
to be rent under this Lease for the purposes of the  Bankruptcy  Code as amended
and from time to time in effect.

         (b) In  the  event  this  Lease  is  assumed  in  accordance  with  the
requirements  of the  Bankruptcy  Code  and  this  Lease,  and  is  subsequently
assigned,  then, in addition to any other  reasonable  obligations that Landlord
may require and in order to provide Landlord with the assurances contemplated by
the  Bankruptcy  Code,  Landlord  shall be provided  with the  following:  (i) a
financial  statement  of the  proposed  assignee  prepared  in  accordance  with
generally accepted accounting principles  consistently applied, though on a cash
basis,  which  reveals  a net  worth  in an  amount  sufficient,  in  Landlord's
reasonable  judgment,  to assure the future performance by the proposed assignee
of Tenant's  obligations  under this Lease; or (ii) a written guaranty by one or
more  guarantors  with  financial  ability   sufficient  to  assure  the  future
performance  of Tenant's  obligations  under this lease,  such guaranty to be in
form and content satisfactory to Landlord and to cover the performance of all of
Tenant's obligations under this Lease.

<PAGE>


                                   ARTICLE 18
                               LANDLORD'S DEFAULT

         18.1  Landlord  shall be in default under the Lease if Landlord has not
begun and pursued with reasonable  diligence the cure of any failure of Landlord
to meet its  obligations  under the Lease within thirty (30) days of the receipt
by  Landlord of written  notice  from Tenant of the alleged  failure to perform.
Tenant hereby waives any right to terminate or rescind this Lease as a result of
Landlord's default as to any covenant or agreement contained in this Lease or as
a result of the breach of any  promise  or  inducement  hereof,  whether in this
Lease or elsewhere  and Tenant  hereby  agrees that  Tenant's  sole remedies for
default  hereunder and for breach of any promise or inducement  shall be limited
to a suit for damages  and/or  injunctive  relief.  In addition,  Tenant  hereby
covenants  that,  prior to the exercise of any such  remedies,  it will give the
mortgagees holding mortgages on the project notice and a reasonable time to cure
any default by Landlord.

         18.2 The  liability  of  Landlord to Tenant for any default by Landlord
under the terms of this Lease shall be limited to Tenant's  actual  direct,  but
not consequential,  damages therefor. Tenant agrees to look solely to the estate
and interest of Landlord in the Building for the  collection  of any judgment or
other judicial  process  requiring the payment of money by Landlord in the event
of a default or breach by  Landlord  with  respect to this  Lease,  and no other
assets of Landlord shall be subject to levy of execution or other procedures for
the satisfaction of Tenant's rights.   This section shall not be deemed to limit
or deny any  remedies  which Tenant may have in the event of default by Landlord
hereunder which do not involve the personal liability of Landlord.

                                   ARTICLE 19
                           LANDLORD'S CONTRACTUAL LIEN

         19.1 Landlord shall have, at all times,  a valid  security  interest in
and upon the  present  and future  receivables  of Tenant and all goods,  wares,
equipment,  fixtures,  furniture,  improvements  and other personal  property of
Tenant  presently or which may  hereafter be situated on the  Premises,  and all
proceeds therefrom, and such property shall not be removed therefrom without the
consent of  Landlord  until all  arrearage  in rent as well as any and all other
sums of money  then due to  Landlord  hereunder  shall  first have been paid and
discharged  and all the covenants,  agreements  and conditions  hereof have been
fully  complied  with and  performed  by  Tenant.  This  contractual  lien is in
addition  to any and all liens in favor of  Landlord  and  arising  under law or
otherwise  and is given to secure  payment  of all rent and other  sums of money
becoming due under the Lease from Tenant and to secure payment of any damages or
loss  which  Landlord  may  suffer  by  reason  of the  breach  by Tenant of any
covenant,  agreement  or  condition  contained  herein  and  shall  survive  any
termination of this Lease by reason of a default by Tenant.  Upon the occurrence
of any Event of  Default by  Tenant,  Landlord  may,  in  addition  to any other
remedies provided herein, enter upon the Premises and take possession of any and
all  goods,  wares,  equipment,  fixtures,  furniture,  improvements  and  other
personal  property of Tenant  situated on the  Premises,  without  liability for
trespass or conversion,  store same (on or off the Premises or Project) and sell
the same at public or private sale,  with or without having such property at the
sale, after giving Tenant  reasonable notice of the time and place of any public
sale or of the time after  which any private  sale is to be made,  at which sale
the Landlord or its assigns may purchase  unless  otherwise  prohibited  by law.
Without  intending  to  exclude  any other  manner of giving  Tenant  reasonable
notice,  the  requirement  of  reasonable  notice shall be met if such notice is
given in the manner  prescribed  in this Lease at least five (5) days before the
time of sale  unless  otherwise  required  by law.  The  proceeds  from any such
disposition,  less any and all expenses connected with the taking of possession,
holding and selling of the property  (including  reasonable  attorneys' fees and
other expenses),  shall be applied as a credit against the indebtedness  secured
by the security  interest granted in this section.  Any surplus shall be paid to
Tenant  or  as  otherwise  required  by  law;  and  the  Tenant  shall  pay  any
deficiencies forthwith.  Upon request by Landlord,  Tenant agrees to execute and
deliver to Landlord  within ten (10) days of such request a financing  statement
in  form  sufficient  to  perfect  the  security  interest  of  Landlord  in the
aforementioned property and proceeds thereof under the provisions of the Uniform
Commercial Code in force in the State of Texas. Landlord may also file a copy of
this Lease to perfect its interest in the personal  property of Tenant described
above.

<PAGE>

                                   ARTICLE 20
                       SURRENDER OF PREMISES; HOLDING OVER

         20.1 No act by Landlord shall be deemed an acceptance of a surrender of
the  Premises,  and no agreement to accept a surrender of the Premises  shall be
valid  unless  the  same is made in  writing  and  signed  by  Landlord.  At the
expiration or  termination  of this Lease,  Tenant shall deliver to Landlord the
Premises  "broom-clean" and with all improvements located thereon in good repair
and  condition,  reasonable  wear and tear  and  condemnation  and fire or other
casualty damage not caused by Tenant excepted, and shall deliver to Landlord all
keys to the Premises.  Provided that Tenant has performed all of its obligations
hereunder,  Tenant may remove all  unattached  trade  fixtures,  furniture,  and
personal  property placed in the Premises by Tenant (but Tenant shall not remove
any  such  item  which  was  paid  for,  in  whole  or in  part,  by  Landlord).
Additionally,  Tenant shall remove such  alterations,  additions,  improvements,
trade fixtures, equipment, wiring, and furniture as Landlord may request. Tenant
shall repair all damage caused by such  removal.  All items not so removed shall
be deemed to have  been  abandoned  by  Tenant  and may be  appropriated,  sold,
stored, destroyed, or otherwise disposed of by Landlord at any time, thereafter,
without  notice to Tenant and without any  obligation to account for such items.
If Landlord incurs any cost in the storage or removal of any such items,  Tenant
shall pay to Landlord on demand any and all such charges. The provisions of this
paragraph shall survive the expiration or termination of the Lease.

