IMATRON INC
8-K, 1997-08-05
ELECTROMEDICAL & ELECTROTHERAPEUTIC APPARATUS
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                       SECURITIES AND EXCHANGE COMMISSION
                              WASHINGTON, DC 20549




                                    FORM 8-K


                             CURRENT REPORT PURSUANT
                              TO SECTION 13 OF THE
                         SECURITIES EXCHANGE ACT OF 1934



Date of report (Date of earliest event reported)            July 22, 1997
                                                      -----------------------

                                  IMATRON INC.
- ------------------------------------------------------------------------------
             (Exact Name of Registrant as Specified in Its Charter)

                                                    New Jersey
- ------------------------------------------------------------------------------
                 (State or Other Jurisdiction of Incorporation)

        0-12405                                              94-2880078
- ------------------------------              ----------------------------------
(Commission File Number)                  (I.R.S. Employer Identification No.)

            389 Oyster Point Boulevard, South San Francisco, CA 94080
- ------------------------------------------------------------------------------
          (Address of Principal Executive Offices)           (Zip Code)

                                 (415) 583-9964
- ------------------------------------------------------------------------------
              (Registrant's Telephone Number, Including Area Code)


- -----------------------------------------------------------------------------
         (Former Name or Former Address, if Changed Since Last Report)

<PAGE>
ITEM 5.  Development Agreement with TeraRecon Inc.

    On July 22, 1997, the Company and TeraRecon Inc.  entered into a development
agreement  whereby  TeraRecon  will  provide  Imatron  with  a  real-time  image
reconstruction  system  for  use in  conjunction  with  Imatron's  Ultrafast  CT
scanner.  Upon  completion  and when  delivered,  the  RTR-2000  system  will be
exclusive  to  Imatron's  Ultrafast  CT  scanner  and will  expand  its  current
applications  to include new three-  dimensional,  CT flurography or real-time
viewing of computerized tomography (CT) images.

     In   consideration   for  the  successful   development   and  delivery  of
specifically  mandated  RTR-2000  systems,  the  Company  has agreed to issue an
aggregate of 6 million  warrants to purchase the Company's Common Stock at $4.50
per  share.  The  warrants  will be issued in  installments  based on  TeraRecon
achieving  certain  milestones  in  connection  with  the  development  of image
reconstruction systems. In addition,  TeraRecon has agreed to pay the Company an
aggregate  of $2  million  for 4 million  of the  warrants  and to make  royalty
payments to Imatron equal to 3% of Net Sales of certain RTR-2000 systems sold to
third parties.  Upon successful completion of the prototype development program,
the  parties  intend to enter  into a  manufacture  and sale  agreement  whereby
Imatron will have the exclusive  right to sell or lease the RTR-2000  systems to
purchasers of Imatron's Ultrafast CT scanner. TeraRecon will retain the right to
sell,  lease or license the RTR-2000  system to other  medical  imaging  systems
customers  provided  that such  systems do not include  any Imatron  technology.
Neither party to the agreement has granted a license of any of its technology to
the  other.  The term of the  agreement  continues  until the final  development
milestone is completed and accepted and the RTR-2000 system is accepted by 
Imatron and the Imatron warrants are delivered.

ITEM 7.  Exhibits.

     7.1 TeraRecon  Systems  Development and Porting  Agreement  between Imatron
Inc. and TeraRecon  Inc.  dated as of July 22, 1997. 7.2 Press release issued in
connection  with the signing of the TeraRecon  Systems  Development  and Porting
Agreement.

                                   SIGNATURES

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

                                       IMATRON INC.
                                     ----------------------------------------

Date: July 31, 1997                  By:/s/ Gary H. Brooks
                                     ----------------------------------------
                                       Gary H. Brooks
                                       Its:Vice President, Finance and
                                           Administration, Chief Financial
                                           Officer and Secretary



                          TERARECON SYSTEMS DEVELOPMENT
                              AND PORTING AGREEMENT

     THIS DEVELOPMENT AND PORTING AGREEMENT (the "Agreement") is made as of this
___ day of  _____________,  1997 (the "Effective Date") by and between TERARECON
INC. ("TeraRecon"),  a Delaware corporation, and IMATRON INC. ("Imatron"), a New
Jersey corporation.

     WHEREAS, TeraRecon has developed a proprietary image reconstruction system;

     WHEREAS, Imatron has developed certain image reconstructions algorithms for
use in the  reconstruction  of  Ultrafast  CT(TM)  images for  medical  scanning
applications;

     WHEREAS,  the parties desire TeraRecon to develop certain stand-alone image
reconstruction  systems  incorporating the Imatron algorithms into the TeraRecon
image  reconstruction  system to be sold by Imatron and used in conjunction with
certain Imatron scanners, as more fully described herein;

     WHEREAS,  Imatron  has agreed to issue  warrants  to  TeraRecon  to acquire
shares of Imatron's  Common Stock upon the  completion of certain  milestones in
connection with the development of such image reconstruction systems; and

     WHEREAS,  TeraRecon  desires to develop such image  reconstruction  systems
upon the terms and conditions set forth herein.

      NOW, THEREFORE, the parties hereby agree as follows:

1.    Definitions.

      As used herein, the following terms shall have the following meanings:

     1.1. "Confidential  Information" means any information,  technical data, or
know-how, including, but not limited to, a party's research, products, hardware,
software,  services,  development,  inventions,  processes,  designs,  drawings,
engineering,  marketing, finances, or such other information that is or has been
made available to the party receiving the information (the "Receiving Party") by
the party disclosing the information (the "Disclosing Party") either directly or
indirectly  in  writing,  orally  or by  drawings  or  inspection  of  parts  or
equipment.  Notwithstanding anything to the contrary in this Agreement,  neither
party  shall  have  any   obligation   under  this  Agreement  with  respect  to
Confidential  Information  unless:  (A) if the  Confidential  Information  is in
writing or other  tangible  form  (i.e.,  electronic),  it is clearly  marked as
proprietary and  confidential  when furnished to the Receiving Party: or, (b) if
the  Confidential  Information is not in tangible form, it is identified  orally
and  specifically as proprietary and  confidential at the time of disclosure and
is summarized in a writing so marked and delivered to the Receiving Party within
thirty  (30)  days  after  such  disclosure,  in  which  case  the  Confidential
Information  contained in such summary (not information  contained solely in the
non-tangible  disclosure) shall be subject to the restrictions herein; provided,
however,  that each party  shall have  thirty  (30) days from the date hereof to
summarize all  information  previously  disclosed to the Receiving Party and not
marked  confidential,  and all such  information  shall be  deemed  Confidential
Information.  Neither  party  has any  obligation  to  disclose  any  particular
information to the other under this Agreement.  Confidential  Information  shall
not include any data or  information  which (i) was in the public  domain at the
time it was  disclosed or falls  within the public  domain,  except  through the
fault of a Receiving Party; (ii) was known to the Receiving Party at the time of
disclosure,  which  knowledge  the  Receiving  Party  shall  have the  burden of
establishing by clear and convincing evidence; (iii) was disclosed after written
approval of the Disclosing Party; (iv) becomes known to the Receiving Party from
a source other than the Disclosing Party without breach of this Agreement by the
Receiving  Party;  or (v) was  independently  developed by the  Receiving  Party
without the benefit of  Confidential  Information  received from the  Disclosing
Party,  which independent  development the Receiving Party shall have the burden
of establishing by clear and convincing evidence.

