MEDICAL DYNAMICS INC
8-K, 1999-03-23
PHOTOGRAPHIC EQUIPMENT & SUPPLIES
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                       SECURITIES AND EXCHANGE COMMISSION
                                Washington, D.C.

                                    FORM 8-K

                 CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d)
                     OF THE SECURITIES EXCHANGE ACT OF 1934

                         Date of Report: March 18, 1999


                             MEDICAL DYNAMICS, INC.
                             ----------------------
             (Exact name of Registrant as specified in its charter)

                         Commission file number: 0-8632

          Colorado                                        84-0631765
          --------                                        ----------
(State or other jurisdiction of                           (IRS Employer
incorporation or organization)                            Identification Number)


         99 Inverness Drive East
           Englewood, Colorado                               80112
           -------------------                               -----
(Address of principal executive offices)                  (Zip Code)


               Registrant's telephone number, including area code:
                                 (303) 790-2990

                                 not applicable
                                 --------------
                  former name or former address, if applicable

<PAGE>


Item 5. Other Events.
- ---------------------

Amendment to Tail Wind Agreements
- ---------------------------------

     On  March  18,  1999,  Medical  Dynamics,  Inc.  ("MEDY")  entered  into an
agreement with The Tail Wind Fund,  Ltd. ("Tail Wind") to amend the terms of the
Purchase Agreement dated July 31, 1998, by which Tail Wind purchased  $1,100,000
of convertible  debentures  and committed to purchase an additional  $400,000 in
debentures (the "1998 Debentures"), as announced in MEDY's Form 8-K reporting an
event of July 31,  1998.  Tail Wind  acquired  the  additional  $400,000 in 1998
Debentures  in November  1998  pursuant to the first  amendment  to the Purchase
Agreement.  Earlier  amendments  to the Purchase  Agreement  were  reported in a
current report on Form 8-K reporting an event of March 4, 1999.

     The current amendment accomplished the following:

1.   Tail Wind agreed to consent to a variable rate transaction.  As a result of
     Tail Wind's  consent,  MEDY  accomplished  a variable rate  transaction  as
     described under "Resonance Limited Purchase" below.

2.   Tail Wind surrendered 84,615 common stock purchase warrants it had acquired
     in an earlier  (October  1997)  debenture  purchase  transaction.  MEDY has
     canceled these warrants.

3.   Tail  Wind and MEDY  agreed  to reduce  the  conversion  price for the 1998
     Debentures  from 100% of "Market Price" (defined in the Tail Wind agreement
     to be the average of the two lowest  closing bid prices of the Common Stock
     as  reported  by The Nasdaq  Stock  Market  over the 60 trading  day period
     immediately  preceding  the  determination  date) to 85% of Market Price as
     defined.

4.   Tail Wind agreed to waive approximately $120,000 liquidated damages payable
     by MEDY as a result of the registration statement for the shares underlying
     the 1998 Debentures and warrants  issued in connection  therewith not being
     effective  within the time  periods  required  in the  Registration  Rights
     agreement.  After March 18, 1999, the liquidated damages will accrue at the
     rate of $30,000 per month until the registration statement is effective.

5.   MEDY also  agreed  to pay Tail  Wind  $20,000  to  reimburse  Tail Wind for
     expenses  incurred in connection  with the  registration  statement and the
     amendments.

Resonance Limited Purchase
- --------------------------

     On March 18, 1999,  Resonance Limited,  an unaffiliated  company located in
the Isle of Man,  British Isles,  purchased  523,834 shares of MEDY common stock
for  $800,000.  MEDY agreed to file a  registration  statement  related to these
shares  not later  than  April  16,  1999 and to  obtain  effectiveness  of that
registration statement by no later than July 30, 1999. In addition,  MEDY agreed
to issue "additional shares" to Resonance at various  "determination dates." The
determination  dates  are two,  four,  and six  months  after  the  registration
statement for the shares issued to Resonance  becomes  effective.  The number of
additional shares to be issued to Resonance are intended to compensate Resonance
for  one-third  of the  decrease in market  price of MEDY common  stock (if any)
during the period following the original purchase. MEDY is obligated to issue no
more than 2,060,033 shares and warrants pursuant to this obligation (the "Future
Priced Securities Cap").


<PAGE>



     After six months from the effective date of the registration  statement for
the shares  purchased by Resonance (and subject to the Future Priced  Securities
cap), MEDY will issue  Resonance a warrant to purchase  523,834 shares for a six
month period at $1.5272. Following the issuance of the additional shares and the
warrant,  MEDY will be obligated to file an additional  registration relating to
the  additional  shares  (if any) and  shares of  common  stock  underlying  the
warrant. The number of shares underlying the warrant may be reduced in number if
necessary to comply with the Nasd's future  priced  securities  limitation.  The
issuance  of the common  shares  and  warrants  to  Resonance  will  result in a
dilution adjustment to warrants held by Tail Wind.

     After  paying  expenses of and fees related to the  transaction,  MEDY will
receive net proceeds of approximately  $700,000.  MEDY will use the proceeds for
working capital.

Item 7. Financial Statements and Exhibits
- -----------------------------------------

     (A) and (B) Financial Statements

          None

     (C) Exhibits

     1.   Amendment No. 3 to Purchase  Agreement between Medical Dynamics,  Inc.
          and The Tail Wind Fund, Ltd.

     2.   Purchase  Agreement  between  Medical  Dynamics,  Inc.  and  Resonance
          Limited.

     3.   Registration  Rights Agreement  between Medical Dynamics and Resonance
          Limited.


                                   SIGNATURES

     Pursuant to the  requirements  of the  Securities  Exchange Act of 1934, as
amended,  the  registrant has duly caused this report to be signed on its behalf
by the undersigned hereunto duly authorized.

                                           MEDICAL DYNAMICS, INC.



March 23, 1999                             By: /s/ Van A. Horsley
                                               ---------------------------------
                                               Van A. Horsley, President





                               Amendment No. 3 to
                               PURCHASE AGREEMENT
                               ------------------
                                       and
                               Amendment No. 1 to
                          REGISTRATION RIGHTS AGREEMENT
                          -----------------------------



     THIS  AGREEMENT  (this  "Amendment")  is dated as of March  18,  1999,  and
constitutes:  (i)  Amendment  No. 2 to the  Purchase  Agreement  (the  "Purchase
Agreement") by and between Medical Dynamics,  Inc., a Colorado  corporation (the
"Company"),  and The Tail Wind Fund,  Ltd.,  a British  Virgin  Islands  limited
liability company (the "Investor")  which Purchase  Agreement was made as of the
31st day of July,  1998,  as amended by Amendment  No. 1 dated October 30, 1998;
and (ii) Amendment No. 1 to the Registration Rights Agreement (the "Registration
Rights  Agreement")  between  the Company and the  Investor  which  Registration
Rights Agreement was made as of the 31st day of July, 1998.

     In  consideration of the mutual promises made herein and for other good and
valuable  consideration,   the  receipt  and  sufficiency  of  which  is  hereby
acknowledged, the parties hereto agree as follows:

1.   Amendments to the Purchase Agreement.  The Purchase Agreement be and hereby
     is amended as follows:

     (a)  All  references  in the Purchase  Agreement  or  documents  referenced
          therein  to  the  "Registration   Rights  Agreement"  shall  mean  the
          Registration Rights Agreement as amended hereby.

     (b)  Pursuant to  Paragraph  7.1 of the  Purchase  Agreement,  the Investor
          hereby consents to the issuance of one Variable Rate Transaction of up
          to $800,000  subject to review and approval of the agreements by which
          such Variable Rate Transaction will be implemented,  and provided that
          to the extent the aggregate purchase price exceeds $750,000,  at least
          one-half  of the  amount in excess  of  $750,000  will be spent by the
          Company for advertising and public  relations as an increment over the
          amount dedicated to that purpose in the Company's fiscal 1998.

2.   Registration  Rights  Agreement.  The Registration  Rights Agreement be and
     hereby is amended as follows:

     (a)  Paragraph 2(c) of the  Registration  Rights  Agreement to provide that
          the  liquidated  damages  penalty  provided  therein is waived through
          March 18,  1999,  provided  further  that the  Company  will have nine
          months to pay any liquidated damages penalty to the Investor.

Amendment - Medical Dynamics, Inc. and The Tail Wind Fund, Ltd.           Page 1

<PAGE>



3.   Convertible  Debentures.  The  convertible  debentures  dated July 31, 1999
     (CD98-001  through  CD98-011) and dated November 18, 1998 (CD98-012 through
     CD98-015)  (each a "Debenture")  be and hereby are amended as follows which
     amendment is in addition to Amendment  No. 1 to the  Convertible  Debenture
     dated July 31, 1999:

     (a)  The first  sentence of Paragraph 2(f) be and hereby is amended to read
          as follows:

          "The Conversion Price per share ( "Conversion  Price") at which shares
          of Common Stock shall be issuable upon  conversion  of this  Debenture
          shall  be  equal  to 85% of  the  Market  Price  on the  business  day
          immediately preceding the Conversion Date; provided, however, that the
          Conversion Price shall not exceed the Ceiling Price (defined below)."

     (b)  The last clause of Paragraph 2(f) which provided for a minimum Ceiling
          Price  ("but in no event  shall the  Ceiling  Price be  adjusted to an
          amount less than $2.25") be and hereby is deleted. As a result of such
          amendment, Paragraph 2(f) of the Debenture concludes as follows:

          ". . .;  provided,  however,  that the Ceiling Price shall be adjusted
          effective  upon the second  anniversary  of the Purchase  Agreement to
          105% of the Market Price on such date, if such adjustment would result
          in a lower price."

4.   Surrender  of 1997 Common Stock  Purchase  Warrants.  The  Investor  hereby
     surrenders for cancellation common stock purchase warrants it holds for the
     purchase of 84,615 shares of the  Company's  common stock dated October 31,
     1997,  and the Company  hereby  cancels said  warrants.  The Investor  will
     deliver the original warrant agreement to the Company.