         20.2 If Tenant, or any party under Tenant claiming rights to the Lease,
fails to vacate the Premises at the end of the Lease Term,  then such possession
shall be an unlawful detainer (Landlord  reserving the right to seek an eviction
or removal),  no tenancy shall be created,  and Tenant shall pay each day during
any  holdover  period  a daily  Base  Rental  equal  to the  greater  of (a) one
thirtieth  (1/30th)  of one hundred  fifty  percent  (150%) of the monthly  Base
Rental  payable  during the last month of the Lease Term, or (b) the  prevailing
rental  rate for  similar  space in the  Building,  plus,  Tenant  shall pay any
additional  rental due under the other  provisions of this Lease during any such
holdover  period.  In addition to payment of rent,  Tenant shall pay to Landlord
all other  damages to which  Landlord  may be  entitled  as a result of Tenant's
holding over.

                                   ARTICLE 21
                                 RIGHT OF ACCESS

         21.1  Landlord or  Landlord's  representatives  shall have the right to
enter into and upon the Premises at any and all reasonable times (i) to inspect,
clean or make  repairs or  alterations  or additions to the Premises as Landlord
may deem  necessary  (but without any  obligation  to do so, except as expressly
provided  elsewhere in the Lease),  or (ii) to show the Premises to  prospective
tenants,  purchasers  or  lenders;  and  Tenant  shall  not be  entitled  to any
abatement or reduction  of rent by reason  thereof,  nor shall any such entry be
deemed to be an actual or constructive eviction.

                                   ARTICLE 22
                               SUBSTITUTION SPACE

         22.1 From time to time during the Term, Landlord may substitute for the
Premises other space that has an area at least equal to that of the Premises and
is  located  in the  Building  or in any other  comparable  building  managed by
Landlord or an affiliate of Landlord (the "Substitution Space").

         22.2 If Landlord  exercises  such right by giving Tenant notice thereof
("Substitution  Notice") at least sixty (60) days before the  effective  date of
such substitution, then (i) the description of the Premises shall be replaced by
the  description  of the  Substitution  Space;  and  (ii) all of the  terms  and
conditions of this Lease shall apply to the  Substitution  Space except that (A)
if the then unexpired balance of the Lease Term shall be less than one (1) year,
then the Lease Term shall be  extended so that it shall be one (1) year from the
Substitution  Commencement  Date (defined  below),  and (B) if the  Substitution
Space contains more square footage than the Premises,  then the Base Rental then
in effect shall be increased  proportionately (provided that such increase shall
not exceed 105% of the Base Rental due for the Premises) and shall be subject to
adjustment as herein  provided.  The effective  date of such  substitution  (the
"Substitution   Commencement   Date")  shall  be  the  date   specified  in  the
Substitution Notice or, if Landlord is required to perform tenant finish work to
the  Substitution  Space  under this  Article,  then the date on which  Landlord
substantially  completes  such  tenant  finish  work.  If Landlord is delayed in
performing the tenant finish work by Tenant's actions (either by Tenant's change
in  the  plans  and  specifications  for  such  work  or  otherwise),  then  the
Substitution  Commencement  Date shall not be extended and Tenant shall pay rent
for the  Substitution  Space beginning on the date specified in the Substitution
Notice.

<PAGE>


         22.3 Tenant may either accept  possession of the Substitution  Space in
its  "as is"  condition  as of the  Substitution  Commencement  Date or  require
Landlord to alter the Substitution Space in the same manner as the Premises were
altered or were to be altered.  Tenant shall deliver to Landlord  written notice
of its  election  within  ten (10) days after the  Substitution  Notice has been
delivered to Tenant. If Tenant fails to timely deliver notice of its election or
if an Event of Default then exists,  then Tenant shall be deemed to have elected
to accept  possession of the  Substitution  Space in its "as is"  condition.  If
Tenant timely elects to require Landlord to alter the Substitution  Space,  then
(i)  notwithstanding  Section 22.2, if the then unexpired balance of the Term is
less than three (3) years,  then the Term shall be extended so that it continues
for three (3) years from the  Substitution  Commencement  Date,  and (ii) Tenant
shall  continue  to occupy the  Premises  (upon all of the terms of this  Lease)
until the Substitution Commencement Date.

         22.4 Tenant shall move from the Premises  into the  Substitution  Space
and shall  surrender  possession  of the Premises as provided in Section 20.1 by
the  Substitution  Commencement  Date. If Tenant occupies the Premises after the
Substitution Commencement Date, then Tenant's occupancy of the Premises shall be
a tenancy-at-will (and, without limiting all other rights and remedies available
to Landlord,  including  instituting a forcible detainer suit), Tenant shall pay
Base Rental for the  Premises as provided in Section 20.2 and all other rent due
therefor  until such  occupancy  ends;  such amounts shall be in addition to the
rent due for the Substitution Space.

         22.5 If Landlord exercises its substitution  right, then Landlord shall
reimburse  Tenant for  Tenant's  reasonable  out-of-pocket  expenses  for moving
Tenant's  furniture,  equipment,  supplies  and  telephone  equipment  from  the
Premises to the Substitution Space and for reprinting Tenant's stationery of the
same  quality and  quantity of Tenant's  stationery  supply on hand  immediately
prior to Landlord's  notice to Tenant of the exercise of this relocation  right.
If the Substitution Space contains more square footage than the Premises, and if
the Premises were  carpeted,  Landlord shall supply and install and equal amount
of carpeting of the same or equivalent quality and color.

                                   ARTICLE 23
                                  MISCELLANEOUS

         23.1 Attorneys'  Fees. In case it should be necessary or proper for one
party to bring an action  under  this Lease  against  the other , then the party
which  does not  prevail  agrees  in each and any such  case to pay to the party
which  prevails  its  reasonable  attorneys'  fees.  Furthermore,  should  it be
necessary  for  Landlord to consult an attorney  for the  enforcement  of any of
Landlord's rights hereunder  (including seeking payment of any amounts due under
the  Lease)   without  the  necessity  of  bringing  an  action,   then  Tenant,
nonetheless,  agrees in such event to pay to Landlord its reasonable  attorneys'
fees.

         23.2  Taxes.  Tenant  shall be liable for all taxes  levied or assessed
against  personal  property,  furniture,  or  fixtures  placed  by Tenant in the
Premises. If any taxes for which Tenant is liable are levied or assessed against
Landlord or Landlord's  property and Landlord  elects to pay the same, or if the
assessed value of Landlord's property is increased by inclusion of such personal
property,  furniture or fixtures  and Landlord  elects to pay the taxes based on
such increase, then Tenant shall pay to Landlord, upon demand, that part of such
taxes for which Tenant is primarily liable hereunder.

         23.3 Name.  Tenant shall not,  without the written consent of Landlord,
use the name of the  Building  for any purpose  other than as the address of the
business to be  conducted  by Tenant in the  Premises.  In no event shall Tenant
acquire any rights in or to such name and Landlord  reserves the right from time
to time and at any time to change the name of the Building.

         23.4 Financial Statements. Prior to the execution of this Lease, Tenant
has delivered financial  statements to Landlord,  prepared by a certified public
accountant and certified to be true and correct in all material aspects.  Tenant
further agrees to deliver to Landlord updated financial  statements from time to
time  within  ten  (10)  days of  Landlord's  written  request,  each  financial
statement  certified  to be true  and  correct  in all  material  aspects  by an
authorized person on behalf of Tenant.