     1.2.  "Development  Program" means the  collaborative  development  program
undertaken  by the  parties  pursuant to this  Agreement,  all as more fully set
forth in Appendix A. 1.3. "Error" means any material failure by a Prototype I or
Prototype  II which  causes such  Prototype I or  Prototype II not to operate in
conformance with the Specifications.

     1.4.  "Fair Market Value" means the average of the closing or last reported
sale prices on the NASDAQ National Market over the 5-day period ending five days
prior to Acceptance as defined in Section 3.2.

     1.5.   "Hardware  Updates"  shall  mean  any  error  corrections  or  other
modifications  to the hardware,  prepared by or on behalf of TeraRecon  that may
enhance performance of the hardware but do not add significant new, different or
enhanced functions or functionality to the hardware.

     1.6.  "Hardware  Upgrades"  shall mean a new  generation  of the  hardware,
prepared by or on behalf of  TeraRecon,  that adds  significant  new or enhanced
functions or functionality to the hardware,  or is meant to significantly change
or enhance the performance of the hardware.

     1.7.  "Imaging  Enhancements"  shall  mean any error  corrections  or other
modifications to the software,  prepared by or on behalf of TeraRecon,  that may
enhance performance of the software.  In the event that TeraRecon undertakes the
development of significant  new or enhanced  functions or  functionality  to the
software for medical imaging interventional radiology applications, which do not
require Hardware Upgrades,  then such new or enhanced functions or functionality
shall be included in "Imaging Enhancements."

     1.8.  "Imatron  Technology"  means the proprietary  Imatron  reconstruction
algorithms,  and all Intellectual  Property Rights included therein necessary to
create the TeraRecon Systems as identified on Appendix B.

     1.9.  "Intellectual  Property  Rights"  means  copyrights,  patents,  trade
secrets and  trademarks,  whether or not registered,  filed,  applied for or the
like, and all related rights.

     1.10.  "Net  Sales"  means the gross  sales  price  received  by  TeraRecon
attributable  to TeraRecon's  sale,  lease or license of the RTR-2000  TeraRecon
System in connection  with medical CT scanning  applications to parties using CT
scanner applications other than Imatron or affiliates of TeraRecon less shipping
expenses, discounts, returns and taxes.

     1.11.  "Non-Imaging  Enhancements"  shall  mean a major new  release of the
software,  prepared by or on behalf of TeraRecon,  that adds  significant new or
enhanced  functions or  functionality  to the  software,  other than for medical
imaging international radiology applications.

     1.12.  "Prototype I" means a 50 millisecond  working  prototype unit of the
RTR-2000 TeraRecon System.

     1.13.  "Prototype II" means a 100 millisecond working prototype unit of the
RTR-2000 TeraRecon System.

     1.14.  "RTR-2000  TeraRecon  System" means the first  generation  Real Time
Reconstruction  ("RTR") imaging processing hardware and software to be developed
and created  pursuant to this Agreement and to be used in conjunction with newly
manufactured  or  previously  installed  Imatron  Ultrafast CT scanners only for
medical scanning  applications and  modifications and improvements to such image
processing  software and hardware,  including Imaging  Enhancements and Hardware
Updates but excluding Non-Imaging Enhancements and Hardware Upgrades thereto.

     1.15.  "Specifications" means the technical and operational  specifications
and system characteristics for the RTR-2000 TeraRecon System as set forth in the
Development Program attached to this Agreement as Appendix A.

     1.16.  "Technology"  means  any or all of  the  TeraRecon  Technology,  the
Imatron Technology or both.

     1.17. "TeraRecon Systems" means image reconstruction  hardware and software
developed by TeraRecon,  including,  without limitation,  the RTR-2000 TeraRecon
System and all modifications and enhancements thereto.

     1.18.  "TeraRecon  Technology" means the property  technology of TeraRecon,
improvements or modifications to such technology,  and all Intellectual Property
Rights included therein,  included in and underlying the TeraRecon  Systems,  as
identified on Appendix C.

     1.19.  "Warrant"  means a warrant to  purchase  Common  Stock of Imatron in
substantially the form attached hereto as Appendix D.

     2. DEVELOPMENT EFFORTS.

     2.1.  Collaboration.  TeraRecon  and Imatron  hereby agree to undertake the
Development Program.  Each party shall have the obligations set forth herein and
in Appendix A.

     2.2. Development Obligations of the Parties.

     2.2.1.   Each  party  agrees,   in  cooperation  with  the  other,  to  use
commercially  reasonable  efforts to realize the  objectives of the  Development
Program and to achieve the  milestones  on a timely  basis,  including,  without
limitation,   supplying  the  necessary  personnel,   facilities  and  materials
necessary to carry out the Development Program.

     2.2.2. Imatron will: (a) make available to TeraRecon the Imatron Technology
as  required  by  TeraRecon  to perform its  obligations  under the  Development
Program; and (b) provide to TeraRecon,  as soon as reasonably available,  copies
of  the  tangible  aspects  of  such  Imatron  Technology   including,   without
limitation, applicable specifications and other engineering documents.

     2.2.3.  During the  course of the  Development  Program,  in the event that
either party reasonably  believes  modifications to the Development  Program are
necessary to carry out the intent of this  Agreement,  the  Development  Program
shall be modified  with the written  consent of the other party,  which  consent
shall not be  unreasonably  withheld.  The parties will then mutually agree upon
such changes in good faith.  The parties shall cause Appendix A to be amended in
the event of any such  modifications  to reflect the changes to the  Development
Program. An amended Appendix A shall supersede all prior Appendix A and become a
part of this Agreement.

     2.2.4.  No  compensation  will be due  Imatron for its  performance  of its
obligations  under this  Agreement,  and Imatron shall bear all of its own costs
and expenses associated with such performance:  provided,  however, that so long
as  Imatron  provides  TeraRecon  with  certain  space  at  Imatron's  facility,
TeraRecon may be billed for telephone and fax expenses.

     2.2.5.  The  parties  agree that they shall  have their  personnel  meet as
frequently as needed to determine scheduling and pertinent technical issues with
respect  to the  Development  Program.  Such  meetings  shall  be  held  at such
locations as the parties  shall  jointly  determine.  Each party shall appoint a
qualified  person to act as project  manager.  The project  managers will act as
each party's  representative  and principal contact person regarding all matters
related to this Agreement.