5.   Reimbursement  of  Expenses.  Upon  the  completion  of the  Variable  Rate
     Transaction  described in Paragraph 1(b),  above,  the Company will pay the
     Investor $20,000 to reimburse the Investor for expenses it has incurred.

6.   This  Amendment  to the  Purchase  Agreement  and the  Registration  Rights
     Agreement  constitutes  a  part  of  and a  modification  to  the  Purchase
     Agreement, the Registration Rights Agreement,  Warrant Agreements,  and the
     Debentures  as set forth  herein,  and  references  herein to the  Purchase
     Agreement,  the Registration Rights Agreement,  Warrant Agreement,  and the
     Debentures  shall mean the  Purchase  Agreement,  the  Registration  Rights
     Agreement,  Warrant  Agreements,  and the  Debentures  as modified  hereby.
     Except as modified hereby, the Purchase Agreement,  the Registration Rights
     Agreement,  the Warrant Agreements,  and the Debentures shall remain in ful
     force and effect in accordance with its stated provisions.

7.   This  Amendment  may  be  signed  in  counterparts,  each  of  which  shall
     constitute an original and which together shall constitute one and the same
     agreement.  Either  party hereby may confirm  legal  delivery of the signed
     counterparts by facsimile delivery of a copy of this Amendment to the other
     party.

Amendment - Medical Dynamics, Inc. and The Tail Wind Fund, Ltd.           Page 2

<PAGE>



8.   Capitalized  terms used  herein and not  otherwise  defined  shall have the
     meanings ascribed to them in the Purchase Agreement.

     IN WITNESS  WHEREOF,  the Company and the Investor have made this Amendment
as of the date first above written.

MEDICAL DYNAMICS, INC.                      THE TAIL WIND FUND, LTD.


By:____________________________             By: ________________________________
   Van A. Horsley, President                    Name:
                                                Title:




Amendment - Medical Dynamics, Inc. and The Tail Wind Fund, Ltd.           Page 3

<PAGE>



                               PURCHASE AGREEMENT
                               ------------------



     THIS PURCHASE AGREEMENT (the  "Agreement"),  dated as of March 17, 1999, is
entered into by and between RESONANCE  LIMITED,  a British Virgin Island Company
(the  "Purchaser")  and MEDICAL  DYNAMICS,  INC.,  a Colorado  corporation  (the
"Company").


     The parties hereto agree as follows:


          1.  Purchase  and  Sale.  Upon the  basis of the  representations  and
warranties, and subject to the terms and conditions set forth in this Agreement,
the Company  covenants  and agrees to sell to the  Purchaser  for $800,000  (the
"Purchase Price"):

               (a) Such  number of shares of the  Company's  Common  Stock,  par
value $.001 per share (the  "Shares"  and such Shares  deliverable  to Purchaser
under this Section 1(a) being referred to as the "Purchased Shares")which,  when
valued at 82% of their Market Price, as hereinafter  defined,  as of the date of
this Agreement (the "Effective Date") most nearly equals $800,000.

               (b) On the  expiration of two months,  four months and six months
following  the   Registration   Date  (as  defined  below)   additional   Shares
("Additional Shares") if the Per Share Market Price (as defined below) times the
number of Purchased  Shares (the "Market Value of the Purchased  Shares") on any
such date (each a  "Determination  Date") is less than the Purchase Price,  such
full number of  Additional  Shares the Market  Value of which on any  applicable
Determination  Date is most nearly  equal in value to one third the  amount,  if
any,  by which the  Purchase  Price  exceeds the Market  Value of the  Purchased
Shares on such Determination Date. By way of example, if the Market Price on the
Effective Date were $2.00 and $1.10 on the First  Determination  Date two months
following the Registration Date the number of Additional  Shares  deliverable on
the First Determination Date would be determined as follows:




<PAGE>


     (1)  Number of Purchased Shares          $800,000 / ($2.00 x .82) = 487,805

     (2)  Value of Purchased Shares on First 
          Determination Date                  $487,805 x $1.10 = $536,585

     (3)  Difference in value of Purchased
          Shares                              $800,000 - $536,585 = $263,413

     (4)  Number of Shares represented by
          Difference in Value                  263,413 / $1.10 = 239,467

     (5)  Additional Shares issuable on 
          First Determination Date             239,467 / 3 = 79,822 Shares


Anything  herein  to the  contrary  notwithstanding,  the  Company  will  not be
obligated  to issue any  Additional  Shares to the  extent  the total  number of
Purchased Shares and Shares  otherwise  issuable under this Paragraph 1(b) would
exceed 2,060,033 shares (20% of the total number of Shares outstanding as of the
Effective Date).

               (c) At the expiration of six months from the  Registration  Date,
such number of warrants in the form annexed hereto as Exhibit A (the "Warrants")
as are equal to the lesser of the number of Purchased  Shares issuable  pursuant
to Paragraph 1(a) and the amount by which 2,060,333 exceeds the number of shares
issuable under Paragraphs 1(a) and 1(b).

               For  purposes  herein,  (i) the Per Share Market Price shall mean
the  average  closing bid price of a Share for the 20 trading  days  immediately
preceding the date on which the Per Share Market Price is to be  determined  and
(ii) the Registration Date shall be the date on which the Registration Statement
on Form S-3 or any  successor  form filed  pursuant to the  Registration  Rights
Agreement referred to in Section 7(b) herein becomes effective.

          2.  Closing.  The closing of the  purchase  and sale of the  Purchased
Shares  pursuant  to Section 1 hereof  shall take place on March 19, 1999 by the
transfer of the Purchase Price by wire transfer in exchange for certificates for
the  Purchased  Shares  which  shall be held in escrow  pending  the  Closing by
counsel for the Purchaser.  The Additional  Shares,  if any, shall be issued and
delivered to Purchaser  promptly  after each  Determination  Date as provided in
Section  1(b)  above and the  Warrants  shall be  issued  and  delivered  on the
expiration of nine months from the Effective Date.

          3.  Representations,  Warranties and Covenants of the  Purchaser.  The
Purchaser  understands,  and  represents  and warrants to, and agrees with,  the
Company, that:

               (a) The Purchased Shares,  Additional Shares, Warrants and Shares
issuable on exercise of the Warrants (the  "Warrant  Shares") have not been and,
unless  registered under the Securities Act of 1933, as amended (the "Securities
Act"),  in  accordance  with the  Registration  Rights  Agreement (as defined in


<PAGE>


Section 7(b)),  will not be registered  under the  Securities  Act, or any other
applicable  securities  law,  and,  accordingly,   may  not  be  offered,  sold,
transferred,  pledged,  hypothecated  or otherwise  disposed of  ("Transferred")
unless  registered  under the  Securities  Act or  Transferred  in a transaction
exempt  from  registration  under the  Securities  Act and any other  applicable
securities law.

               (b) The Purchaser is an "accredited  investor" within the meaning
of Rule  215(a)  under  the  Securities  Act  (an  "Accredited  Investor").  The
Purchaser has such  knowledge and  experience in financial and business  matters
that it is capable of  evaluating  the merits and risks of an  investment in the
Shares. The Purchaser is aware that it may be required to bear the economic risk
of an investment in the Shares for an indefinite  period, and it is able to bear
such risk for an indefinite period.

               (c) The  Purchaser is acquiring or will acquire the Shares issued
or issuable to it hereunder or upon exercise of the Warrants  (collectively  the
"Registrable Shares") for its own account for investment purposes and not with a
view to, or for offer or sale in connection with, any distribution thereof.

               (d) The Company has furnished or made  available to the Purchaser
a full and  complete  set of its  most  recent  definitive  proxy  statement  in
connection with its annual meeting of stockholders and its Annual Report on Form
10-KSB for its most recently  completed  fiscal year,  its Form 10-QSB's for its
first fiscal  quarter since the end of its most recently  completed  fiscal year
and any Form 8-K's and  Registration  Statements filed during its current fiscal
year,  which the Company has filed  pursuant to the  Securities  Exchange Act of
1934, as amended (collectively, the "SEC Documents").

               (e) The  Purchaser's  investment  decision is based solely on the
SEC  Documents  and its own  inquiry,  including  (to the extent  the  Purchaser
determines appropriate and without limitation),  Purchaser's discussion with its
attorneys,  accountants,  investment, financial, and tax advisors. The Purchaser
was not presented the investment opportunity described in this Agreement through
any form of public  advertising  or general  solicitation.  The  Purchaser  will
notify the Company  immediately  if it becomes  aware of any  information  which
would  lead it to  believe  that  information  on which it relied in making  its
investment decision is inaccurate or incomplete in any material respect.

          4.   Representations  and  Warranties  of  the  Company.  The  Company
represents and warrants to, and agrees with, the Purchaser that:

               (a) The Company is a corporation duly organized, validly existing
and in good  standing  under  the  laws of the  state  of  Colorado  and is duly
qualified as a foreign  corporation in all jurisdictions in which the failure to
so  qualify  would  have a  material  adverse  effect  on the  Company  and  its
subsidiaries  taken as a whole.  The Company  has  registered  its Common  Stock
pursuant to Section 12 of the  Securities  Exchange Act of 1934, as amended (the
"Exchange  Act"),  and the Common Stock is listed and trades on the Nasdaq Small
Cap Market. The Company has filed all materials required to be filed pursuant to
all reporting  obligations  under either  Section 13(a) or 15(d) of the Exchange


<PAGE>


Act for at least twelve (12) months  immediately  preceding the offer or sale of
the Purchased Shares, and has received no notice,  either oral or written,  with
respect to the continued  eligibility  for such listing.  The Company has timely
made all filings  required under the Exchange Act during the twelve month period
preceding the date hereof and is eligible to use Form S-3 to register Shares for
sale by the Purchaser.