         23.5  Brokerage.  Landlord and Tenant each warrant to the other that it
has not dealt with any broker or agent in  connection  with the  negotiation  or
execution  of  this  Lease,  other  than  the  person(s)  listed  in  the  Basic
Definitions and Lease Provisions of this Lease (the "Broker(s)"). Except for any
Broker(s)  who shall be  compensated  in  accordance  with the  provisions  of a
separate  agreement,  Landlord  and  Tenant  each agree to  indemnify  the other
against  all  costs,   expenses,   attorneys'  fees,  and  other  liability  for
commissions or other compensation  claimed by any other broker or agent claiming
the same by, through, or under the indemnifying party.

<PAGE>


         23.6 Quiet  Enjoyment.  Provided  Tenant has performed all of the terms
and conditions of this Lease to be performed by Tenant,  Tenant shall  peaceably
and quietly  hold and enjoy the Premises for the Term,  without  hindrance  from
Landlord or any party claiming by, through,  or under  Landlord,  subject to the
terms and conditions of this Lease.

         23.7 Force Majeure.  Whenever a period of time is herein prescribed for
action to be taken by either  party  hereto,  such party  shall not be liable or
responsible  for, and there shall be excluded from the  computation for any such
period of time, delays due to strikes, riots, acts of God, shortages of labor or
materials,  war, governmental laws, regulations,  or restrictions,  or any other
causes of any kind  whatsoever  which are beyond the control of such party.  The
foregoing shall not excuse,  however, the timely payment of rent by Tenant under
the provisions of this Lease.

         23.8 Notices.  All notices and other  communications given by one party
to the other under the  provisions of this Lease shall be in writing,  addressed
to the  party  at the  address  provided  in the  Basic  Definitions  and  Lease
Provisions,  and shall be by one of the  following:  (i) mailed by first  class,
United States Mail, postage prepaid,  certified,  with return receipt requested,
(ii) hand delivered by courier to the intended address, or (iii) sent by prepaid
telegram,  cable,  facsimile  transmission,  or telex followed by a confirmatory
letter.  Notice sent by certified  mail shall be effective  three (3) days after
being  deposited in the United States Mail; all other notices shall be effective
upon  delivery to the address of the  addressee.  The parties  hereto may change
their  addresses by giving notice  thereof to the other in conformity  with this
provision.

         23.9 Joint and  Several  Liability.  If there is more than one  Tenant,
then the obligations  hereunder  imposed upon Tenant shall be joint and several.
If there is a guarantor of Tenant's obligations hereunder,  then the obligations
hereunder  imposed  upon Tenant  shall be the joint and several  obligations  of
Tenant and such  guarantor,  and Landlord need not first proceed  against Tenant
before  proceeding  against  such  guarantor  nor  shall any such  guarantor  be
released from its guaranty for any reason whatsoever.

         23.10  Severability.  If any  clause  or  provision  of this  Lease  is
illegal,  invalid,  or  unenforceable  under  present or future  laws,  then the
remainder of this Lease shall not be affected thereby and in lieu of such clause
or provision, there shall be added as a part of this Lease a clause of provision
as  similar  in terms to such  illegal,  invalid,  or  unenforceable  clause  or
provision as may be possible and be legal, valid, and enforceable.

         23.11 Amendments;  Construction and Binding Effect.  This Lease may not
be amended  except by  instrument in writing  signed by Landlord and Tenant.  No
provision  of this Lease shall be deemed to have been waived by Landlord  unless
such waiver is in writing  signed by Landlord,  and no custom or practice  which
may evolve between the parties in the  administration of the terms thereof shall
waive or diminish the right of Landlord to insist upon the performance by Tenant
in strict accordance with the terms hereof.  The terms and conditions  contained
in this Lease  shall  inure to the  benefit of and be binding  upon the  parties
hereto,   and  upon  their   respective   successors   in  interest   and  legal
representatives,  except as otherwise herein expressly  provided.  This Lease is
for the sole  benefit  of  Landlord  and  Tenant,  and,  other  than  Landlord's
Mortgagee or a successor  thereto,  no third party shall be deemed a beneficiary
hereof.

         23.12  Captions.   The  captions   contained  in  this  Lease  are  for
convenience  of  reference  only,  and do not  limit or  enlarge  the  terms and
conditions of this Lease.

         23.13  Recording.  Tenant  shall not record or permit to be recorded in
the  official  records of the county where the Premises are located the Lease or
any memorandum of lease or other document  giving notice of the existence of the
Lease.

         23.14  Time of Essence.  Except as otherwise expressly provided in this
Lease, time is of the essence.

         23.15 Governing Law; Venue. The laws of the state in which the Building
is  located  shall  govern  the   interpretation,   validity,   performance  and
enforcement  of this Lease.  Venue for any action  under this Lease shall be the
county in which rentals are due.

<PAGE>


         23.16 Authority. If Tenant is a corporation or partnership,  the person
executing the Lease on behalf of Tenant hereby  represents and warrants that (i)
he is duly  authorized  and  empowered to execute the Lease on behalf of Tenant,
(ii) Tenant has full right and  authority  to enter into this  Lease,  and (iii)
upon full execution,  this Lease  constitutes a valid and binding  obligation of
Tenant.

         23.17 Approval.  Any approval of Landlord required under the provisions
of this Lease must be in writing or it shall not be deemed to be effective  and,
if not in  writing,  then in the  making  of proof  thereof,  Landlord  shall be
presumed not to have given its approval.

         23.18 No  Merger.  There  shall be no  merger of the  leasehold  estate
hereby  created  with the fee estate in the  Premises or any part thereof if the
same  person  acquires  or holds,  directly  or  indirectly,  this  Lease or any
interest  in this Lease and the fee estate in the  Premises  or any  interest in
such fee estate.

         23.19  No  Partnership.  Nothing  in this  Lease  shall  be  deemed  or
construed  by the  parties  hereto,  nor by any third  party,  as  creating  the
relationship  of  principal  and  agent or of  partnership  or of joint  venture
between the parties  hereto,  it being  understood  and agreed that  neither the
method of computation of rent, nor any other provision contained herein, nor any
acts of the parties hereto,  shall be deemed to create any relationship  between
the parties hereto other than the relationship of landlord and tenant.

         23.20 No Offer.  The submission of this Lease by Landlord to Tenant for
examination  shall not be construed as an offer to lease or a reservation  of an
option to lease. Further, it is the intention of the parties that Landlord shall
not be bound and Tenant  shall not have any rights  under this Lease  unless and
until Landlord executes a copy of this Lease and delivers it to Tenant.

         23.21 Exhibits.  All  exhibits  and  attachments  attached  hereto  are
incorporated herein by this reference.

                  Exhibit A -       Legal Description
                  Exhibit B -       Outline of Premises
                  Exhibit C -       Operating Expense Reimbursement
                  Exhibit D -       Building Rules and Regulations
                  Exhibit E -       Work Letter
                  Exhibit F -       Commencement Date Letter
                  Exhibit M -       Special Conditions

         23.22 Entire  Agreement.  This Lease,  including all exhibits  attached
hereto,  constitutes the entire agreement  between Landlord and Tenant regarding
the subject matter hereof and supersedes all oral  statements and prior writings
relating thereto.  Except for those set forth in this Lease, no representations,
warranties,  or  agreements  have been  made by  Landlord,  Landlord's  agent or
Tenant,  anyone of the  foregoing to the other with respect to this Lease or the
obligations to Landlord or Tenant in connection therewith.