     2.2.6.   Imatron  shall  provide   TeraRecon   with  improved  and  updated
reconstruction  algorithms and the parties further agree to otherwise  cooperate
with one another to improve the image  quality and  performance  of the RTR-2000
TeraRecon System.

     3. ACCEPTANCE CRITERIA AND PERFORMANCE SPECIFICATIONS.

     3.1.  Acceptance  Criteria.  Each  Prototype  I and  Prototype  II  (each a
"Prototype" or  collectively  the  "Prototypes")  shall be subject to acceptance
testing by Imatron to verify that each Prototype  conforms to the Specifications
mutually agreed upon by Imatron and TeraRecon for said Prototype as set forth in
the  Development  Program  and  modified  from time to time in  accordance  with
Section 2.2.3.

     3.2.  Acceptance  Testing.  Acceptance  testing for the Prototype I and the
Prototype II shall commence when TeraRecon notifies Imatron in writing that such
prototype conforms to the Specifications, and is ready for acceptance testing by
Imatron (the  "Completion  Notice").  Within ten (10) days after  receipt of the
Completion Notice,  Imatron will perform acceptance tests at Imatron's South San
Francisco  facility to determine  whether such Prototype  exhibits Errors.  If a
Prototype conforms to the Specifications,  Imatron will accept such Prototype by
sending   written   notice  to  TeraRecon.   Imatron  will  be  deemed  to  have
unconditionally  accepted  such  Prototype if Imatron  does not provide,  within
thirty  (30) days  after  receipt  of the  Completion  Notice  (the  "Acceptance
Period"),  written  acceptance  in  accordance  with this Section 3.2 or written
rejection  in  accordance  with Section  3.2.1  below.  For the purposes of this
Agreement,  acceptance  by  written  notice or by  failing  to  provide  written
acceptance or written rejection shall be deemed "Acceptance."

     3.2.1.  Retesting.  If Imatron determines that the Prototype I or Prototype
II  exhibits  Errors  on the  basis of the  acceptance  testing,  Imatron  shall
promptly notify TeraRecon in writing ("Notice of Errors") and shall specify with
as much detail as possible the Errors exhibited by such Prototype.  If TeraRecon
receives a Notice of Errors,  TeraRecon  and Imatron  shall first  cooperate  in
seeking a way to correct  the Errors  which does not  require a redesign  of the
Prototype I or  Prototype  II, as  applicable.  Imatron will submit to TeraRecon
such data as TeraRecon may reasonably  request in order to verify,  diagnose and
correct an Error.  If no such  correction is possible in TeraRecon's  reasonable
judgment, TeraRecon and Imatron shall agree in good faith on what design changes
are necessary to correct the Errors and then modify the Development  Program and
amend Appendix A  accordingly.  TeraRecon  shall then use reasonable  commercial
efforts to correct the Errors at TeraRecon's sole cost and expense on a mutually
agreed upon schedule. Upon completion of the corrective action by TeraRecon, the
Acceptance Test will be repeated until such Prototype no longer exhibits Errors.
If  correcting of such Errors is not  feasible,  as  determined  in  TeraRecon's
reasonable  commercial  judgment,   Imatron  or  TeraRecon  may  terminate  this
Agreement  in  accordance  with  Section  14,  which such  termination  shall be
Imatron's  sole and  exclusive  remedy for  TeraRecon's  failure to remedy  such
Error.

     4. WARRANT PAYMENTS TO TERARECON.

     4.1.  Within ten (10) days of Acceptance by Imatron of the first  Prototype
I, Imatron shall, for no additional charge, issue a Warrant to TeraRecon for the
purchase of  1,000,000  shares of Common  Stock of Imatron (as  adjusted for any
stock splits, dividends, recapitalizations or the like) with a four-year term at
an exercise price determined in accordance with Section 4.5 below.

     4.2.  Within ten (10) days of Acceptance by Imatron of three (3) additional
Prototype  I units,  TeraRecon  shall  purchase  a Warrant  of the  purchase  of
2,000,000  shares of Common Stock of Imatron (as adjusted for any stock  splits,
dividends,  recapitalizations  or the like) with a four-year term at an exercise
price determined in accordance with Section 4.5 below for an aggregate  purchase
price of $1,000,000.

     4.3.  Within ten (10) days of Acceptance by Imatron of the first  Prototype
II unit, Imatron shall, for no additional  charge,  issue a Warrant to TeraRecon
for the purchase of 1,000,000 shares of Common Stock of Imatron (as adjusted for
any stock  splits,  dividends,  recapitalizations  or the like) with a four-year
term at an exercise price determined in accordance with Section 4.5 below.

     4.4.  Within ten (10) days of Acceptance  by Imatron of six (6)  additional
Prototype  II units,  TeraRecon  shall  purchase a Warrant  for the  purchase of
2,000,000  shares of Common Stock of Imatron (as adjusted for any stock  splits,
dividends, recapitalizations or the like) of Imatron with a four-year term at an
exercise price  determined in accordance with Section 4.5 below for an aggregate
purchase price of $1,000,000.

     4.5. The exercise  price for the Warrants  issued  pursuant to Sections 4.1
through  4.4 above  shall be $4.50 per share;  provided  that if the Fair Market
Value of the  Common  Stock of  Imatron  is less than  $2.00 per share  than the
exercise  price  shall be  equal to 180% of such  Fair  Market  Value;  provided
further,  that the exercise  price shall not be less than $1.50 per share in any
case.

          4.6. Investment Representations.

     (a) Risk.  TeraRecon  is aware  that an  investment  in  Imatron  is highly
speculative  and that there can be no assurance as to what, if any,  return that
there may be on TeraRecon's  investment in the Warrants and the share of Imatron
common stock to be issued upon  exercise of the  Warrants  (the  "Shares").  The
Warrants and the Shares are collectively referred to herein as the "Securities."
TeraRecon is aware of Imatron's business affairs and financial condition and has
acquired  sufficient  information about Imatron to be able to evaluate the risks
and merits of the proposed investment and to reach an informed and knowledgeable
decision to acquire the Securities.

     (b) Experience.  TeraRecon is capable of evaluating the merits and risks of
its  investment  in Imatron and has the  capacity to protect its own  interests.
TeraRecon also represents it has not been organized for the purpose of acquiring
the Securities offered hereby.

      (c) Principal Place of Business. TeraRecon's principal place
of business is located at the address set forth below.

      (d)  Investment.  TeraRecon is acquiring the Securities for investment for
its own  account,  not as a nominee  or agent,  and not with the view to, or for
public resale in connection with, any  distribution  thereof other than pursuant
to a  registration  as  contemplated  hereby.  TeraRecon  understands  that  the
Warrants and the Shares have not been  registered  under the  Securities  Act by
reason  of  a  specific  exemption  from  the  registration  provisions  of  the
Securities Act, the availability of which depends upon, among other things,  the
bona fide nature of the investment  intent and the accuracy of such  purchaser's
representations as expressed herein.