               (b)  This  Agreement,   the  Registration  Rights  Agreement  (as
referred to in Section 6(b)) and the Warrants have been duly authorized,  by all
necessary  corporate  action  including if necessary  approval by  shareholders,
executed  and  delivered  by  the  Company  and  constitute  valid  and  binding
agreements,  enforceable  in accordance  with their  respective  terms,  and the
Company has full  corporate  power and  authority  necessary  to enter into such
agreements and to perform its obligations thereunder.

               (c) No consent,  approval,  authorization  or order of any court,
governmental  agency or body or arbitrator having  jurisdiction over the Company
or any of its  affiliates  is required  for  execution  of this  Agreement,  the
Registration  Rights Agreement and the performance of its obligations under such
agreements,  including,  without  limitation,  the  issuance  and  sale  of  the
Purchased Shares and Additional Shares.

               (d)  Neither the sale of the Shares  pursuant to this  Agreement,
nor the performance of its obligations under this Agreement, or the Registration
Rights Agreement by the Company will:

                    (i)  violate,  conflict  with,  result  in a breach  of,  or
constitute  a default  (or an event which with the giving of notice or the lapse
of time or both would be reasonably  likely to  constitute a default)  under (A)
the  articles  of  incorporation  or by-laws  of the  Company,  (B) any  decree,
judgment,  order, law, treaty, rule,  regulation or determination  applicable to
the Company of any court,  governmental  agency or body,  or  arbitrator  having
jurisdiction  over the Company or over the  properties or assets of the Company,
(C)  the  terms  of  any  bond,  debenture,   note  or  any  other  evidence  of
indebtedness,  or any agreement,  stock option or other similar plan, indenture,
lease,  mortgage,  deed of trust or other  instrument  to which the Company is a
party,  by which the Company is bound,  or to which any of the properties of the
Company is subject,  (D) the terms of any  "lockup" or similar  provision of any
underwriting  or similar  agreement to which the Company is a party,  or (E) any
NASD Rule applicable to the Company and the continued listing of its Shares; or

                    (ii) result in the creation or imposition of any lien, claim
or other encumbrance upon any of the assets of the Company.

               (e) The Registrable  Shares,  when issued and delivered as herein
provided (i) will be free and clear of any security interests,  liens, claims or
other encumbrances,  (ii) will be duly and validly authorized and issued,  (iii)
will be fully paid and nonassessable,  (iv) will not have been issued or sold in
violation  of any  preemptive  or other  similar  rights of the  holders  of any
securities  of the  Company,  and (v) will not subject  the  holders  thereof to
personal liability by reason of being such holders.


<PAGE>


               (f) Except as set forth in the SEC Documents, there is no pending
or, to the best knowledge of the Company, threatened action, suit, proceeding or
investigation  before  any court,  governmental  agency or body,  or  arbitrator
having  jurisdiction  over  the  Company  or any of its  affiliates  that  would
materially  affect the results of  operations of the Company or the execution by
the Company of, or the performance by the Company of its obligations under, this
Agreement or the Registration Rights Agreement.

               (g) The Company, any person representing the Company, and, to the
best knowledge of the Company,  any other person selling or offering to sell the
Shares in connection with the transaction  contemplated by this Agreement,  have
not made, at any time, any oral  communication  in connection  with the offer or
sale of the Shares which  contained  any untrue  statement of a material fact or
omitted to state any material fact necessary in order to make the statements, in
the light of the circumstances under which they were made, not misleading.

               (h) Except as disclosed to the Purchaser or any of its affiliates
in writing  and except as noted by the NASD that the  characteristics  of Future
Price Securities often exert downward  pressure on the bid price of the issuer's
common  stock,  the  Company is not in  possession  of any  material  non-public
information that, if publicly disclosed,  would, or could reasonably be expected
to,  have an effect on the price of the  shares,  which is listed for trading on
the National  Association  of  Securities  Dealers  Automated  Quotations  Small
Capitalization system ("NASDAQ").

               (i)  Assuming  the  accuracy  of,  and   compliance   with,   the
representations,  warranties  and covenants of the Purchaser in this  Agreement,
the sale of the Shares  pursuant to this  Agreement  has been made in accordance
with the  provisions and  requirements  of Section 4(2) under the Securities Act
("Section 4(2)") and any applicable state law.

               (j) Neither the Company,  any  affiliate of the Company,  nor any
person  acting on behalf of the Company or any such  affiliate  has engaged,  or
will engage, in any general  solicitation or general advertising with respect to
the Purchased Shares.

               (k) The  Company  undertakes  and  agrees  to make all  necessary
filings in connection with its sale of the Registrable Shares as required by the
United States laws and NASD regulations for listing on NASDAQ.

               (l) Except as set forth in the SEC Documents, since September 30,
1998, there has been no material adverse development in the assets, liabilities,
business properties, operations, financial condition or results of operations of
the Company and its  subsidiaries  taken as a whole,  except as disclosed in the
filings in the SEC Documents.

               (m)  Neither  the  filing of the  10-KSB  for 1998 nor any of the
filings of the Company with the SEC since then contained,  at the time they were
filed,  any untrue statement of a material fact or omitted to state any material
fact required to be stated therein or necessary to make the statements  therein,


<PAGE>


in light of the  circumstances  under which they were made, not misleading.  The
Company has since January 1, 1997 timely filed all requisite forms,  reports and
exhibits thereto with the SEC.

               (n) Except as set forth in the SEC  Documents,  there is no known
fact to the Company or any subsidiary  (other than general  economic  conditions
generally  known to the public)  that has not been  disclosed  in writing to the
Purchaser  that (i) could  reasonably  be  expected  to have a material  adverse
effect on the condition  (financial  or otherwise) or in the earnings,  business
affairs,  business  prospects,  properties  or  assets  of  the  Company  or any
subsidiary,  or (ii) could  reasonably be expected to  materially  and adversely
affect the ability of the Company or any  subsidiary to perform its  obligations
pursuant to this Agreement.

          5. Covenants of the Company. The Company covenants and agrees with the
Purchaser:

               (a) to comply with all  requirements of Section 4(2) with respect
to the sale of the Purchased Shares;

               (b) to notify the  Purchaser  promptly  if at any time during the
period  beginning on the date of this  Agreement  and ending on the Closing Date
(i) any event shall have  occurred  as a result of which any oral  communication
made by the  Company,  any  person  representing  the  Company,  or, to the best
knowledge  of  the  Company,   by  any  other  person  in  connection  with  the
transactions contemplated by this Agreement would include an untrue statement of
a material fact or omit to state an material fact necessary in order to make the
statements  therein,  in the light of the  circumstances  under  which they were
made,  not  misleading,  or (ii)  there is any  public  disclosure  of  material
information  regarding  the  Company or its  financial  condition  or results of
operation;

               (c) to cause the Purchased  Shares,  the Additional  Shares,  the
Warrants and the Warrant Shares to be, upon delivery, fully paid, nonassessable,
free of  preemptive  rights and free from all taxes,  liens,  charges,  security
interests or other encumbrances;

               (d) to have at all times  authorized  and reserved for  issuance,
free  from  preemptive  rights,  a  sufficient  number  of  Shares  to cover the
Additional Shares and the Shares issuable upon exercise of the Warrants;

               (e) to comply with all relevant  requirements  and  procedures of
the  NASD in  connection  with  the  issuance  and  listing  of the  Registrable
Securities on NASDAQ.

          6.   Conditions   Precedent  to  the  Purchaser's   Obligations.   The
obligations  of the Purchaser  hereunder are subject to the  performance  by the
Company of its  obligations  hereunder and to the  satisfaction of the following
additional conditions precedent:
                        
               (a) The  representations  and  warranties  made by the Company in
this Agreement shall, unless waived by the Purchaser, be true and correct in all
material  respects as of the date hereof and at the Closing Date,  with the same
force and effect as if they had been made on and as of the Closing Date.


<PAGE>


               (b) The  Company  and the  Purchaser  shall have  entered  into a
Registration   Rights  Agreement  (the   "Registration   Rights  Agreement")  in
substantially the form annexed hereto as Exhibit B.

               (c) The  Company  will  provide an opinion of counsel in form and
substance agreed to by Purchaser.

               (d) None of the following  shall have  occurred:  (i) any general
suspension  of trading in, or  limitation on prices listed for, the Common Stock
on the NASDAQ,  (ii) a declaration of a banking  moratorium or any suspension of
payments in respect to banks in the United  States,  (iii) a  commencement  of a
war, armed  hostilities or other  international or national calamity directly or
indirectly  involving  the  United  States,  (iv) in the  case of the  foregoing
existing at the date of thi  Agreement,  a material  acceleration  or  worsening
thereof, (v) any limitation by the federal or state authorities on the extension
of credit by lending  institutions  that  materially  and adversely  affects the
Purchaser.

          7. Conditions Precedent to the Company's Obligations.  The obligations
of the Company  hereunder are subject to the performance by the Purchaser of its
obligations  hereunder and to the  satisfaction of the condition  precedent that
the  representations  and  warranties  made by the  Purchaser in this  Agreement
shall,  unless  waived  by the  Company,  be true and  correct  in all  material
respects as of the date hereof and at the Closing Date,  with the same force and
effect as if they had been made on and as of the Closing Date.

          8.  Legend.   Each   certificate   evidencing  the  Shares,   and  any
certificates issued upon transfer or exchange of such Shares shall be stamped or
imprinted with a legend substantially as follows:
                        

     THE SECURITIES  REPRESENTED  HEREBY HAVE NOT BEEN REGISTERED UNDER THE
     SECURITIES ACT OF 1933, AS AMENDED,  OR UNDER THE  SECURITIES  LAWS OF
     ANY  STATE;  AND MAY NOT BE SOLD,  ASSIGNED,  TRANSFERRED,  PLEDGED OR
     OTHERWISE  DISPOSED OF EXCEPT IN  COMPLIANCE  WITH,  OR PURSUANT TO AN
     EXEMPTION FROM, THE REQUIREMENTS OF SUCH ACT OR SUCH LAWS.