<PAGE>


EXECUTED to be effective on the day and date first written above.

                                            LANDLORD:

                                            AETNA LIFE INSURANCE COMPANY

                                            By: Allegis Realty Investors LLC,

                                            Its Investment Advisor and Agent

                                            By:
                                                -----------------------------
                                            Printed Name: James G. Hughes
                                            Title:  Vice President
ATTEST:                                     TENANT:

                                            PHYMED, INC., a Texas Corporation

                                            By:
- ---------------------------                     -----------------------------
            (Title)                             Printed Name: George Barker
                                                Title:  President


<PAGE>


                                   EXHIBIT "A"
                                LEGAL DESCRIPTION
                            COMMERCE PLAZA HILLCREST

BEING block A/7467,  Hillcrest 635 Addition,  an Addition to the City of Dallas,
Dallas County, Texas, as recorded in Volume 71021, Page 2073-2080,  Map Records,
Dallas County,  Texas,  and being out of the HIRAM WILBURN SURVEY,  Abstract No.
1568:

BEGINNING  at a point  for a corner in the East  right of way line of  Hillcrest
Road with its  intersection  with the Southerly  right of way line of Interstate
Highway 635;

THENCE  South  82  degrees  15' 12"  East,  along  the  said  Southerly  Line of
Interstate Highway 635, 1136.34 feet to a point to a corner;

THENCE  South 17 degrees 29' 31" East along the  encroachment  limit line on the
West side of White Rock Creek,  340.62 feet to a point for a corner in the South
Line of City of Dallas  Block No.  7467 and in the North  Line of City of Dallas
Block 7466;

THENCE  North 89  degrees  00' 00" West,  along the North Line of City of Dallas
Block No.  7466,1249.71  feet to a point  for a corner in the East  right of way
line of Hillcrest Road, said right of way being 60.00 feet in width;

THENCE North 00 degrees 09' 18" East,  along said East Line of  Hillcrest  Road,
378.08 feet to a point for a corner;

THENCE  South 89  degrees  57' 07"  East,  continuing  along  the  East  Line of
Hillcrest Road, 20.00 feet to a point for a corner;

THENCE  North 00  degrees  06' 33"  East,  continuing  along  the  East  Line of
Hillcrest  Road 78.18 feet to the POINT OF BEGINNING and  containing  463,313.34
square feet or 10.636 acres of land, more or less.

And now known as Block A/7467,  Hillcrest 635 Addition,  an Addition to the City
of Dallas,  Texas,  according to the map thereof recorded in Volume 71021,  Page
2073, Map Records of Dallas County, Texas


<PAGE>


                                   Exhibit "B"



















<PAGE>


                                   EXHIBIT "C"

                         OPERATING EXPENSE REIMBURSEMENT

         This Exhibit is attached to and made a part of the Lease by and between
AETNA LIFE INSURANCE COMPANY  ("Landlord") and PHYMED, INC., a Texas Corporation
("Tenant").

         A. Tenant shall pay Tenant's  Pro-Rata Share of the  excess  ("Excess")
of actual  Basic Costs for a calendar  year over the actual  Basic Costs for the
calendar  year of 1999 , (the  "Expense  Stop").  Landlord may make a good faith
estimate of the Excess for any calendar  year or part  thereof  during the Lease
Term,  and,  Tenant  shall pay to  Landlord as  additional  rent along with each
monthly payment of Base Rental an amount equal to the estimated  Excess for such
calendar  year or part thereof  divided by the number of months in such calendar
year during the Lease Term. From time to time during any calendar year, Landlord
may revise its estimate of the Excess and deliver a copy of the revised estimate
to Tenant.  Thereafter,  the monthly  installments  of Excess  payable by Tenant
shall be appropriately  adjusted. In no event will the provisions of Exhibit "C"
serve to reduce the monthly Base Rental.

         B.  Landlord  will  maintain  books and  records of all Basic  Costs in
accordance with generally  accepted  accounting for similar types of properties,
applied on a consistent  basis.  After the end of every  calendar  year Landlord
will deliver to Tenant a statement  ("Annual Cost Statement")  setting forth the
actual Basic Costs for the prior  calendar year, the actual amount of any Excess
for the prior  calendar  year,  and Tenant's  Pro Rata Share.  If Tenant owes an
additional  amount of Excess over the  estimated  payments made during the prior
calendar  year,  this will also be noted in the Annual Cost Statement and Tenant
will pay such amount,  as additional rent, with the next due installment of Base
Rental.  If the Annual  Statement  reflects an  overpayment,  then Landlord will
credit  the  amount of the  overpayment  against  the next due  installments  of
additional  rent  payable  under the  provisions  of this Exhibit "C", or if the
Lease Term has expired, Landlord will refund the difference to Tenant.

         Notwithstanding  any  expiration or earlier  termination of this Lease,
Tenant's  obligation  to pay Tenant's Pro Rata Share of any Excess shall survive
any expiration or termination of this Lease.

         C. The term "Basic Costs" shall mean all expenses and  disbursements of
every kind (subject to the limitations  set forth below) which Landlord  incurs,
pays or becomes  obligated to pay in connection  with the ownership,  operation,
management,  repair  and  maintenance  (including  replacement  thereof)  of the
Project, including, but not limited to, the following:

               (a) Wages and salaries of all employees engaged in the operation,
repair, replacement,  and maintenance of the Project, including taxes, insurance
and benefits relating thereto;

               (b)  All  supplies   and   materials   used  in  the   operation,
maintenance, repair, replacement, and security of the Project;

               (c) Annual cost of all capital  improvements  made to the Project
which although capital in nature can reasonably be expected to reduce the normal
operating  costs of the  Project,  as well as all capital  improvements  made to
comply with any legal requirements, insurance requirements or environmental laws
which become  effective  after the date of this Lease, or to benefit or increase
the safety and security of the Project,  as amortized  over the useful  economic
life of such improvements as determined by Landlord in its reasonable discretion
(without regard to the period over which such improvements may be depreciated or
amortized for federal income tax purposes), and the amortized portion,  together
with interest on the unamortized portion of such improvements or expenditures at
an interest  rate equal to two percent  (2%) over the  interest  rate payable on
United States Treasury  securities having a maturity comparable to the period of
the  amortization at the time Landlord  incurred the cost,  shall be included in
operating  expenses  in the year in which  the  costs  are  incurred  and in any
subsequent years;

               (d) Cost of all  utilities,  other  than  the  cost of  utilities
actually reimbursed to Landlord by individual tenants ;

               (e) Cost of any insurance or insurance related expense applicable
to the Project and Landlord's  personal  property used in connection  therewith,
including without limitation,  the premiums for public liability coverage,  fire
and extended coverage, and rental loss coverage;