     (e) Rule 144. TeraRecon  acknowledges that the Securities are characterized
as "restricted  securities"  under the federal  securities laws and must be held
indefinitely unless  subsequently  registered under the Securities Act or unless
an exemption  from such  registration  is  available.  TeraRecon is aware of the
provisions  of Rule 144  promulgated  under the  Securities  Act  which  permits
limited public resale of shares purchased in a private  placement subject to the
satisfaction of certain conditions, including, among other things, the existence
of a public market for the shares,  the  availability  of certain current public
information about the issuer, the resale occurring not less than two years after
a party has  purchased  and paid for the  security  to be sold,  the sale  being
effected  through a "broker's  transaction" or in  transactions  directly with a
"market maker" and the number of shares being sold during any three-month period
not exceeding specified limitations.

     (f) Access to Data.  TeraRecon has had an opportunity to discuss  Imatron's
businesses,  management  and  financial  affairs  with  its  management  and the
opportunity to review  Imatron's  facilities and financial  data.  TeraRecon has
also had an opportunity to ask questions of officers of Imatron, which questions
were answered to its, his or her satisfaction.

     4.7. Warrant Purchase Agreement.  In connection with the offer and issuance
of any of the Securities, the parties agree to execute and deliver to each other
a Warrant Purchase Agreement in the form of Appendix E hereto

5.   RESTRICTIONS ON USE.

     5.1.  Prototype  I and  Prototype  II Use.  The use of the  Prototype I and
Prototype  II shall be  limited to product  development,  promotional  purposes,
training,  engineering "Alpha" testing and clinical "Beta" testing and expressly
not for commercial  production,  distribution or medical treatment of any person
without the prior written consent of TeraRecon. The Prototype I and Prototype II
are intended for human use in their "Alpha" and "Beta" testing  applications  in
clinical settings;  provided,  however, that Imatron will defend,  indemnify and
hold harmless TeraRecon from and against any losses, damages,  expenses or other
costs (including, without limitation, reasonable attorney's fees) arising out of
or  resulting  from any  claims in  connection  with any human  use,  treatment,
observation and/or diagnosis.

     5.2.  Trademark  Display.  TeraRecon  will provide to Imatron copies of its
logos and/or trademarks (the "Marks") for the purposes of including the Marks in
any  display or  demonstration  of the  RTR-2000  TeraRecon  System by  Imatron.
Imatron  will  use the  Marks  during  any  such  display  or  demonstration  in
conformance  with such written  instructions as TeraRecon may provide to Imatron
from time to time.

     5.3. No Unauthorized Warranties.  Imatron will not make or extend on behalf
of TeraRecon any written or oral warranty with respect to any RTR-2000 TeraRecon
System without the express prior written consent of TeraRecon.  Imatron will not
advise,  perform or demonstrate any use or application of any RTR-2000 TeraRecon
System that is not specifically  approved in writing by TeraRecon.  Imatron will
not  impair  the  integrity  of the  RTR-2000  TeraRecon  System  while it is in
Imatron's custody.

     5.4.  Compliance  with Laws.  Imatron  represents  and warrants  that it is
familiar  and will comply in all  respects  with  applicable  laws,  ordinances,
regulations and other governmental requirements concerning the marketing,  sale,
demonstration,  use  and  distribution  of the  Imatron  Ultrafast  CT  Scanner,
including,  without limitation,  regulations of the Food and Drug Administration
("FDA").  TeraRecon shall be responsible for obtaining  applicable FDA approval,
IEC601 approval, and CE Mark and ISO 9001 approval in accordance with applicable
European  regulations for the RTR-2000  TeraRecon System;  provided that Imatron
will fully cooperate with and assist  TeraRecon in obtaining all such approvals.
Notwithstanding  the  foregoing,  TeraRecon  shall not be required to obtain any
such approvals for the Prototype I or Prototype II.

     5.5.  Indemnification.  Imatron will defend,  indemnify  and hold  harmless
TeraRecon  from and  against  any  losses,  damages,  expenses  or  other  costs
(including,  without limitation,  reasonable  attorney's fees) arising out of or
resulting from any breach or alleged breach of this Section 5.

6.   MANUFACTURE AND SALE AGREEMENT.

     Upon  successful  completion  of  the  Development  Program,   Imatron  and
TeraRecon  shall in good faith enter into a manufacture and sale agreement which
shall include, without limitation, the following:

     6.1. TeraRecon shall manufacture and sell the RTR-2000 TeraRecon Systems to
Imatron on an OEM basis for  distribution  solely in connection with the Imatron
Ultrafast CT Scanner for medical use;

     6.2.  Imatron  shall have an exclusive  right to sell or lease the RTR-2000
TeraRecon  Systems to existing owners of the Imatron Ultrafast CT Scanner and to
purchasers of the Imatron Ultrafast CT Scanner in connection with such purchase;
provided,  however,  that in the event  Imatron  ceases to use its best  efforts
(including customary print and promotional  materials,  product  demonstrations,
sales people and trade show promotions) to sell or lease the TRT-2000  TeraRecon
Systems,  as  determined  in good  faith by both  Imatron  and  TeraRecon,  then
Imatron's  exclusive  sales  right  as set  forth  in  this  Section  6.2  shall
terminate;

     6.3.  TeraRecon  shall  retain  the  right to sell,  lease or  license  the
TeraRecon Systems to other medical imaging systems customers; provided, however,
that such TeraRecon Systems shall not include any Imatron Technology;

     6.4. The purchase price for the RTR-2000  TeraRecon System shall be $40,000
through December 31, 1998;

     6.5.  TeraRecon  shall make the  RTR-2000  TeraRecon  System  available  to
Imatron for the five-year period commencing on the Effective Date; provided that
if TeraRecon terminates  production of the RTR-2000 TeraRecon System before such
time, TeraRecon shall provide Imatron with a replacement  TeraRecon System which
meets the  Specification  and performs at least the same set of functions as the
RTR-2000 TeraRecon System performs;

     6.6. Such additional terms and conditions as are necessary and appropriate,
including,   without  limitation,   customary  provisions  relating  to  limited
warranties and  limitation of liability  between the parties and with respect to
customers.

7.   INTENTIONALLY DELETED.

8.   ROYALTY PAYMENTS TO IMATRON.

     8.1.  TeraRecon  shall make royalty  payments to Imatron equal to 3% of the
Net Sales (the "Royalty Payments"),  provided, however, that TeraRecon shall not
be required to make such Royalty Payments:

     (a) on the sale, lease or license of RTR-2000  TeraRecon  Systems occurring
after the fourth anniversary of the Effective Date; or

     (b) in the event that  Imatron  fails to perform in any  material way under
the terms of this Agreement or any other  agreement  between the parties hereto,
including the agreements contemplated hereby; or

     (c)  relating to any fiscal year in which  Imatron  does not  purchase  the
greater of five (5)  RTR-2000  TeraRecon  Systems  and that  number of  RTR-2000
TeraRecon  Systems  equal to at least 30% of the number of Imatron  Ultrafast CT
Scanners sold, leased or licensed in such fiscal year.