          9. Fees and  Expenses.  The Company  shall at the Closing pay the fees
and  expenses of  Purchaser's  counsel.  In  addition,  the Company  will at the
Closing pay Ayeh Trading Inc.  $20,000 to cover its due diligence  investigation
of the Company on behalf of the Purchaser provided that the Closing occurs on or
before February 28, 1999 or would have occurred on or prior to that date but for
the Company's inability to close as of such date.


<PAGE>


          10. Survival of the Representations,  Warranties,  etc. The respective
agreements,  representations,  warranties, indemnities and other statements made
by or on behalf of the Company and the Purchaser, respectively, pursuant to this
Agreement,   shall  remain  in  full  force  and  effect,   regardless   of  any
investigation  made by or on behalf of the other party to this  Agreement or any
officer,  director or employee of, or person controlling or under common control
with,  such party and will  survive  delivery of any  payment for the  Purchased
Shares.

          11. Notices. All notices,  requests and other communications hereunder
must be in writing and  delivered to the parties at the  following  addresses or
facsimile numbers:

         If to the Purchaser, to:   Resonance Limited
                                    Burleigh Manor
                                    Peel Road
                                    British Isles
                                    Isle of Man

         With a copy to:            Morse, Zelnick, Rose & Lander, LLP
                                    450 Park Avenue
                                    New York, New York 10022
                                    Attention:  Howard L. Weinreich
         Telecopy:                  (212) 838-9190

         If to the Company, to:     Medical Dynamics, Inc.
                                    99 Inverness Drive East
                                    Englewood, Colorado 80112
                                    Attention:  President
         Telecopy:                  (303) 799-1378

         With a copy to:            Norton Lidstone, LLC
                                    5445 DTC Parkway, Suite 850
                                    Englewood, Colorado 80111
                                    Attention:  Herrick K. Lidstone, Jr., Esq.
         Telecopy:                  (303) 221-5553

All such  notices,  requests  and  other  communications  will (i) if  delivered
personally  to the  address as provided in this  Section,  be deemed  given upon
delivery, (ii) if delivered by facsimile transmission to the facsimile number as
provided in this Section,  be deemed given upon receipt,  and (iii) if delivered
by mail in the  manner  described  above  to the  address  as  provided  in this
Section,  be deemed given upon receipt (in each case  regardless of whether such
notice, request or other communication is received by any other Person to whom a
copy of such notice is to be delivered pursuant to this Section). Any party from
time to time may change its address,  facsimile number or other  information for
the purpose of notices to that party by giving notice  specifying such change to
the other parties hereto.

          12. Miscellaneous.


<PAGE>


               (a) This  Agreement  may be executed in one or more  counterparts
and it is not  necessary  that  signatures  of all  parties  appear  on the same
counterpart,  but such  counterparts  together shall  constitute but one and the
same agreement.  This Agreement,  once executed by a party,  may be delivered to
the other party by facsimile  transmission  of a copy of this Agreement  bearing
the signature of the party so delivering this Agreement.

               (b) This  Agreement  shall inure to the benefit of and be binding
upon the parties hereto, their respective successors and permitted assigns.

               (c) This  agreement  shall  be  governed  by,  and  construed  in
accordance  with,  the laws of the State of Colorado  (without  giving effect to
conflicts of laws  principles).  Subject to applicable  law, the Company  agrees
that final judgment against it in any legal action or proceeding  arising out of
or relating to this  Agreement or the  Registration  Rights  Agreement  shall be
conclusive and may be enforced in any other  jurisdiction  within or outside the
United States by suit on the judgment,  a certified copy of which judgment shall
be conclusive  evidence thereof and the amount of its  indebtedness,  or by such
other means provided by law.

               (d) The  headings  of the  sections  of this  document  have been
inserted for  convenience of reference only and shall not be deemed to be a part
of this Agreement.

               (e) The provisions of this  Agreement are  severable,  and if any
clause or provision shall be held invalid,  illegal or unenforceable in whole or
in part in any  jurisdiction,  then such  invalidity or  unenforceability  shall
affect in that jurisdiction only such clause or provision,  or part thereof, and
shall  not  in  any  manner  affect  such  clause  or  provision  in  any  other
jurisdiction  or  any  other  clause  or  provision  of  this  Agreement  in any
jurisdiction.

               (f) This Agreement,  including the schedules and exhibits hereto,
constitutes  the sole and entire  agreement  of the parties  with respect to the
subject matter hereof.

          13. Time of Essence. Time shall be of the essence in this Agreement.
                     
<PAGE>


         IN WITNESS WHEREOF, this Agreement has been duly executed and delivered
by the duly  authorized  officer(s)  of each  party  hereto as of the date first
above written.

                                            RESONANCE LIMITED


                                            By:  _________________________


                                            MEDICAL DYNAMICS, INC.


                                            By:  _________________________




                                    EXHIBIT A

     THIS WARRANT HAS NOT BEEN  REGISTERED  UNDER THE SECURITIES ACT OF 1933, AS
AMENDED,  AND MAY NOT BE  SOLD,  TRANSFERRED,  PLEDGED  OR  HYPOTHECATED  IN THE
ABSENCE OF A REGISTRATION  STATEMENT  COVERING THIS WARRANT UNDER SAID ACT OR AN
EXEMPTION FROM REGISTRATION UNDER SAID ACT.

                             MEDICAL DYNAMICS, INC.

                      WARRANT TO PURCHASE 523,834 SHARES OF
                     COMMON STOCK, PAR VALUE $.001 PER SHARE


     This  is  to  certify  that,   for  VALUE   RECEIVED,   RESONANCE   LIMITED
("Warrantholder"),  is entitled to purchase,  subject to the  provisions of this
Warrant, from MEDICAL DYNAMICS,  INC., a Colorado corporation  ("Company"),  and
pursuant  to  a  Purchase   Agreement   by  and  between  the  Company  and  the
Warrantholder  dated as of March  17,  1999  (the  "Purchase  Agreement")  up to
523,834  shares of the  Company's  Shares of Common  Stock,  par value $.001 per
share (the "Shares"),  at any time not later than 5:00 P.M.,  Mountain time, [on
September 16, 1999 or upon the expiration of twelve months from the Registration
Date,  whichever is later (the  "Expiration  Date")],  at an exercise  price per
share equal to [the purchase price of each Purchased  Share as determined  under
Section 1(a) of the Purchase  Agreement (the "Warrant Price").  Unless otherwise
defined herein  capitalized terms shall have the meaning ascribed to them in the
Purchase  Agreement.  The number of Shares  purchasable  upon  exercise  of this
Warrant  (the  "Warrant  Shares")  and the  Warrant  Price  shall be  subject to
adjustment from time to time as described herein.

     Section 1. Registration.  The Company shall maintain books for the transfer
and registration of the Warrant.  Upon the initial issuance of the Warrant,  the
Company shall issue and register the Warrant in the name of the Warrantholder.

     Section 2. Transfers.  As provided  herein,  the Warrant may be transferred
only pursuant to a  registration  statement  filed under the  Securities  Act of
1933,  as  amended   ("Securities   Act")  or  an  exemption  from  registration
thereunder.  Subject to such restrictions,  the Company shall transfer from time
to time,  the Warrant,  upon the books to be  maintained by the Company for that
purpose, upon surrender thereof for transfer properly endorsed or accompanied by
appropriate  instructions for transfer upon any such transfer, and a new Warrant
shall be issued to the transferee and the surrendered  Warrant shall be canceled
by the Company. The Warrant Shares will be registered on a Form S-3 or successor
form which the Company  has agreed to file  pursuant  to a  Registration  Rights
Agreement.

     Section 3.  Exercise  of Warrant.  Subject to the  provisions  hereof,  the
Warrantholder  may  exercise  the  Warrant  in whole or in part at any time upon
surrender of the Warrant, together with delivery  of the duly  executed  Warrant


<PAGE>



exercise form attached hereto (the "Exercise Agreement"),  to the Company during
normal business hours on any business day at the Company's  principal  executive
offices (or such other  office or agency of the Company as it may  designate  by
notice to the  holder  hereof),  and upon  payment to the  Company  in cash,  by
certified  or  official  bank check or by wire  transfer  for the account of the
Company of the Warrant  Price for the Warrant  Shares  specified in the Exercise
Agreement.  The Warrant Shares so purchased  shall be deemed to be issued to the
holder hereof or such holder's designee,  as the record owner of such shares, as
of the close of  business  on the date on which  this  Warrant  shall  have been
surrendered (or evidence of loss, theft or destruction  thereof),  the completed
Exercise  Agreement shall have been delivered,  and payment shall have been made
for such  shares as set forth  above.  Certificates  for the  Warrant  Shares so
purchased, representing the aggregate number of shares specified in the Exercise
Agreement, shall be delivered to the holder hereof within a reasonable time, not
exceeding  two  (2)  business  days,  after  this  Warrant  shall  have  been so
exercised.  The certificates so delivered shall be in such  denominations as may
be requested by the holder  hereof and shall be  registered  in the name of such
holder or such other name as shall be designated by such holder. If this Warrant
shall have been exercised only in part,  then,  unless this Warrant has expired,
the Company shall, at its expense, at the time of delivery of such certificates,
deliver  to the holder a new  Warrant  representing  the  number of shares  with
respect to which this Warrant shall not then have been exercised.

     To the extent that any Warrant remain  outstanding  at 5:01 P.M.,  Mountain
time on the Expiration Date, such outstanding Warrant Shares shall automatically
expire and be of no further force and effect, and the holders thereof shall have
no further right to exercise or transfer the same.

     Section 4. Compliance with the Securities Act of 1933. Neither this Warrant
nor the Shares  issued upon  exercise  hereof nor any other  security  issued or
issuable upon exercise of this Warrant may be offered or sold except as provided
in this agreement and in conformity with the Securities Act of 1933, as amended,
and if not  sold in a  registered  offering  then  only  against  receipt  of an
agreement  of such  person to whom such offer of sale is made to comply with the
provisions of this Section 4 with respect to any resale or other  disposition of
such  security.  The Company may cause the legend set forth on the first page of
this Warrant to be set forth on each  Warrant or similar  legend on any security
issued or issuable upon exercise of this Warrant, unless counsel for the Company
is of the opinion as to any such security that such legend is unnecessary.