<PAGE>


               (f) All taxes and  assessments and  governmental  charges whether
federal, state, county or municipal,  and whether they be by taxing districts or
authorities  presently taxing or by others,  subsequently  created or otherwise,
and  any  other  taxes  and  assessments  attributable  to the  Project  (or its
operation),  and the grounds,  parking areas,  driveways,  and alleys around the
Project,  excluding,  however,  federal and state taxes on income (collectively,
"Taxes"); if the present method of taxation changes so that in lieu of the whole
or any part of any Taxes levied on the  Landlord or Project,  there is levied on
Landlord a capital tax directly on the rents  received  therefrom or a franchise
tax,  assessment,  or charge based, in whole or in part, upon such rents for the
Project,  then all such taxes,  assessments,  or charges, or the part thereof so
based,  shall be deemed to be included  within the term "Taxes" for the purposes
hereof;

               (g) Cost of repairs, replacements, and general maintenance of the
Project; and

               (h) Cost of service or  maintenance  contracts  with  independent
contractors for the operation,  maintenance, repair, replacement, or security of
the Project (including,  without limitation, alarm service, window cleaning, and
elevator  maintenance)  (Nothing  herein is  intended  to  obligate  Landlord to
provide any security for the Project.).

There are  specifically  excluded  from the  definition of the term "Basic Cost"
costs for the following:

               (1) Capital improvements made to the Project,  other than capital
improvements  described  above in this  Exhibit "C" and except for items  which,
though capital for accounting purposes,  are properly considered maintenance and
repair  items,  such as  painting  of  common  areas,  replacement  of carpet in
elevator lobbies, and the like;

               (2) Repair, replacements and general maintenance paid by proceeds
of insurance or by Tenant or other third parties,  and alterations  attributable
solely to tenants of the Project other than Tenant;

               (3) Debt service on loans to Landlord;

               (4) Depreciation of the Project;

               (5) Leasing commissions;

               (6) Legal  expenses,  other than those  incurred  for the general
benefit of the Building's tenants (e.g., tax disputes);

               (7) Wages and salaries and benefits of employees  above the level
of Project manager;

               (8) renovating or otherwise  installing  tenant  improvements for
occupants of the Project; and

               (9) correcting defects in the construction of the Project.

         D. With respect to any calendar year or partial  calendar year in which
the Project is not occupied to the extent of 100% of the rentable  area thereof,
the Basic Costs for such period shall, for the purposes hereof,  be increased to
the amount which would have been  incurred had the Project been  occupied to the
extent of 100% of the rentable area.


<PAGE>


                                   EXHIBIT "D"
                              RULES AND REGULATIONS

         This Exhibit is attached to and made a part of the Lease by and between
AETNA LIFE INSURANCE COMPANY  ("Landlord") and PHYMED,  INC, a Texas Corporation
("Tenant").

         A. The  following  rules  and  regulations shall apply to the Building,
including, without limitation the Premises:

         1. Sidewalks, doorways, vestibules, halls, stairways, and other similar
areas shall not be obstructed by Tenant or used by any Tenant for purposes other
than ingress and egress to and from its Premises. No rubbish,  litter, trash, or
material of any nature shall be placed, emptied, or thrown in those areas. At no
time  shall  Tenant  permit  Tenant's  employees  to loiter  in common  areas or
elsewhere in or about the Building.

         2.  Plumbing,  fixtures  and  appliances  shall  be used  only  for the
purposes for which designed, and no sweepings, rubbish, rags or other unsuitable
material  shall be thrown or  deposited  therein.  Damage  resulting to any such
fixtures  or  appliances  from  misuse  by Tenant or its  agents,  employees  or
invitees, shall be paid by such Tenant.

         3. No signs,  advertisements  or notices shall be painted or affixed on
or to any  windows  or doors or other  part of the  Building  without  the prior
written  consent  of  Landlord.  No nails,  hooks or  screws  shall be driven or
inserted in any part of the Building except by personnel of Landlord or retained
by  Landlord.  No curtains  or other  window  treatments  shall be placed on the
glass, without Landlord's prior approval.  No lighting which may be visible from
the exterior of the Premises may be utilized without Landlord's prior approval.

         4. Landlord may provide and maintain an alphabetical directory for  all
tenants in the main lobby of the Building.

         5. Landlord shall provide all door locks in Tenant's  Premises,  at the
cost of Tenant,  and  Tenant  shall not place any  additional  door locks in its
Premises without  Landlord's  prior written  consent.  Landlord shall furnish to
Tenant a reasonable  number of keys to the door lock's in Tenant's Premises free
of cost and additional keys, at Tenant's cost. Tenant shall not make a duplicate
of any key. All keys are to be returned to Landlord at the expiration or earlier
termination of this Lease.

         6. Movement in or out of the Building of furniture or office equipment,
or dispatch or receipt by Tenant of any  merchandise or materials  which require
use of elevators or stairways, common area loading docks or movement through the
Building  entrances or lobby shall be conducted under Landlord's  supervision at
such times and in such a manner as Landlord may reasonably  require. At the time
of seeking Landlord's approval,  Tenant shall provide to Landlord, in writing, a
detailed  listing  of the  activity.  Tenant  assumes  all risks of and shall be
liable for all damage to  articles  moved and injury to persons  resulting  from
such activity. If any equipment,  property and personnel of Landlord are damaged
or injured as a result of acts in  connection  with this  activity,  then Tenant
shall be solely liable for any and all damage or loss resulting therefrom.

         7.  Landlord  may  prescribe  weight   limitations  and  determine  the
locations for safes and other heavy equipment or items, which shall in all cases
be placed in the  Building  so as to  distribute  weight in a manner  which will
avoid  damage to the  Building,  which may  include  the use of such  supporting
devices  as  Landlord  may  require,  and which may not in any case  exceed  the
acceptable floor loading and weight  distribution for the Building.  All damages
to the  Building  caused by the  installation  or removal of any  property  of a
tenant, or done by a tenant's property while in the Building,  shall be repaired
at the expense of such tenant.

         8.       Corridor doors, when not in use, shall be kept closed.

         9. No birds or animals  (except  seeing eye dogs) shall be brought into
or kept in, on or about the  Premises.  No portion of the Premises  shall at any
time be used or occupied  as sleeping or lodging  quarters or for any immoral or
illegal purposes or for any purpose which would tend to injure the reputation of
the Building or impair the value of the Building.

<PAGE>


         10. Tenant shall not commit waste and shall keep its Premises  neat and
clean. All trash and debris must be placed in receptacles provided therefor.

         11.  Tenant  shall not make or permit any  improper,  objectionable  or
unpleasant  noises or odors to emanate  from the  Premises to other parts of the
Building or otherwise  interfere in any way with other tenants or persons having
business with them,  shall not solicit  business or  distribute,  or cause to be
distributed, in any portion of the Building any handbills, promotional materials
or other  advertising,  and shall not conduct or permit any other  activities in
the Building that might  constitute a nuisance.  Tenant shall not do any cooking
or operate a restaurant or food service business from the Premises (other than a
microwave oven for use by its employees or a beverage service that is free or of
nominal charge for use by employees and invitees).

         12. No machinery of any kind (other than normal office equipment) shall
be  operated  by  Tenant  on  its  Premises  without  Landlord's  prior  written
reasonable consent.