     8.2. Royalty Payments shall be made as soon as practicable after the end of
each  fiscal  year  of  TeraRecon,  and in any  event  within  sixty  (60)  days
thereafter.

9.   OWNERSHIP OF TECHNOLOGY.

     9.1.  TeraRecon  Technology;  Imatron  Technology.  The parties  agree that
TeraRecon  shall retain all right,  title and  interest in and to the  TeraRecon
Technology, and all Intellectual Property Rights therein, and that Imatron shall
retain all right, title and interest in and to the Imatron  Technology,  and all
Intellectual Property Rights therein.

     9.2. Newly Created  Technology.  The parties agree that TeraRecon shall own
all right, title and interest in and to any new technology  developed or created
pursuant to, or otherwise  arising out of the  Development  Program  (including,
without limitation,  the TeraRecon Systems),  any improvements and modifications
to such new technology,  and all  Intellectual  Property Rights therein.  To the
extent that Imatron may be deemed to have assisted  TeraRecon in or otherwise to
have contributed to the development or creation of such new technology,  Imatron
hereby  assigns to TeraRecon all right,  title and interest  Imatron may have in
and to such new technology, including all Intellectual Property Rights therein.

10.  NO GRANT OF LICENSE.

     Nothing in this Agreement or the  Development  Program shall imply that any
license to the Imatron  Technology  shall have been  transferred from Imatron to
TeraRecon  or that any  license  to the  TeraRecon  Technology  shall  have been
transferred  from TeraRecon to Imatron.  TeraRecon  represents  that it will not
include  Imatron  Technology in the  TeraRecon  Systems  manufactured  for other
medical imaging systems customers; provided that Imatron agrees and acknowledges
that nothing in this Agreement shall be deemed or construed to prevent TeraRecon
from developing,  manufacturing  and selling  TeraRecon Systems to other medical
imaging systems customers. In particular,  Imatron agrees that,  notwithstanding
anything to the contrary in this Section 10,  TeraRecon  shall be free to use or
disclose to any third party any generalized ideas, concepts,  know-how, methods,
techniques or skills in possession of TeraRecon prior to the Development Program
or gained or learned by TeraRecon during the course of the Development  Program,
so long as such use or  disclosure  does not infringe on any patent,  copyright,
trade secret or trademark of Imatron or include any Confidential  Information of
Imatron as  defined  in Section  1.1.  TeraRecon  agrees and  acknowledges  that
nothing in this Agreement  shall be deemed or construed to prevent  Imatron from
developing,  manufacturing and selling image reconstruction  systems;  provided,
however, that such image reconstruction  systems shall not include any TeraRecon
Technology.

 11.      WARRANTY DISCLAIMER.

     IMATRON AGREES AND  ACKNOWLEDGES  THAT THE PROTOTYPE I AND PROTOTYPE II ARE
PROVIDED AS-IS,  AND THAT TERARECON MAKES NO  REPRESENTATION  OR WARRANTY OF ANY
KIND WITH REGARD TO ANY PRODUCT FURNISHED UNDER THIS AGREEMENT. TERARECON HEREBY
EXPRESSLY  DISCLAIMS ALL  WARRANTIES AND  OBLIGATIONS  OF TERARECON,  EXPRESS OR
IMPLIED, ARISING BY LAW OR OTHERWISE, WITH RESPECT TO THE PROTOTYPE I, PROTOTYPE
II OR ANY OTHER  PRODUCTS  DELIVERED  BY OR ON BEHALF OF  TERARECON  UNDER  THIS
AGREEMENT  (INCLUDING,  BUT NOT LIMITED TO, ANY WARRANTY OF  MERCHANTABILITY  OR
FITNESS FOR A PARTICULAR PURPOSE).

12.INTELLECTUAL PROPERTY INDEMNITY.

     12.1. TeraRecon and its affiliates own all right, title and interest in the
TeraRecon  Technology.  TeraRecon  has the  power to cause and will  cause  such
affiliates  to transfer to TeraRecon all  technology  necessary for TeraRecon to
perform under this Agreement.  TeraRecon represents and warrants that the use of
the TeraRecon  Technology in the  development,  creating and  manufacture of the
Prototype I and Prototype II does not infringe any copyright, trademark or trade
secret rights of any third party.

     12.2.  Imatron owns all right, title and interest in the Imatron Technology
necessary for Imatron to perform under this  Agreement.  Imatron  represents and
warrants that the use of the Imatron Technology in the development, creation and
manufacture of the Prototype I and Prototype II does not infringe any copyright,
trademark or trade secret rights of any third party.

     12.3.  Each party will defend,  indemnify and hold harmless the other party
from and  against  any breach or  alleged  breach of  Section  12.1 or 12.2,  as
applicable,  and pay any  costs,  damages,  liabilities  or  expense  (including
reasonable  attorneys' fees) incurred by the other arising out of or relating to
such action, provided the party seeking indemnification ("Indemnified Party" (i)
notifies the indemnifying  party  ("Indemnifying  Party") promptly in writing of
any such action;  (ii) gives the indemnifying  party sole control of the defense
and  any  negotiations  for  settlement  or  compromise  of such  action;  (iii)
cooperates  with the  Indemnifying  Party and provides  such  assistance  as the
Indemnifying  Party may  reasonably  request in  connection  with the defense or
settlement of the claim; (iv) does not settle the claim without the Indemnifying
Party's written consent,  which consent will not be unreasonably  withheld;  and
(v) complies  with any  settlement  or court order made in  connection  with the
claim. Should the Indemnifying Party's Technology become, or in the Indemnifying
Party's  opinion  be  likely to  become,  the  subject  of such an  action,  the
Indemnified  Party shall  permit the  Indemnifying  Party,  at the  Indemnifying
Party's option and sole expense, either (A) to procure for the Indemnified Party
the right to continue using the Indemnifying  Party's  Technology or (B) replace
or modify the same to become  noninfringing  if such replacement or modification
does not materially affect the performance of the Product. The Indemnified Party
agrees to provide  reasonable  assistance to the  Indemnifying  Party to procure
such  rights or replace or modify the  Indemnifying  Party's  Technology  at the
Indemnifying  Party's expense.  However,  the  Indemnifying  Party shall have no
liability  to the  Indemnified  Party under this  Section 12 for any such action
based upon (A) any  modification of the Indemnifying  party's  Technology or (B)
the combination of the Indemnifying  Party's  Technology with other items by the
Indemnified  Party other than as  contemplated  by this Agreement if such action
would have been avoided by the absence of such combination or modification. This
Section 12.3 sets forth each party's exclusive remedy and entire liability for a
breach or alleged breach of Section 12.1 or 12.2, as applicable.