     Section 5.  Payment of Taxes.  The Company will pay any  documentary  stamp
taxes  attributable to the initial  issuance of Warrant Shares issuable upon the
exercise  of the  Warrant;  provided,  however,  that the  Company  shall not be
required to pay any tax or taxes which may be payable in respect of any transfer
involved in the issue or delivery of any  certificates  for Warrant  Shares in a
name other than that of the registered holder of the Warrant in respect of which
such shares are issued,  and in such case,  the Company shall not be required to
issue or deliver any  certificate  for Warrant  Shares or any Warrant  until the
person requesting the same has paid to the Company the amount of such tax or has
established  to the  Company's  satisfaction  that such tax has been  paid.  The
holder shall be responsible  for income taxes due under federal or state law, if
any such tax is due.


<PAGE>



     Section 6.  Mutilated  or Missing  Warrants.  In case the Warrant  shall be
mutilated,  lost, stolen, or destroyed,  the Company shall issue in exchange and
substitution of and upon  cancellation of the mutilated  Warrant,  or in lieu of
and  substitution  for the Warrant lost,  stolen or destroyed,  a new Warrant of
like tenor and for the  purchase  of a like number of Warrant  Shares,  but only
upon receipt of evidence  reasonably  satisfactory  to the Company of such loss,
theft or  destruction  of the  Warrant,  and with  respect to a lost,  stolen or
destroyed Warrant, reasonable indemnity or bond, if requested by the Company.

     Section 7.  Reservation  of  Shares.  The  Company  hereby  represents  and
warrants that there have been reserved,  and the Company shall at all applicable
times keep  reserved,  out of the authorized  and unissued  Shares,  a number of
shares  sufficient  to  provide  for the  exercise  of the  rights  of  purchase
represented by the Warrant,  and the Continental Stock Transfer & Trust Company,
the  transfer  agent for the Shares  ("Transfer  Agent"),  and every  subsequent
transfer  agent for the Shares or other shares of the  Company's  capital  stock
issuable  upon the exercise of any of the right of purchase  aforesaid  shall be
irrevocably  authorized  and  directed  at all times to reserve  such  number of
authorized  and unissued  Shares as shall be  requisite  for such  purpose.  The
Company agrees that all Warrant Shares issued upon exercise of the Warrant shall
be, at the time of delivery of the  certificates  for such Warrant Shares,  duly
authorized, validly issued, fully paid and non-assessable Shares of the Company.
The Company will keep a conformed copy of this Warrant on file with the Transfer
Agent and with every subsequent transfer agent for the Shares or other shares of
the Company's capital stock issuable upon the exercise of the rights of purchase
represented  by the  Warrant.  The  Company  will  supply  from time to time the
Transfer  Agent with duly  executed  stock  certificates  required  to honor the
outstanding Warrant.

     Section 8. Warrant  Price.  The Warrant  Price,  subject to  adjustment  as
provided in Section 9, shall be payable in lawful money of the United  States of
America.

     Section 9.  Adjustments.  Subject and  pursuant to the  provisions  of this
Section  9, the  Warrant  Price and  number of  Warrant  Shares  subject to this
Warrant  shall  be  subject  to  adjustment  from  time  to  time  as set  forth
hereinafter.

          (a) If the  Company  shall at any time or from time to time  while the
Warrant is  outstanding,  pay a dividend or make a distribution on its Shares in
Shares,  subdivide  its  outstanding  Shares into a greater  number of Shares or
combine  its  outstanding  Shares  into a  smaller  number of Shares or issue by
reclassification  of its  outstanding  Shares  any Shares of its  capital  stock
(including  any such  reclassification  in connection  with a  consolidation  or
merger in which the Company is the continuing  corporation),  then the number of
Warrant Shares purchasable upon exercise of the Warrant and the Warrant Price in
effect  immediately  prior to the date  upon  which  such  change  shall  become
effective, shall be adjusted by the Company so that the Warrantholder thereafter
exercising  the  Warrant  shall be  entitled  to receive the number of Shares or
other capital stock which the  Warrantholder  would have received if the Warrant
had been exercised  immediately  prior to such event.  Such adjustment  shall be
made successively whenever any event listed above shall occur.



<PAGE>



          (b) If any  capital  reorganization,  reclassification  of the capital
stock of the  Company,  consolidation  or merger  of the  Company  with  another
corporation,  or sale, transfer or other disposition of all or substantially all
of the Company's properties to another corporation shall be effected, then, as a
condition of such reorganization, reclassification, consolidation, merger, sale,
transfer  or other  disposition,  lawful and  adequate  provision  shall be made
whereby  each  Warrantholder  shall  thereafter  have the right to purchase  and
receive upon the basis and upon the terms and conditions herein specified and in
lieu of the Warrant Shares immediately theretofore issuable upon exercise of the
Warrant,  such shares of stock,  securities  or properties as may be issuable or
payable  with  respect to or in  exchange  for a number of  outstanding  Warrant
Shares equal to the number of Warrant Shares  immediately  theretofore  issuable
upon  exercise  of  the  Warrant,  had  such  reorganization,  reclassification,
consolidation,  merger, sale, transfer or other disposition not taken place, and
in any such case appropriate  provision shall be made with respect to the rights
and  interests  of each  Warrantholder  to the end  that the  provisions  hereof
(including, without limitations,  provision for adjustment of the Warrant Price)
shall  thereafter be applicable,  as nearly  equivalent as may be practicable in
relation to any shares of stock, securities or properties thereafter deliverable
upon the exercise thereof.  The Company shall not effect any such consolidation,
merger,  sale,  transfer or other disposition  unless prior to or simultaneously
with the  consummation  thereof  the  successor  corporation  (if other than the
Company)  resulting  from  such  consolidation  or  merger,  or the  corporation
purchasing or otherwise  acquiring such assets or other appropriate  corporation
or entity shall  assume,  by written  instrument  executed and  delivered to the
Company,  the  obligation to deliver to the holder of the Warrant such shares of
stock,  securities  or assets as, in accordance  with the foregoing  provisions,
such holder may be entitled to  purchase  and the other  obligations  under this
Warrant.

          The above  provisions of this paragraph (b) shall  similarly  apply to
successive reorganizations,  reclassifications,  consolidations, mergers, sales,
transfers or other dispositions.

          (c) In case the  Company  shall fix a record  date for the making of a
distribution to all holders of Shares  (including any such  distribution made in
connection with a consolidation or merger in which the Company is the continuing
corporation)  of evidences of  indebtedness or assets (other than cash dividends
or cash distributions  payable out of consolidated earnings or earned surplus or
dividends or distributions  referred to in Section 9(a)), or subscription rights
or warrants,  the Warrant  Price to be in effect after such record date shall be
determined by multiplying the Warrant Price in effect  immediately prior to such
record date by a fraction,  the  numerator of which shall be the total number of
Shares outstanding  multiplied by the Market Price per Share (as defined below),
less the fair market value (as determined by the Company's Board of Directors in
good faith) of said assets or evidences of indebtedness  so  distributed,  or of
such subscription rights or warrants,  and the denominator of which shall be the
total number of Shares  outstanding  multiplied by such current Market Price per
Share.  For  purposes  herein the Market  Price of a Share  shall be the closing
price of the Shares on the trading day immediately  preceding the date for which
the Market Price is to be determined. Such adjustment shall be made successively
whenever such a record date is fixed.



<PAGE>



          (d) An adjustment shall become effective  immediately after the record
date in the case of each  dividend or  distribution  and  immediately  after the
effective date of each other event which requires an adjustment.

          (e) In the event that, as a result of an  adjustment  made pursuant to
Section  9(a),  the holder of the Warrant  shall become  entitled to receive any
shares of capital  stock of the Company  other than  Shares,  the number of such
other  shares so  receivable  upon  exercise  of the  Warrant  shall be  subject
thereafter  to  adjustment  from time to time in a manner and on terms as nearly
equivalent as practicable  to the provisions  with respect to the Warrant Shares
contained in this Warrant.

          (f)  Shares  owned by or held for the  account  of the  Company or any
majority-owned subsidiary shall not be deemed outstanding for the purpose of any
computation under this Agreement.

     Section 10. Fractional Interest. The Company shall not be required to issue
fractions of Warrant Shares upon the exercise of the Warrant. If any fraction of
a Warrant Share would,  except for the  provisions of this Section,  be issuable
upon the exercise of the Warrant (or specified  portions  thereof),  the Company
shall  purchase such fraction for an amount in cash equal to the current  market
value of such fraction based upon the current Market Price (determined  pursuant
to Section  9(c)) of a Warrant  Share.  All  calculations  under this Section 10
shall be made to the nearest cent or to the nearest one-hundredth of a share, as
the case may be.

     Section 11.  Benefits.  Nothing in this Warrant  shall be construed to give
any person,  firm or corporation  (other than the Company and the Warrantholder)
any legal or equitable right, remedy or claim, it being agreed that this Warrant
shall  be  for  the  sole  and   exclusive   benefit  of  the  Company  and  the
Warrantholder.

     Section  12.  Notices to  Warrantholder.  Upon the  happening  of any event
requiring an adjustment of the Warrant Price,  the Company shall  forthwith give
written  notice  thereof to the  Warrantholder  at the address  appearing in the
records of the  Company,  stating the  adjusted  Warrant  Price and the adjusted
number of  Warrant  Shares  resulting  from  such  event  and  setting  forth in
reasonable  detail  the  method of  calculation  and the facts  upon  which such
calculation is based.  The  certificate of the Company's  independent  certified
public  accountants  shall be  conclusive  evidence  of the  correctness  of any
computation  made,  absent  manifest  error.  Failure to give such notice to the
Warrantholder or any defect therein shall not affect the legality or validity of
the subject adjustment.