         13. No flammable, explosive  or  dangerous fluid or  substance shall be
used or kept by Tenant in the Premises.

         14.  Landlord  will  not be  responsible  for lost or  stolen  personal
property,  money  or  jewelry  from the  Premises  or  public  or  common  areas
regardless of whether such loss occurs when the area is locked  against entry or
not.

         15.  No  coin,  vending  or  dispensing  machines  of any  kind  may be
maintained  in any  Premises,  except that Tenant may from time to time maintain
soft drink  machines  for use by its  employees  and  invitees on a no-charge or
nominal charge basis.

         16. All mail chutes  located in the Building shall be available for use
by Landlord and all tenants of the Building according to the rules of the United
States Postal Service.

         17.  Neither  Tenant nor any agent,  contractor  or  employee of Tenant
shall have any right of access to the roof of the  Premises or the  Building and
neither shall install, repair, place or replace any aerial, fan, air conditioner
or other device on the roof of the  Premises or the  Building  without the prior
written  consent of Landlord.  Such consent may be  expressly  conditioned  upon
Landlord's  supervision  of access to the roof and upon  such  other  reasonable
restrictions as Landlord may advise Tenant. Any aerial,  fan, air conditioner or
device  installed  without such written consent shall be subject to removal,  at
Tenant's  expense,  without notice,  at any time. Tenant shall be liable for all
damages  resulting  from the  installation  or removal of any aerial,  fan,  air
conditioner or other device.

         18. Tenant will refer to Landlord for Landlord's supervision,  approval
and  control  all  contractors,  contractor  representatives,  and  installation
technicians   rendering  any  service  to  Tenant,  before  performance  of  any
contractual  service.  Such  supervisory  action by  Landlord  shall not  render
Landlord  responsible  for any work performed for Tenant.  This provision  shall
apply to all work performed in the Building,  including, without limitation, the
installation  of  telephones,  computer  wiring,  cabling,  electrical  devices,
attachments and installations of any nature.  Tenant shall be solely responsible
for complying with all applicable laws,  codes and ordinances  pursuant to which
such work shall be performed.

         19.  Landlord may from time to time (without any obligation to do so or
liability for not doing so) adopt  appropriate  systems and  procedures  for the
security  or safety  of the  Building,  its  occupants,  entry  and use,  or its
contents and Tenant,  its  employees,  contractors,  agents and  invitees  shall
comply therewith.

         20.  Canvassing,  soliciting,  and peddling in or about the Building is
prohibited  and Tenant shall  cooperate  and use  reasonable  efforts to prevent
same.

         21. At no time shall Tenant permit or shall Tenant's agents, employees,
contractors,  quests,  or  invitees  smoke in any common  area of the  Building,
unless such common area has been declared a designated smoking area by Landlord.

         22.  Tenant  accepts any and all  liability for damages and injuries to
persons and property resulting from the serving and sales of alcoholic beverages
from the Premises. Nothing contained herein shall be construed as the consent of
Landlord to permit the serving or sale of alcoholic beverages on the Premises.

         B. The  Landlord  reserves  the right to rescind any of these rules and
make such other and further rules and regulations as in the judgment of Landlord
shall  from  time  to time  be  needed  for the  safety,  protection,  care  and
cleanliness of the Building,  the operation  thereof,  the  preservation of good
order  therein,  and the  protection  and comfort of its tenants,  their agents,
employees and invitees, which rules when made and notice thereof given to Tenant
shall be binding upon him in like manner as if originally herein prescribed.

<PAGE>

                                   EXHIBIT "E"
                                   WORK LETTER

         This Exhibit is  attached to made  a part  of the Lease by and  between
AETNA LIFE INSURANCE COMPANY  ("Landlord") and PHYMED, INC., a Texas Corporation
("Tenant").

         A. Definitions.  Each term  used  in this  Work Letter  shall have  the
meaning hereinafter set forth:

1. "Architect" shall mean the architect selected by Landlord and responsible for
the drafting of the Plans and  Specifications and shall coordinate and supervise
with the Contractor the construction of the leasehold improvements.

2. "Construction Costs" shall mean all costs incurred in the construction of the
leasehold  improvements  in  accordance  with the Plans and  Specifications,  as
modified  from  time to time in  accordance  with the  provisions  of this  Work
Letter.  Such costs shall  include all hard costs and soft costs to complete the
improvements.  Hard costs shall include such costs as labor and materials.  Soft
costs shall include such cost as architectural  and engineering  fees, but shall
exclude  any  interest  incurred  on funds  expended  during  the  course of the
construction.  The cost of  signage  shall  not be part of  Construction  Costs,
unless this blank is checked x .

3. "Contractor"  shall mean the contractor  selected by Landlord and responsible
for the construction of leasehold improvements.

4. "Plans and Specifications"  shall mean the final plans and specifications for
the construction of leasehold  improvements mutually agreed upon by Landlord and
Tenant, in accordance with the provisions of Section B. 1 of this Work Letter.

5. "Tenant Delay" shall mean any delay in the construction of the Work caused by
Tenant  for  any  reason  whatsoever.  In  the  event  of a  Tenant  Delay,  the
Commencement Date shall be accelerated one (1) day for every day of delay caused
by Tenant.

6.  "Tenant  Improvement  Allowance"  shall mean the sum of $ N/A (or $ 0.00 per
square  foot of  rentable  area times N/A square  feet of  rentable  area) which
Landlord agrees to pay towards the Construction Costs.

7. "Work" shall mean the construction of leasehold  improvements on the Premises
in accordance with the Plans and Specifications.


         B.  Construction  of  Premises.  Landlord  shall  cause  the Work to be
constructed  substantially  in  accordance  with the Plans  and  Specifications.
Tenant shall  cooperate at all stages to promote the efficient  and  expeditious
completion  of the Work.  Upon  approval  of the Plans  and  Specifications  and
payment of any excess,  as  hereinafter  described,  Landlord shall enter into a
construction contract with the Contractor.  Landlord makes no representations or
warranties as to the Work and shall have no liability therefor;  Landlord's sole
obligation  shall be to enforce any warranty from the Contractor with respect to
the Work.

1. Plans and Specifications  Approval. Upon execution of the Lease, Tenant shall
furnish  to  Landlord  and  the  Architect   preliminary  space  plans  for  the
construction  of the Work which the Architect shall use to prepare and submit to
Landlord  within the next N/A (___) days the proposed  plans and  specifications
for the Work.  Landlord  shall  thereafter  have N/A (___) days within  which to
approve the proposed plans and  specifications  or  disapprove,  in which event,
Landlord shall advise Tenant and the Architect,  in writing,  of the reasons for
its  disapproval.  The  Architect  shall  have N/A  (___)  days from the date of
written disapproval from Landlord to make the adjustments  required by Landlord,
and  resubmit  the revised  plans and  specifications  to  Landlord  and Tenant.
Thereafter,  Landlord  shall again have N/A (___) days to approve or  disapprove
the revised plans and specifications.  If Tenant fails to submit the preliminary
space plans on a timely basis, it shall  constitute a Tenant Delay. The approval
of the Plans and  Specifications  by  Landlord  shall  not be  construed  as any
representation or warranty by Landlord with respect to the accuracy of the Plans
and Specifications or their compliance with applicable laws, including,  without
limitation,  compliance with the Americans With  Disabilities  Act, for which it
shall be the sole  responsibility  of the Tenant to insure the  Premises  are in
compliance therewith.