13.  Non-Disclosure.

     13.1. Scope of Use. Each party will use the Confidential Information solely
to  accomplish  the  purposes  of this  Agreement  and  will  not  disclose  the
Confidential  Information  to any person except its employees or  consultants to
whom it is necessary to disclose the Confidential Information for such purposes.
Each party agrees that the  Confidential  Information  will be disclosed or made
available  only to those of its  employees  or  consultants  who have  agreed to
receive  it  under  terms at least as  restrictive  as those  specified  in this
Agreement.  Each party agrees not to copy, alter, modify,  disassemble,  reverse
engineer or otherwise reproduce any of the Confidential  Information,  except as
required to accomplish the intent of this Agreement, unless permitted in writing
by the  Disclosing  Party.  Each party will use its bets efforts to maintain the
confidentiality of the Confidential  Information,  but not less than the measure
it uses for its own  confidential  information of similar type.  Each party will
immediately  notify  the  other of any  unauthorized  use or  disclosure  of the
Confidential  Information  and  will  assist  the  other in  remedying  any such
unauthorized use or disclosure.

     13.2. Permitted  Disclosure.  Notwithstanding  Section 13.1,  disclosure of
Confidential  Information  shall  not be  precluded  if such  disclosure:  is in
response  to a valid order of a court or other  governmental  body of the United
States  or any  political  subdivision  thereof;  provided,  however,  that  the
responding  party  shall first have given  notice to the other party  hereto and
shall have made a reasonable  effort to obtain a protective  order requiring the
that  Confidential  Information  so  disclosed be used only for the purposes for
which the order was  issued;  is  otherwise  required  by law;  or is  otherwise
necessary to establish rights or enforce  obligations under this Agreement,  but
only to the extent that any such disclosure is necessary.

     13.3. No Solicitation of Employees.  During the two-year period  commencing
with the Effective Date,  neither  TeraRecon nor Imatron,  nor any affiliates of
TeraRecon or Imatron, will solicit or seek to employee any employee of the other
party, or any affiliate of such other party.

14.  TERM AND TERMINATION.

     14.1. Term. The term of this Agreement will begin on the Effective Date and
will continue until the final  milestone is completed and accepted and TeraRecon
receives  the  Warrants  pursuant  to  Section  4,  unless  earlier   terminated
hereunder.

     14.2. Termination.  Notwithstanding anything herein to the contrary, either
party will have the right, in addition and without prejudice to any other rights
or remedies, to terminate this Agreement if:

     14.2.1. Both parties agree in writing to so terminate this Agreement; or

     14.2.2.  The other party commits a material breach of the terms hereof that
has not been  remedied  within  ninety  (90) days of the receipt by the party in
default of notice specifying the breach and requiring its remedy; or

     14.2.3.  TeraRecon determines in its reasonable commercial judgment that it
is not feasible to correct errors after  completing  the retesting  procedure in
Section 3.2.1.

     14.2.4.  TeraRecon has not delivered the Prototypes in accordance  with the
Milestone  Schedule  set forth in the  Development  Program,  as  modified  from
time-to-time by Sections 2.2.3 and 3.2.1.

     14.3. Accrued Rights.  Termination or expiration of this Agreement will not
affect any other rights of the parties  which may have accrued up to the date of
such  termination or expiration  and, in addition,  no party will be relieved of
any obligation for any sums due to the other party.

     14.4.  Survival.  The  following  Sections  will survive any  expiration or
termination of this Agreement: 4, 5, 8, 9, 10, 11, 12, 13, 14, 15, 17 and 18.

15.  LIMITATION OF LIABILITY.

     15.1.  IN NO EVENT SHALL  EITHER  PARTY BE LIABLE TO THE OTHER PARTY OR ANY
THIRD PARTY FOR ANY CONSEQUENTIAL,  EXEMPLARY,  SPECIAL,  INDIRECT OR INCIDENTAL
DAMAGES,  INCLUDING, BUT NOT LIMITED TO, LOST PROFITS, DATA, SAVING OR REVENUES,
ARISING OUT OF OR RELATED TO THIS  AGREEMENT,  WHETHER  UNDER TORT,  CONTRACT OR
OTHER THEORIES OF LIABILITY (INCLUDING STRICT LIABILITY), EVEN IF SUCH PARTY HAS
BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.

     15.2.  IN NO  CASE  WILL  TERARECON'S  LIABILITY  UNDER  THE  TERMS  OF THE
AGREEMENT EXCEED THE AMOUNTS ACTUALLY PAID TO TERARECON HEREUNDER.  FOR PURPOSES
OF THIS  SECTION,  NO VALUE WILL BE  ATTRIBUTED  TO WARRANTS  WITH A SHARE PRICE
GREATER THAN THE CURRENT FAIR MARKET VALUE OF THE COMMON STOCK ON THE  EFFECTIVE
DATE.

16.  ASSIGNMENT.

     No party may assign its rights or  obligations  under this Agreement to any
third party without the prior written consent of the other party,  except that a
party may assign such rights and  obligations  to an entity  which  purchases or
otherwise acquires all or substantially all of the assets of such party.

17.  GENERAL PROVISIONS.

     17.1.  Force  Majeure.  No party  hereto  will be liable for default of any
obligation  hereunder  other than the payment of money if such  default  results
from  force  majeure,  including,  without  limitation,   governmental  acts  or
directives;  strikes or shortage of supplies;  acts of God;  war;  insurrection,
riot or civil  commotion;  fires,  explosions,  flooding,  earthquakes  or water
damage; or embargoes;  or any other events whether of the kind herein enumerated
or otherwise,  that are not within the reasonable control of the party affected.
In such event,  and as a condition  to excuse of  performance  by reason of this
Section 17.1, the affected party will promptly give notice of the  circumstances
responsible  for such  party's  nonperformance  to the  other  parties,  and the
affected party will act in good faith and use commercially reasonable efforts to
remedy or minimize the effects of such circumstances.

     17.2. No Agency. The parties to this Agreement are independent contractors.
Nothing  in  this   Agreement   shall  be  construed  as  creating  any  agency,
partnership,  joint  venture or any other form of joint  enterprise  between the
parties.

     17.3.  Notices.  Any notice required or permitted under this Agreement will
be given in writing and will be deemed  effectively given upon personal delivery
to the party to be notified by hand,  professional courier service or facsimile,
one day after deposit with Federal Express or other overnight  delivery service,
or two days after deposit with the United  States Post Office,  by registered or
certified mail, postage prepaid and addressed to the party to be notified at the
address as set forth below, or at such other address as such party may designate
by five days' advance written notice to the other party.