     Section 13.  Redemption.  The  Company may redeem the Warrant  upon 15 days
advance  notice  at a price  of $2.50  per each  Warrant  Share  covered  by the
Warrant.  The Company  shall  exercise its right of  redemption by notice to the
Warrantholder  which  notice  shall  specify a closing not less than 15 days nor
more than 30 days from the issuance of such  notice.  At the Closing the Warrant
unless  exercised shall be surrendered for the redemption  price payable in cash
or by certified check.



<PAGE>



     Section 14. Identity of Transfer  Agent.  The Transfer Agent for the Shares
is Continental  Stock Transfer & Trust Company,  2 Broadway,  New York, New York
10004.  Forthwith upon the appointment of any subsequent  transfer agent for the
Shares or other shares of the Company's capital stock issuable upon the exercise
of the rights of purchase  represented by the Warrant,  the Company will mail to
the  Warrantholder  a  statement  setting  forth  the name and  address  of such
transfer agent.

     Section 15. Notices.  Any notice pursuant hereto to be given or made by the
Warrantholder  to or on the Company shall be sufficiently  given or made if sent
by certified  mail,  return receipt  requested,  postage  prepaid,  addressed as
follows:

                  Medical Dynamics, Inc.
                  99 Inverness Drive East
                  Englewood, CO 80112
                  Attn: Van A. Horsley
                  Telephone: 303/790-2990
                  Facsimile: 303/799-1378

or such other  address as the  Company  may  specify in writing by notice to the
Warrantholder complying as to delivery with the terms of this Section 15.

     Any notice  pursuant hereto to be given or made by the Company to or on the
Warrantholder  shall be  sufficiently  given or made if sent by certified  mail,
return receipt requested, postage prepaid, to the address set forth on the books
of the  Company or, as to each of the  Company  and the  Warrantholder,  at such
other  address as shall be  designated  by such  party by written  notice to the
other party complying as to delivery with the terms of this Section 15. All such
notices,  requests,  demands,  directions and other  communications  shall, when
mailed be effective when deposited in the mails addressed as aforesaid.

     Section 16.  Registration  Rights.  The initial  holder of this  Warrant is
entitled to the benefit of certain registration rights in respect of the Warrant
Shares as provided in the  Registration  Rights  Agreement dated as of March 17,
1999.

     Section 17.  Successors.  All the covenants and provisions hereof by or for
the  benefit  of the  Investor  shall  bind  and  inure  to the  benefit  of its
respective successors and assigns hereunder.

     Section 18.  Governing  Law.  This Warrant shall be deemed to be a contract
made  under  the laws of the State of  Colorado  and for all  purposes  shall be
construed in accordance with the laws of said State.

     IN WITNESS WHEREOF,  the parties hereto have caused this Warrant to be duly
executed, as of the day and year first above written.

                                            MEDICAL DYNAMICS, INC.




                                            By: ________________________________
                                                Name:
                                                Title:


Attest:


<PAGE>




                             MEDICAL DYNAMICS, INC.
                             WARRANT EXERCISE FORM



MEDICAL DYNAMICS, INC.
99 Iverness Drive East
Englewood, CO 80112


     This  undersigned  hereby  irrevocably  elects  to  exercise  the  right of
purchase  represented  by the within  Warrant  ("Warrant")  for, and to purchase
thereunder by (CHECK AS  APPLICABLE) [] payment by cash or certified  check;  []
conversion  of the within  Warrant by surrender  of the Warrant,  ______________
shares of Shares*  ("Warrant  Shares")  provided for therein,  and requests that
certificates for the Warrant Shares be issued as follows:


                  Name


                  Address



                  Federal Tax Identification No.
                  or Social Security No.


and,  if the  number  of  Warrant  Shares  shall not be all the  Warrant  Shares
purchasable upon exercise of the Warrant,  that a new Warrant for the balance of
the Warrant Shares purchasable upon exercise of the Warrant be registered in







 * NOTE:  If  conversion  of the Warrant is made by surrender of the Warrant and
          the number of shares indicated exceeds the maximum number of shares to
          which a holder is entitled, the Company will issue such maximum number
          of shares.


<PAGE>


the name of the undersigned Warrantholder or the undersigned's Assignee as below
indicated and delivered to the address stated below.

Dated:

                                    Signature:


          Name (please print)


          Address


          Federal Identification or Social Security No.

 Note:    The above  signature must  correspond  with the name of the registered
          holder  as  written  on  the  first  page  of  the  Warrant  in  every
          particular,  without alteration or enlargement or any change whatever,
          unless the Warrant has been assigned.






                                    EXHIBIT B

                             MEDICAL DYNAMICS, INC.

                          REGISTRATION RIGHTS AGREEMENT


     THIS REGISTRATION RIGHTS AGREEMENT (the "Agreement") is made and entered as
of this  17th day of  March,  1999 by and  between  MEDICAL  DYNAMICS,  INC.,  a
Colorado  corporation  (the  "Company") and RESONANCE  LIMITED (the  "Investor")
pursuant to Section 7(b) of the Purchase  Agreement  dated March 17, 1999 by and
between the Company and the  Investor  (the  "Purchase  Agreement").  Unless the
context otherwise requires capitalized terms shall have the meanings ascribed to
them in the Purchase Agreement.

     The parties hereby agree as follows:

     1. Certain Definitions

     As used in this  Agreement,  the  following  terms shall have the following
meanings:

     "Common Stock" shall mean the Common Stock,  par value $.001 per share,  of
the Company.

     "Prospectus"  shall  mean  the  prospectus  included  in  any  Registration
Statement,  as amended or supplemented by any prospectus supplement with respect
to the  terms of the  offering  of any  portion  of the  Registrable  Securities
covered  by  such  Registration  Statement  and  by  all  other  amendments  and
supplements  to the  prospectus,  including,  post-effective  amendments and all
material incorporated by reference in such prospectus.

     "Register," "registered" and "registration" refer to a registration made by
preparing and filing a registration  statement or similar document in compliance
with the  1933 Act (as  defined  below),  and the  declaration  or  ordering  of
effectiveness of such registration statement or document.

     "Registrable  Securities"  shall mean the Common  Stock  issued or issuable
under the Purchase  Agreement or under the Warrants  issuable under the Purchase
Agreement.

     "Registration  Statement"  shall  mean any  registration  statement  of the
Company  that  covers  any  of'  the  Registrable  Securities  pursuant  to  the
provisions  of  this  Agreement,   including  the  Prospectus,   amendments  and
supplements to such Registration Statement, including post-effective amendments,
all  exhibits and all material  incorporated  by reference in such  Registration
Statement.

     "SEC" means the U.S. Securities and Exchange Commission.

<PAGE>



     "1933 Act" means the Securities Act of 1933, as amended,  and the rules and
regulations promulgated thereunder.

     "1934 Act" means the Securities  Exchange Act of 1934, as amended,  and the
rules and regulations promulgated thereunder.

     "Warrant"  means the Warrant to purchase  shares of Common  Stock issued to
the Investor pursuant to the Purchase Agreement.

     2. Registration

     (a)  Registration   Statement.   Promptly  following  the  closing  of  the
transactions contemplated by the Purchase Agreement (the "Closing Date") (but no
later than thirty days after the Effective  Date), the Company shall prepare and
file with the SEC a  registration  statement on Form S-3 (or, if Form S-3 is not
then available to the Company, on such form of registration statement as is then
available to effect such a registration of the Registrable  Securities,  subject
to the Investor's  consent)  covering the resale of the Registrable  Securities.
Such Registration  Statement, to the extent allowable under the 1933 Act and the
Rules  promulgated  thereunder  (including  rule  416),  shall  state  that such
Registration  Statement  also covers  such  indeterminate  number of  additional
shares of Common Stock as may become issuable upon conversion of the Warrants to
prevent  dilution  resulting  from  stock  splits,  stock  dividends  or similar
transactions  or by reason of changes in the  Exercise  Price of the Warrants in
accordance  with  the  terms  thereof.  The  Registration  Statement  (and  each
amendment  or  supplement   thereto,   and  each  request  for  acceleration  of
effectiveness thereof) shall be provided to (and subject to the approval of) the
Investor and its counsel prior to its filing or other  submission.  In the event
that  Additional  Shares or Warrant  Shares are not able to be  included  in the
Registration  Statement to be filed as provided above, they shall be included in
a second  Registration  Statement  covering  such shares which the Company shall
file and cause to  become  effective  as soon as  possible  after the  number of
Additional Shares and Warrant Shares has been determined.

     (b)  Expenses.  The  Company  will  pay all  expenses  associated  with the
registration,  excluding discounts,  commissions, fees of underwriters,  selling
brokers,  dealer managers or similar securities industry  professionals relating
to the distribution of the Registrable Securities.

     (c) Effectiveness.

          The Company shall use its best efforts to obtain the  effectiveness of
the  Registration  Statement  as soon as  practicable.  If (A) the  Registration
Statement is not declared  effective  by the SEC within 135 days  following  the
date hereof (the "Registration Date"), (B) after the Registration  Statement has
been  declared  effective  by the SEC,  sales  cannot  be made  pursuant  to the
Registration  Statement (by reason of a stop order, or the Company's  failure to
update the  Registration  Statement),  or (C) the Common  Stock is not listed or
included for quotation on the Nasdaq SmallCap Market System, The Nasdaq National
Market System, the New York Stock Exchange, or the American Stock Exchange, then
the Company will make payments to the Investor, as liquidated damages and not as
a  penalty,  in an amount  equal to $15,000  for each  month or portion  thereof
following the  Registration  Date during which the registration is not effective
(referred  to  herein  as the  "Blackout  Period")  (which  remedy  shall not be



<PAGE>


exclusive  of any other  remedies  available  at law or in equity).  The Company
shall bear all  reasonable  fees or costs  incurred  by the  Investor  for legal
counsel  as a result  of the  filing  of any  post-effective  amendments  to the
Registration  Statement.  The amounts payable as liquidated  damages pursuant to
this paragraph shall be payable in lawful money of the United States on the last
day of each month during the Blackout Period. In addition to the foregoing,  the
Company  shall pay as additional  liquidated  damages an amount equal to 2% or a
pro rata  portion  thereof  of the  Purchase  Price for each 30 days or  portion
thereof  subsequent  to the  expiration of 30 days from the Closing and prior to
the Blackout  Period that the  Registration  Statement has not been unfiled with
the SEC.