<PAGE>


2. Tenant's Share of Costs.  Tenant shall be liable and pay for all Construction
Costs except to the extent of the Tenant  Improvement  Allowance  which shall be
paid by Landlord. Upon approval of the Plans and Specifications,  Landlord shall
obtain  estimates  of the  Construction  Costs from the  Contractor  and furnish
copies to Tenant.  In the event  such  estimates  exceed the Tenant  Improvement
Allowance,  Tenant shall pay the excess to Landlord within N/A (___) days of the
notice  from  Landlord  of the  estimate  costs and,  in any  event,  before the
commencement  of  construction.  If Tenant  fails to tender the  excess  timely,
Landlord shall not proceed with construction,  and such delay shall constitute a
Tenant Delay for each day until the excess is paid.  Upon receipt of the excess,
Landlord shall cause the Contractor to commence construction. Upon completion of
the  construction,  Landlord  shall provide to Tenant an accounting of the final
costs,  crediting  Tenant for the Tenant  Improvement  Allowance  and any excess
previously  paid to Landlord.  If any  additional  amounts are due and owing for
payment of  Construction  Costs  beyond  those  amounts  previously  tendered to
Landlord, Tenant shall pay same to Landlord within N/A (___) days after the date
such accounting was provided to Tenant.

3. Construction of the Work.  Following approval of the Plans and Specifications
and payment of any excess by Tenant,  either the Landlord or the Contractor,  as
appropriate,  shall  apply  for a  building  permit,  and the  Contractor  shall
commence  construction  of the Work  immediately  upon receipt of the permit and
proceed with all due diligence until substantial  completion.  The Work shall be
deemed to be substantially  complete upon (i) Landlord's obtaining a certificate
of occupancy or its equivalent from the appropriate  governmental  authority and
(ii) the  Work is  sufficiently  complete  in  accordance  with  the  Plans  and
Specifications so that Tenant may occupy the Premises,  subject to any punchlist
items.

4.  Unavoidable  Delays.  Tenant  and  Landlord  acknowledge  that  there may be
unavoidable  delays  in the  construction  of the  Work.  The term  "unavoidable
delays"  shall mean events  beyond the  control of  Landlord or the  Contractor,
including, without limitation, acts of God, war, civil commotion, strikes, fire,
flood, earthquake or other casualty,  governmental regulation or restriction and
adverse  weather  conditions  or  continued   possession  by  prior  tenants  or
occupants.

5. Changes. If Tenant requests a change,  alteration or addition after the final
Plans and Specifications have been approved, Tenant shall submit same in writing
to Landlord and to the  Architect.  If Landlord  approves such change,  Landlord
shall obtain from the Contractor and provide Tenant with an estimate of the cost
of such  change.  Tenant shall  notify  Landlord  within one (1) business day if
Tenant  elects to  proceed  with the  change,  in which  event,  Landlord  shall
incorporate  the  change  into the  Plans and  Specifications.  The cost of such
change shall also be incorporated in the calculation of the Construction  Costs.
If Landlord  disapproves of such change, it shall  immediately  notify Tenant in
writing  specifying the reasons for such disapproval and the construction  shall
proceed  in  accordance   with  the   previously   approved,   final  Plans  and
Specifications. Any delay in construction time (determined in accordance with he
next  sentence)  caused by such changes  shall  constitute a Tenant  Delay.  The
Architect,  in  his  sole  discretion,   shall  determine  whether  such  change
necessitates a delay in construction and the length of such delay.

6. Governmental Regulations.  Tenant shall be solely responsible for causing the
design and  construction  of the Work to conform to any and all  requirements of
applicable building, plumbing, electrical and fire codes and the requirements of
any authority having  jurisdiction over the Work, as such codes and requirements
may from time to time be amended or supplemented.

7. Entry by Tenant.  During the course of construction  of the Work,  Tenant may
enter the  Premises  for  purposes  of  inspecting  the Work,  installing  trade
fixtures,  erecting  signs,  stocking  merchandise and such other Work as may be
necessary or  desirable  to prepare to occupy and conduct its business  from the
Premises,  provided  that (i)  Tenant  assumes  the risk of injury to person and
damage to its  property,  (ii) any entry shall be subject to the  provisions  of
this Lease,  except that the Lease Term shall not commence and rent shall not be
due, and (iii) Tenant shall not unreasonably  interfere with the construction of
the Work on the Premises.  Tenant shall also provide evidence of insurance prior
to any such entry.  If such entry shall  interfere with the  construction of the
Work, then Tenant shall immediately leave upon the request of Landlord.

         C. Delivery of the Premises. Subject to unavoidable delays, the Work is
estimated to be  substantially  completed for delivery of the Premises to Tenant
by the Commencement  Date. If an unavoidable  delay will prevent the substantial
completion of the Work prior to the scheduled  Commencement  Date, then Landlord
will notify Tenant in writing. Upon substantial completion of the Work, Landlord
will notify  Tenant in writing and afford Tenant an  opportunity  to inspect the
Premises prior to delivery. At the inspection,  Landlord and Tenant will prepare
and agree upon a punchlist of any items that remain to be completed.

<PAGE>


         If the  Work is  substantially  completed  to  permit  delivery  of the
Premises prior to the Commencement Date, Landlord shall notify Tenant in writing
and, should Tenant elects to take occupancy  early,  then Tenant may inspect the
Premises and prepare, with Landlord, a punchlist prior to delivery.

         D. Limitation.  This Exhibit shall  not  be  deemed  applicable to  any
additional space added to the original Premises or, in the event of a renewal of
the Lease Term,  to the  original  Premises,  itself,  during the renewal  term,
unless expressly so provided in the Lease or any amendment thereto.
















<PAGE>


                                   EXHIBIT "F"

                            COMMENCEMENT DATE LETTER

         This Exhibit is attached to and made a part of the Lease by and between
AETNA LIFE INSURANCE  COMPANY  ("Landlord")  PHYMED,  INC., a Texas  Corporation
("Tenant").

          1.   The Lease Term commenced on September 1, 1999.

          2.   The Lease Term will expire on August 31, 2004 , unless renewed or
extended.


          3.   Tenant   acknowledges   that  the  Work  has  been  completed  in
accordance with the Plans and  Specifications  and accepts such Work, subject to
any punch list items being completed.

          4.   Tenant,   further,   acknowledges  that  any  tenant  improvement
allowance  owed to  Tenant  or  other  obligations  of  Landlord  to  Tenant  in
connection with the Work and all other conditions  precedent to the commencement
of the Lease Term have occurred and that the Lease is in full force and effect.

          5.   There are no existing  defenses or offsets which,  as of the date
hereof, Tenant has against the enforcement of the Lease by Landlord.

         EXECUTED on the ____ day of ____________, 19__.