     17.4.  Application  of  California  Law.  This  Agreement  will be governed
exclusively  by its terms and by the laws of the  State of  California,  without
regard to conflict of laws principles.

     17.5. Amendments.  An amendment to this Agreement will be effective only by
a writing executed by the parties to this Agreement.

     17.6. Headings. The headings in this Agreement are inserted for convenience
only and are in no way intended to  describe,  interpret,  define,  or limit the
scope, extent or intent of this Agreement or any provisions hereof.

     17.7.  Waivers.  The failure of any party to seek redress for  violation of
any term,  covenant or condition of this Agreement will not prevent a subsequent
act, that would have originally constituted a violation,  from having the effect
of an original violation.

     17.8. Rights and Remedies  Cumulative.  The rights and remedies provided by
this  Agreement  are  cumulative,  and the use of any one right or remedy by any
party  will not  preclude  or waive the right to use any or all other  remedies.
Such rights and  remedies  are given in addition to any other rights the parties
may have by law, statute, ordinance or otherwise.

     17.9. Entire Agreement.  This Agreement,  together with any attachments and
exhibits hereto,  constitute the entire agreement of the parties with respect to
their subject  matter,  and  supersede and replace any prior or  contemporaneous
understandings  or  agreements,  whether  oral or  written,  between the parties
including,  without limitation, the Agreement in Principle, dated March 7, 1997,
between the parties  hereto and the  Non-Disclosure  Agreement,  dated March 10,
1997, between the parties hereto.

     17.10. Severability.  If any provision of this Agreement or the application
thereof to any person or circumstance will be invalid,  illegal or unenforceable
to any extent, the remainder of this Agreement and application  thereof will not
be affected and will be enforceable to the fullest extent permitted by law.

     17.11. Heirs, Successors and Assigns. Each and all of the covenants, terms,
provisions and agreements herein contained will be binding upon and inure to the
benefit of the parties  hereto and, to the extent  permitted by this  Agreement,
their respective heirs, legal representatives, successors and assigns.

     17.12. Counterparts.  This Agreement may be executed in counterparts,  each
of which will be deemed an original but all of which will constitute one and the
same instrument.

     IN WITNESS WHEREOF,  the undersigned have executed this Agreement as of the
Effective Date.

                              TERARECON INC.


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

                              Name:
                                  ----------------------------------------------
                              Title:
                                   ---------------------------------------------

                              Address:

                                   ---------------------------------------------
                                   ---------------------------------------------
                                   ---------------------------------------------
                              Attn:
                                   ---------------------------------------------


                              IMATRON INC.


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

                              Name:
                                   ---------------------------------------------

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

                              Address:
                                   ---------------------------------------------
                                   ---------------------------------------------
                                   ---------------------------------------------
                              Attn:
                                   ---------------------------------------------

<PAGE>


                                   APPENDIX A

                               DEVELOPMENT PROGRAM

A.   RTR-2000 TERARECON SYSTEMS

     The  Prototype  I and  Prototype  II  will  be  developed  on a time  frame
consistent with the Milestone Schedule below.

B.   MILESTONE SCHEDULE

     1.   Delivery  of the first  Prototype I shall be made no later than August
          31, 1997.

     2.   Delivery  of three  (3)  additional  Prototype  i units  shall be made
          within thirty (30) days of Acceptance of the first Prototype I.

     3.   Delivery of the first  Prototype  II shall be made  within  sixty (60)
          days of Acceptance of the first Prototype I.

     4.   Delivery of six (6) additional Prototype II units shall be made within
          thirty (30) days of Acceptance of the first Prototype II.

     5.   Upgrade of four (4)  Prototype I units to  Prototype II units shall be
          made within thirty (30) days of delivery of six (6) Prototype II units
          pursuant to provision B(4) above.

C.   SPECIFICATIONS

     Prototype I. 50 Millisecond mode, all pictures are 256 by 256

     1.   Cine Fluoro-mode 17.2 frames per second real-time reconstruction mode.
          Image quality should be comparable to Imatron 50 millisecond pictures.

     2.   Averaged  Fluoro-mode Two to six, "n", data sets would be averaged and
          then  reconstructed.  This would run at 17.2/n frames per second.  The
          usual speed would probably be 17.2/3 = 5.7,  advertised as 6. With the
          new  detector  this  might  produce  5 rows  of  holes,  high  and low
          contrast.

     Prototype II. 100 millisecond mode, 256 by 256 zoom or 512 by 512

     1. Triggered Average Mode.

          A trigger  takes n sweeps.  The data from these is averaged and then
          the picture is reconstructed. The time to display the image after
          scanning stops is: 360 milliseconds.

     2.   Averaged  Fluoro-mode.  Three or more data sets are  averaged and then
          the average is displayed.

          Themaximum running rate is3 frames per second.The image quality of the
          Prototype II should be  comparable  to the C-150  pictures of the same
          data. In the event of a disagreement  about image quality,  a panel of
          three independent interventional radiologists will evaluate such image
          quality.  The panel shall be comprised of one independent  radiologist
          appointed  by each of Imatron  and Tera Recon and a third  independent
          radiologists chosen by mutual agreement of the first two radiologists.
<PAGE>
                                   APPENDIX B

IMATRON TECHNOLOGY

     (1) Method to make pin interpolation for Imatron scanner data

     (2) Details of scatter correction for Imatron scanner data

     (3) Beam hardening correction

     (4)  Function  to  find   coefficients  to  optimize   convolution   kernel
          specifically designed for Imatron scanner

     (5) General advice on mathematical computation method
<PAGE>
                                   APPENDIX C

TERARECON TECHNOLOGY

     (1)  Know-how of implementing computerized data correction

     (2)  Know-how  of  implementing  reconstruction  of  the  images  from  the
          projected data sets using HISC processor (Imagine 1)

     (3)  Know-how of implementing device driver for RTR-2000 TeraRecon Systems

     (4)  Know-how of implementing the visualization  function for reconstructed
          images using HISC processor (Imagine 1)

     (5)  The source  does of the  programs  developed  for  RTR-2000  TeraRecon
          Systems

     (6)  Programming method using HISC processor

     (7)  Know-how of developing the custom boards using HISC processors

     (8)  Know-how  of  high-speed  data  transfer  board  system  for  RTR-2000
          TeraRecon Systems

     (9)  Know-how o  high-speed  data  acquisition  board  systems  for Imatron
          system in connection with the RTR-2000 TeraRecon Systems

     (10) Know-how of  modifying  Imatron's  data  capture  board for the use of
          high-speed  data  acquisition  board  system  in  connection  with the
          RTR-2000 TeraRecon Systems.