     3. Company Obligations. The Company will use its best efforts to effect the
registration and the resale of the Registrable Securities in accordance with the
intended method of disposition  thereof,  and pursuant thereto the Company will,
as expeditiously as possible:

     (a) use its reasonable best efforts to cause such Registration Statement to
become  effective and to remain  continuously  effective for a period which will
terminate  when  all  Registrable   Securities   covered  by  such  Registration
Statement, as amended from time to time, have been sold;

     (b)  prepare  and  file  with the SEC such  amendments  and  post-effective
amendments to the Registration  Statement and the Prospectus as may be necessary
to keep the Registration Statement effective for the period specified in Section
3(a) and to  comply  with the  provisions  of the 1933 Act and the 1934 Act with
respect to the distribution of all Registrable  Securities;  provided that, at a
time reasonably  prior to the filing of a Registration  Statement or Prospectus,
or any  amendments  or  supplements  thereto,  the Company  will  furnish to the
Investor copies of all documents  proposed to be filed,  which documents will be
subject to the comments of the Investor and its counsel;

     (c) permit a single firm of counsel designated by the Investor to review at
Investor's expense the Registration Statement and all amendments and supplements
thereto a reasonable  period of time prior to their filing with the SEC, and not
file any document in a form to which such counsel reasonably objects;

     (d) furnish to the  Investor and its legal  counsel (i) promptly  after the
same is prepared  and publicly  distributed,  filed with the SEC, or received by
the Company,  one copy of the Registration  Statement and any amendment thereto,
each  preliminary  prospectus  and  Prospectus  and each amendment or supplement
thereto,  and each  letter  written by or on behalf of the Company to the SEC or
the staff of the SEC, and each item of correspondence  from the SEC or the staff
of the SEC, in each case relating to such Registration Statement (other than any
portion of any  thereof  which  contains  information  for which the Company has
sought confidential treatment),  and (ii) such number of copies of a Prospectus,
including a preliminary  prospectus,  and all amendments and supplements thereto
and such other  documents as such  Investor may  reasonably  request in order to
facilitate the disposition of the Registrable Securities owned by such Investor;

     (e) in the event the Investor  selects  underwriters for the offering which
underwriters  shall be reasonably  acceptable to the Company,  the Company shall
enter into and perform its obligations under an underwriting agreement, in usual
and customary form, including, without limitation, customary indemnification and
contribution obligations, with the underwriters of such offering;


<PAGE>



     (f) at the request of the Investor,  the Company shall furnish, on the date
that Registrable Securities are delivered to an underwriter, if any, for sale in
connection with the Registration  Statement or, if such securities are not being
sold by an  underwriter,  on the date of  effectiveness  thereof (i) an opinion,
dated as of such date,  from  counsel  representing  the Company for purposes of
such  Registration  Statement,  in form,  scope and substance as is  customarily
given in an underwritten public offering,  addressed to the underwriter, if any,
and the  Investor  and (ii) a  letter,  dated  such  date,  from  the  Company's
independent certified public accountants in form and substance as is customarily
given  by  independent:  certified  public  accountants  to  underwriters  in an
underwritten  public offering,  addressed to the  underwriters,  if any, and the
Investors;

     (g) make  reasonable  effort to prevent  the  issuance of any stop order or
other  suspension  of  effectiveness  and,  if such order is issued,  obtain the
withdrawal of any such order at the earliest possible moment;

     (h)  furnish  to the  Investor  at least  five  copies of the  Registration
Statement  and  any  post-effective   amendment  thereto,   including  financial
statements and schedules,  all documents  incorporated  therein by reference and
all exhibits (including those incorporated by reference);

     (i) deliver to the  Investor as many  copies of the  Prospectus  (including
each  preliminary  prospectus)and  any  amendment or  supplement  thereto as the
Investor may reasonably  request in order to facilitate  the  disposition of the
Registrable Securities;

     (j)  prior  to any  public  offering  of  Registrable  Securities,  use its
reasonable  best efforts to register or qualify or  cooperate  with the Investor
and its counsel in connection  with the  registration or  qualification  of such
Registrable  Securities for offer and sale under the securities or blue sky laws
of such jurisdictions as the Investor  reasonably requests in writing and do any
and all other  reasonable  acts or things  necessary  or advisable to enable the
distribution in such jurisdictions of the Registrable  Securities covered by the
Registration  Statement;  provided  that the  Company  will not be  required  to
qualify  generally  to do business in any  jurisdiction  where it is not then so
qualified  or to take any action  which would  subject it to general  service of
process in any such jurisdiction where it is not then so subject;

     (k) cause all Registrable  Securities covered by the Registration Statement
to be listed on each securities exchange,  interdealer quotation system or other
market on which similar securities issued by the Company are then listed;

     (1) immediately notify the Investor at any time when a Prospectus  relating
thereto is required to be delivered  under the  Securities  Act, upon  discovery
that,  or upon the happening of any event as a result of which,  the  Prospectus
included in such Registration  Statement,  as then in effect, includes an untrue
statement of a material  fact or omits to state any material fact required to be
stated therein or necessary to make the statements therein not misleading in the
light of the circumstances then existing, and at the request of any such holder,
promptly  prepare and furnish to such holder a reasonable  number of copies of a
supplement to or an amendment of such Prospectus as may be necessary so that, as

<PAGE>


thereafter  delivered to the  purchasers of such  Registrable  Securities,  such
Prospectus  shall not include an untrue  statement of a material fact or omit to
state a material  fact  required to be stated  therein or  necessary to make the
statements  therein  not  misleading  in the  light  of the  circumstances  then
existing; and

     (m) otherwise use its best efforts to comply with all applicable  rules and
regulations  of the SEC  under the 1933 Act and the 1934  Act,  take such  other
actions as may be reasonably  necessary to facilitate  the  registration  or the
disposition of the Registrable  Securities hereunder;  and make available to its
security  holders,  as soon as  reasonably  practicable,  but not later than the
Availability Date (as defined below), an earnings statement covering a period of
at least twelve  months,  beginning  after the effective  date of the applicable
Registration Statement, which earnings statement shall satisfy the provisions of
subsection  1 l(a) of the 1933 Act (for the  purpose  of this  subsection  3(m),
"Availability  Date" means the 45th day  following  the end of the fourth fiscal
quarter that includes the effective date of such Registration Statement,  except
that, if such fourth fiscal quarter is the last quarter of the Company's  fiscal
year, "Availability Date" means the 90th day after the end of such fourth fiscal
quarter).

     4. Obligations of the Investor

     (a) It shall be a condition  precedent to the obligations of the Company to
complete  the  registration  pursuant  to this  Agreement  with  respect  to the
Registrable  Securities  that the  Investor  shall  furnish to the Company  such
information  regarding  itself,  the  Registrable  Securities held by it and the
intended method of disposition of the Registrable Securities held by it as shall
be reasonably required to effect the registration of such Registrable Securities
and shall execute such  documents in connection  with such  registration  as the
Company may  reasonably  request.  At least three (3) business days prior to the
first anticipated filing date of the Registration  Statement,  the Company shall
notify the Investor of the information the Company requires from the Investor if
the Investor  elects to have any of the Registrable  Securities  included in the
Registration Statement.

     (b) The Investor, by its acceptance of the Registrable  Securities,  agrees
to  cooperate  with the  Company  as  reasonably  requested  by the  Company  in
connection  with  the  preparation  and  filing  of the  Registration  Statement
hereunder,  unless  the  Investor  has  notified  the  Company in writing of its
election  to exclude all of the  Registrable  Securities  from the  Registration
Statement.

     (c) In the event the  Investor  determines  to engage  the  services  of an
underwriter, the Investor agrees to enter into and perform its obligations under
an  underwriting  agreement,  in usual and customary  form,  including,  without
limitation,  customary  indemnification and contribution  obligations,  with the
managing  underwriter  of such  offering  and take  such  other  actions  as are
reasonably  required in order to expedite or facilitate the  dispositions of the
Registrable Securities.

     (d) The Investor  agrees that,  upon receipt of any notice from the Company
of the  happening of any event  rendering the  Registration  Statement no longer
effective,  the Investor will immediately discontinue disposition of Registrable
Securities  pursuant to the  Registration  Statement  covering such  Registrable
Securities  until the Investor's  receipt of the copies of the  supplemented  or
amended prospectus filed with the SEC are declared effective and, if so directed
by the Company, the Investor shall deliver to the Company (at the expense of the
Company) or destroy (and deliver to the Company a  certificate  of  destruction)
all  copies  in  the  Investor's  possession  of  the  prospectus  covering  the
Registrable Securities current at the time of receipt of such notice.

<PAGE>


     (e) The  Investor  may not  participate  in any  underwritten  registration
hereunder  unless it (i) agrees to sell the Registrable  Securities on the basis
provided in any  underwriting  arrangements  in usual and customary form entered
into by the Company,  (ii) completes and executes all questionnaires,  powers of
attorney,  indemnities,  underwriting  agreements and other documents reasonably
required under the terms of such underwriting arrangements,  and (iii) agrees to
pay its pro rata share of all  underwriting  discounts and  commissions  and any
expenses in excess of those payable by the Company pursuant to the terms of this
Agreement.

     (f) The  Investor  agrees  that it will treat all  confidential  non-public
information  which it receives  hereunder  in  confidence  and will not use such
information only for the purposes contemplated hereunder.