                                              LANDLORD:

                                              AETNA LIFE INSURANCE COMPANY

                                              By:  Allegis Realty Investors LLC,
                                              Its Investment Advisor and Agent

                                              By:
                                                  ----------------------------

                                              Printed Name:  James G. Hughes
                                              Title:  Vice President

ATTEST:                                       TENANT:

                                              PHYMED, INC., a Texas Corporation

                                              By:
- -------------------------------------             ----------------------------
               (Title)
                                              Printed Name:  George Barker
                                              Title:  President


<PAGE>


                                   EXHIBIT "M"
                               SPECIAL CONDITIONS

         This Exhibit is attached to and made a part of the Lease by and between
AETNA LIFE INSURANCE COMPANY  ("Landlord") and PHYMED, INC., a Texas Corporation
("Tenant").

SPECIAL ALTERATIONS AND ADDITIONS BY TENANT

Tenant  acknowledges that the Premises  presently  contain a Magnetic  Resonance
Imager (MRI) and related equipment,  including but not limited to lead shielding
and other Leasehold improvements. Should Tenant repair, replace or in any manner
alter the MRI or other related  equipment in any manner that alters the Project,
Building or Premises (specifically  including but not limited to the exterior of
the  Building,  the  windows,  parking  areas and  landscaping),  Tenant will be
required to receive  landlord's  prior written consent to begin such alterations
and such consent shall be conditioned upon Landlord's approval of the following:
(i) Tenant's  contractor(s);  (ii)  detailed  plans and work  specifications  of
Tenant   Alterations;   and  (iii)   certificates  of  insurance  from  Tenant's
contractor(s)  as listed in Paragraph 9 of the Lease.  In addition,  Tenant must
obtain  all  approvals  and  permits   required  by  any  and  all  governmental
authorities  and provide same to Landlord prior to commencement of any work, and
after work  commences  must comply with all  conditions  of such  approvals  and
permits  to  perform  work in a prompt  and  expeditious  manner  with  good and
sufficient  materials.  Upon completion of each alteration or upon the demand of
Landlord,  Tenant shall immediately  commence to make any and all repairs to the
Project, Building and Premises and return them to their original condition prior
to the  commencement  of the  alterations,  all at  Tenant's  sole  cost  and to
Landlord's  satisfaction.  If  Tenant  does not  commence  to make the  required
repairs or the repairs are not made to  Landlord's  satisfaction,  Landlord  may
immediately  commence to do so, at Tenant's sole cost plus a construction fee of
fifteen percent (15%).

MAGNETIC RESONANCE IMAGERS

Notwithstanding  anything  contained within the Lease to the contrary,  Landlord
hereby agrees to allow Tenant to assemble and operate Magnetic Resonance Imaging
(MRI) machines  within the Leased Premises and to vent the machine's waste gases
to the exterior of the building.  Tenant agrees to shield the aforementioned MRI
machine  with a steel  enclosure  and  conform  to all  applicable  governmental
standards, guidelines and codes. Design and location of venting machines must be
approved by Landlord.

SERVICE BY LANDLORD

Separate  meters are  currently  installed and future meters may be installed at
Landlord's option, to measure Tenant's use of electric,  water and other utility
services as a result of independent  janitorial services or the increased use of
such  metered  utility by Tenant.  Tenant  will be required to pay all such fees
associated with installation of submetering and actual submetering, upon demand,
with full documentation regarding the method of computation.

D.

Tenant herein agrees that in return for Landlord's permission to allow Tenant to
utilize its MRI units within the Leased  Premises that Tenant will  guarantee to
accommodate Landlord or any other effected Tenants in the project as a result of
the gauss line  emissions  or any other type of emissions as a result of its use
of its MRI units or any other equipment in the Lease Premises including, but not
limited to, the following:

1. Tenant  agrees that it will provide,  at its sole cost and expense,  whatever
shielding or other  protection  is necessary  to prevent  interference  with any
electrical or electric  equipment of other  Tenants  within the project that may
result from Tenant's use of its MRI units or other  equipment  within the Leased
Premises.

2. If Tenant is not able or willing to provide the necessary  shielding or other
protections  to these  suites,  Tenant  agrees  to lease  said  suites,  or,  at
Landlord's sole discretion,  the affected  portion of said suite,  provided that
the unleased portion is in a leasable  configuration,  (Landlord's sole option),
on the same terms and  conditions of this Lease except that the rate shall be at
the then market rate unless the market rate is less than the rate then in effect
on Tenant's Premises in which case the higher rate shall prevail.  Additionally,
Tenant  agrees to pay all cost of  relocation  (including,  but not  limited to,

<PAGE>

Tenant  improvements,  relocation of phone  systems,  reprinting of  stationary,
moving costs, etc.) of the Tenants of the effected suites and any loss income of
any nature to the Landlord  (including  Landlord's  inability  to find  suitable
space for such  Tenants  within the project and its  resulting  additional  lost
income  therefrom)  as a result of the  unwillingness  or inability of Tenant to
provide the necessary shielding or protection as indicated herein.

3. If Tenant fails to provide the necessary shielding or protection as indicated
herein, or in the alternative, fails to pay all costs associated with relocating
any  Tenants in effected  suites,  such  failure  shall  constitute  an event of
default  under  this Lease and in  addition  to any other  rights  and  remedies
Landlord may have  hereunder or at law,  Landlord  shall have the right,  at its
sole option to (1) provide  whatever  shielding or other protection is necessary
to prevent  interference  with any  electrical  or electric  equipment  of other
Tenants within the project that may result from Tenant's use of its MRI units or
other equipment within the Leased Premises, or (2) as provided in subparagraph 2
above.

E.

Tenant herein agrees that it will be responsible  for any and all submetering or
other  electrical  alterations,  additions,  or deletions to the Premises or the
project in general as a result of its use of its suite or suites  past,  present
or future.  Tenant  agrees that upon  termination  of this Lease for any reason,
Tenant shall at its sole cost and at  Landlord's  option  return the  electrical
system to its  condition  prior to Tenant's use of the  Premises.  Additionally,
Tenant agrees that it will pay all costs of electrical  usage and water usage as
a result of after hours and above normal use in its Premises.

F.

Tenant herein agrees and understands that all construction  plans for the Leased
Premises or future Premises are subject to review and express  written  approval
and supervision of the architects and engineers of Landlord.

G.

In addition to Tenant's  obligation set forth in Paragraph D of this Exhibit, at
the termination of this Lease, Tenant shall, at its sole cost, and at Landlord's
option,  remove  any  improvements  made to the  Leased  Premises  by  Tenant or
Tenant's equipment,  including, without limitation, any alterations or additions
made to the Leased  Premises to accommodate the MRI units or other equipment and
restore the Leased  Premises to the existing  condition as of September 1, 1999,
at Tenant's sole cost and expense.

END OF SPECIAL PROVISIONS







<TABLE> <S> <C>


<ARTICLE>                       5
<LEGEND>
</LEGEND>
<CIK>                           0000353904
<NAME>                          PHYMED, INC.
<MULTIPLIER>                                               1
<CURRENCY>                                                 US DOLLARS


<S>                             <C>
<PERIOD-TYPE>                    Year
<FISCAL-YEAR-END>                                          DEC-31-1998
<PERIOD-START>                                             JAN-01-1998
<PERIOD-END>                                               DEC-31-1998
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                                                0
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