<PAGE>

                                   APPENDIX D

                                    WARRANT
<PAGE>


                                   APPENDIX E

                           WARRANT PURCHASE AGREEMENT

                                   EXHIBIT 7.2

Contact:

S. Lewis Meyer, President/CEO                          Jeffrey Lloyd/Jody Martin
Gary Brooks, VP Finance/CFO                            Sitrick And Company
Lisa Kimberlin, Investor Relations                     (310) 788-2850
(415) 583-9964
                                                       Tim Frandsen, TeraRecon
                                                       (415) 816-4511


For Immediate Release

                IMATRON AND TERARECON SIGN DEVELOPMENT AGREEMENT
           Positions Imatron to Enter Interventional Radiology Market

     So. San Francisco,  Calif.,  July 30, 1997 -- Imatron Inc.  (Nasdaq:  IMAT)
today announced that it has entered into a development  agreement with TeraRecon
Inc.,  which will expand  Imatron's  Ultrafast  CT(R)  current  applications  to
include  new,  3-D, CT  fluorography,  or  real-time  viewing of CT images.  The
agreement  provides Imatron with proprietary,  real-time,  image  reconstruction
systems for CT  (computerized  tomography)  applications  in the  interventional
radiology  market.  Called the RTR-2000,  this system will reconstruct data at a
rate of seventeen complete images per second.

     Upon  completion of development  and when  delivered,  the RTR-2000 will be
exclusive to Imatron's  Ultrafast CT scanner.  This new  technology  will enable
Imatron  to be an  immediate  market  contender  in the areas of  interventional
radiology  and  real-time,  image  guided  microsurgery,   by  having  scan  and
reconstruction times significantly faster than existing technologies.

     In   consideration   for  the  successful   development   and  delivery  of
specifically mandated RTR-2000 systems, Imatron has agreed to issue to TeraRecon
an aggregate of 6 million  warrants to purchase  Imatron's common stock at $4.50
per  share.  The  warrants  will be issued in  installments  based on  TeraRecon
achieving certain milestones.  In addition to delivering the systems,  TeraRecon
has agreed to pay the  Company an  aggregate  of $2 million for 4 million of the
warrants and to pay a royalty on certain  image  reconstruction  systems sold to
third parties.

     S. Lewis Meyer, President and CEO of Imatron,  stated, "This agreement with
TeraRecon  positions  Imatron to enter medical  imaging  markets  previously not
pursued by the  Company,  such as  interventional  radiology.  A recent  Frost &
Sullivan  medical  imaging  market  report   characterized  the   interventional
radiology  market as an opportunity for `soaring'  future growth.  Not only will
the technological superiority of the RTR-2000 establish our Ultrafast CT scanner
as a major  participant in general CT imaging,  but it will also  strengthen our
exclusive, pioneering position in cardiac imaging and coronary artery scanning.

     "Imatron  scanners  equipped  with  the  new  RTR-2000  will  provide  many
additional capabilities such as real-time monitoring of patient scans, real-time
viewing of the flow of contrast medium and real-time, image guided microsurgery,
in  addition to  real-time,  CT guided,  surgical  biopsies  and faster  general
radiology exam times.  We are very excited to be working with TeraRecon on these
unrivaled  advances  with  Ultrafast  CT, and are eager to launch  the  RTR-2000
implementation over the next few months," Mr. Meyer added.

     The first  prototype  RTR-2000  systems  are  expected to be  delivered  to
Imatron in late September,  with  production  quantity  deliveries  scheduled to
begin by November 1, 1997. The Company is already in negotiations to place these
proprietary  systems at various  sites.  Each  system  will be  available  as an
upgrade kit for Imatron Ultrafast CT C-100 and C-150 customers.

     According to Motoaki Saito, M.D.,  President and CEO of TeraRecon,  "We are
pleased to be working with Imatron on this  significant  enhancement to electron
beam tomography technology. Our relationship with Imatron will certainly benefit
TeraRecon,  a newly formed,  high technology company, by aligning our innovation
with  Imatron's  superb  engineering  and physics,  and  furthering our goals in
real-time, reconstruction technology."

     TeraRecon  Inc., a  privately-held  company  based in South San  Francisco,
produces  high  speed,  image  processing  devices  and  software,  specifically
designed for CT, MRI and  Ultrasound.  The Company  bases its  real-time,  image
reconstruction  systems on an array of unique, high speed, HISC microprocessors.
These  microprocessors  reconstruct  the  data,  which is  transferred  from the
Ultrafast CT scanner  through a fiber optic cable.  TeraRecon holds an exclusive
license  to  use  HISC   microprocessors   in  the  field  of  medical   imaging
reconstruction.  HISC  technology is the advanced  form of the newly  introduced
VLIW  chip  architecture.   The  sixteen  HISC  microprocessor   chips  used  in
TeraRecon's RTR-2000 perform 115.2 billion operations per second - significantly
faster than VLIW microprocessor chips.

     Imatron Inc. is primarily engaged in designing, manufacturing and marketing
high  performance  computed  tomography  (CT)  scanners  based on the  Company's
proprietary  scanning electron beam technology.  Ultrafast CT(R) is a registered
trademark  of  Imatron.  Imatron's  Ultrafast  CT scanner is now in use at major
medical centers around the world, including The Mayo Clinic, University of Iowa,
National  Institutes  of  Health,  UCLA,  Stanford  University,   University  of
Illinois,  The Royal Brompton  Hospital in London,  Tokyo  University  Hospital,
Beijing  Hospital,  as well as many  other  major  hospital  centers.  Imatron's
HeartScan  Imaging  Inc.   subsidiary  provides  Coronary  Artery  Disease  Risk
Assessment diagnostic services in a nationwide network of Company-owned clinics.

     Except  for  the  historical  information  contained  herein,  the  matters
discussed in this news release may contain  forward-looking  statements that are
based on current  expectations and estimates about the industry in which Imatron
operates, the estimated impact of certain technological  advances, the estimated
impact of published research studies on scanner sales and procedures, as well as
management's  beliefs and assumptions.  Words such as "expects,"  "anticipates,"
"intends,"  "plans,"  "believes,"  "estimates,"  variations  of such  words  and
similar expressions are intended to identify such forward-looking statements. It
is important to note that the Company's  actual results could differ  materially
from those projected in such forward-looking  statements. The factors that could
cause actual results to differ materially include, among others: failed clinical
demonstration  of  certain  asserted  technological  advantages  and  diagnostic
capabilities;  reliance on product  distributors;  competition in the diagnostic
imaging market;  failure to improve product reliability or introduce new product
models and  enhancements;  delays in  production  and  difficulty  in  obtaining
components and sub-assemblies from limited sources of supply;  inability to meet
cash-on-delivery or prepayment terms from vendors;  determinations by regulatory
and  administrative  government  authorities;  patent  expiration  and denial of
patent  applications;  the high cost of the scanner as compared to  commercially
available  CT  scanners;  and the risk  factors  listed from time to time in the
Company's Securities and Exchange Commission reports, including their reports on
Form 10-K for their current fiscal year.


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