     5. Indemnification

     (a)  Indemnification  by Company.  The Company agrees to indemnify and hold
harmless,  to the fullest  extent  permitted by law the Investor,  its officers,
directors,  partners  and  employees  and each person who  controls the Investor
(within  the  meaning of the 1933 Act)  against  all  losses,  claims,  damages,
liabilities, costs (including,  without limitation,  reasonable attorney's fees)
and expenses caused by (i) any untrue or alleged untrue  statement of a material
fact  contained in any  Registration  Statement,  Prospectus or any  preliminary
prospectus  or any  amendment or  supplement  thereto or any omission or alleged
omission  to state  therein a material  fact  required  to be stated  therein or
necessary to make the statements  therein not misleading,  except insofar as the
same are based upon any  information  furnished in writing to the Company by the
Investor, expressly for use therein, or (ii) any violation by the Company of any
federal,  state or common law, rule or  regulation  applicable to the Company in
connection  with  any  Registration  Statement,  Prospectus  or any  preliminary
prospectus,  or any amendment or supplement  thereto,  and shall  reimburse,  as
incurred,  each of the  foregoing  persons for any legal and any other  expenses
reasonably  incurred in  connection  with  investigating  or defending  any such
claims. The foregoing is subject to the condition that, insofar as the foregoing
indemnities relate to any untrue statement,  alleged untrue statement,  omission
or alleged  omission made in any preliminary  prospectus or Prospectus  which is
eliminated or remedied in any Prospectus or amendment or supplement thereto, the
above indemnity obligations of the Company shall not inure to the benefit of any
indemnified  party if a copy of such final Prospectus or amendment or supplement
thereto had been made  available to such  indemnified  party and was not sent or
given by such indemnified  party at or prior to the time such action is required
of such indemnified  party by the 1933 Act and if delivery of such Prospectus or
amendment or  supplement  thereto  would have  eliminated  (or been a sufficient
defense  to) any  liability  of such  indemnified  party  with  respect  to such
statement  or omission.  Indemnity  under this Section 5(a) shall remain in full
force and effect  regardless  of any  investigation  made by or on behalf of any
indemnified  party and shall survive the permitted  transfer of the  Registrable
Securities.

     (b) Indemnification by Holder of Registrable Securities. In connection with
any  registration  pursuant to the terms of this  Agreement,  the Investor  will
furnish to the Company in writing  such  information  as the Company  reasonably


<PAGE>


requests  concerning the Investor or the proposed manner of distribution for use
in  connection  with any  Registration  Statement  or  Prospectus  and agrees to
indemnify  and hold  harmless,  to the  fullest  extent  permitted  by law,  the
Company,  its  directors  and  officers and each person who controls the Company
(within  the  meaning of the 1933 Act)  against  any  losses,  claims,  damages,
liabilities and expense  resulting from any untrue  statement of a material fact
or any  omission of a material  fact  required to be stated in the  Registration
Statement  or  Prospectus  or  preliminary  prospectus  or necessary to make the
statements therein not misleading,  to the extent, but only to the extent,  that
such untrue  statement or omission is contained in any information  furnished in
writing by the holder of Registrable  Securities to the Company specifically for
inclusion in such Registration Statement or Prospectus and that such information
was substantially  relied upon by the Company in preparation of the Registration
Statement or Prospectus or any amendment or supplement thereto.

     (c)  Conduct  of  Indemnification   Proceedings.  Any  person  entitled  to
indemnification hereunder shall (i) give prompt notice to the indemnifying party
of any claim with respect to which it seeks indemnification and (ii) permit such
indemnifying  party to assume the defense of such claim with counsel  reasonably
satisfactory  to the  indemnified  party;  provided that any person  entitled to
indemnification hereunder shall have the right to employ separate counsel and to
participate  in the  defense of such  claim,  but the fees and  expenses of such
counsel shall be at the expense of such person unless (a) the indemnifying party
has agreed to pay such fees or  expenses,  or (b) the  indemnifying  party shall
have  failed to assume the defense of such claim and employ  counsel  reasonably
satisfactory  to such  person  or (c) in the  reasonable  judgment  of any  such
person,  based upon written  advice of its  counsel,  a conflict of interest may
exist between such person and the indemnifying party with respect to such claims
(in which case, if the person  notifies the  indemnifying  party in writing that
such person elects to employ separate counsel at the expense of the indemnifying
party, the indemnifying  party shall not have the right to assume the defense of
such claim on behalf of such person); and provided, further, that the failure of
any  indemnified  party to give notice as provided  herein shall not relieve the
indemnifying party of its obligations hereunder,  except to the extent that such
failure to give notice shall materially  adversely affect the indemnifying party
in the  defense  of any such  claim or  litigation.  It is  understood  that the
indemnifying  party shall not, in  connection  with any  proceeding  in the same
jurisdiction,  be liable for fees or expenses of more than one separate  firm of
attorneys  (in addition to local  counsel) at any time for all such  indemnified
parties.  No indemnifying party will, except with the consent of the indemnified
party,  consent to entry of any judgment or enter into any settlement  that does
not  include as an  unconditional  term  thereof  the giving by the  claimant or
plaintiff to such  indemnified  party of a release from all liability in respect
to such claim or litigation.

     (d) Contribution. If for any reason the indemnification provided for in the
preceding  clauses  (a)  and  (b) is  unavailable  to an  indemnified  party  or
insufficient  to hold it harmless,  other than as expressly  specified  therein,
then the  indemnifying  party shall  contribute to the amount paid or payable by
the indemnified  party as a result of such loss,  claim,  damage or liability in
such  proportion  as is  appropriate  to  reflect  the  relative  fault  of  the
indemnified  party and the  indemnifying  party,  as well as any other  relevant
equitable  considerations.  No  person  guilty of  fraudulent  misrepresentation
within  the  meaning  of  Section  11(f) of the 1933 Act  shall be  entitled  to
contribution from any person not guilty of such fraudulent misrepresentation. In
no event shall the contribution obligation of a holder of Registrable Securities
be greater in amount than the dollar amount of the proceeds (net of all expenses
paid by such holder and the amount of any damages such holder has otherwise been
required to pay by reason of such untrue or alleged untrue statement or omission
or alleged omission) received by it upon the sale of the Registrable  Securities
giving rise to such contribution obligation.


<PAGE>


     6. Miscellaneous

     (a) Amendments  and Waivers.  This Agreement may be amended and the Company
may take  any  action  herein  prohibited,  or omit to  perform  any act  herein
required to be  performed  by it, only if the Company  shall have  obtained  the
written consent to such  amendment,  action or omission to act, of the Investor.
Notwithstanding the foregoing, this Agreement. shall automatically be amended in
accordance with the provisions of this Section 6.

     (b) Notices. All notices and other communications provided for or permitted
hereunder shall be made as set forth in the Purchase Agreement.

     (c)  Assignments  and  Transfers by Investor.  This  Agreement  and all the
rights  and  obligations  of the  Investor  hereunder  may  not be  assigned  or
transferred  to any  transferee  or  assignee  except as set forth  herein.  The
Investor may make such  assignment or transfer to any  transferee or assignee of
any Registrable  Securities,  provided, that (i) such transfer is made expressly
subject to this  Agreement and the  transferee  agrees in writing to be bound by
the terms and conditions  hereof,  and (ii) the Company is provided with written
notice of such assignment.

     (d)  Assignments  and Transfers by the Company.  This  Agreement may not be
assigned by the Company  without the prior written  consent of Investor,  except
that without the prior written  consent of the  Investor,  but after notice duly
given,  the Company shall assign its rights and delegate its duties hereunder to
any  successor-in-interest  corporation,  and such  successor-in-interest  shall
assume such rights and duties,  in the event of a merger or consolidation of the
Company  with or into another  corporation,  or any merger or  consolidation  of
another  corporation  with  or  into  the  Company  which  results  directly  or
indirectly  in an aggregate  change in the ownership or control of more than 50%
of the voting rights of the equity securities of the Company, or the sale of all
or substantially all of the Company's assets.

     (e) Benefits of the  Agreement.  The terms and conditions of this Agreement
shall  inure to the  benefit of and be  binding  upon the  respective  permitted
successors  and assigns of the parties.  Nothing in this  Agreement,  express or
implied,  is intended to confer upon any party other than the parties  hereto or
their respective successors and assigns any rights,  remedies,  obligations,  or
liabilities under or by reason of this Agreement,  except as expressly  provided
in this Agreement.

     (f)   Counterparts.   This  Agreement  may  be  executed  in  two  or  more
counterparts,  each of  which  shall be  deemed  an  original,  but all of which
together shall constitute one and the same instrument.

     (g) Titles and  Subtitles.  The titles and subtitles used in this Agreement
are used for  convenience  only and are not to be  considered  in  construing or
interpreting this Agreement.

     (h) Expenses.  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 such party may be entitled.


<PAGE>


     (i)  Severability.  If one or more provisions of this Agreement are held to
be  unenforceable  under  applicable  law, such provision shall be excluded from
this Agreement and the balance of this Agreement shall be interpreted as if such
provision  were so excluded  and shall be  enforceable  in  accordance  with its
terms.

     (j)  Further  Assurances.  The Parties  shall  execute and deliver all such
further  instruments  and  documents  and  take all such  other  actions  as may
reasonably be required to carry out the transactions  contemplated hereby and to
evidence the fulfillment of the agreements herein contained.

     (k) Entire Agreement.  This Agreement is intended by the parties as a final
expression  of their  agreement  and  intended  to be a complete  and  exclusive
statement of the agreement and understanding of the parties hereto in respect of
the  subject  matter  contained  herein.  This  Agreement  supersedes  all prior
agreements and  understandings  between the parties with respect to such subject
matter.

     (1) Applicable  Law. This Agreement  shall be governed by, and construed in
accordance  with, the laws of the State of Colorado without regard to principles
of conflicts of law.

     IN WITNESS WHEREOF, the parties have executed this Agreement as of the date
first written above.

                  The Company:              MEDICAL DYNAMICS, INC.


                                            By:_________________________________
                                               Name:
                                               Title:

                  The Investor:             RESONANCE LIMITED


                                            By:_________________________________
                                               Name:
                                               Title:




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