EXHIBIT 10.57


                          AGREEMENT FOR SERVICE SUPPORT

THIS AGREEMENT (this "Agreement") is made and entered into as of this ___ day of
February,  1997,  by and  between  SIEMENS  MEDICAL  SYSTEMS,  INC.,  a Delaware
corporation,  doing business at 186 Wood Avenue South,  Iselin, New Jersey 08830
(hereinafter  referred to as "Siemens Medical Systems" or "Siemens") and IMATRON
INC., a New Jersey  corporation,  doing business at 389 Oyster Point  Boulevard,
South San Francisco, California 94080 (hereinafter referred to as "Imatron").

                                    RECITALS

WHEREAS,  Imatron is the manufacturer of the Imatron C-150 (hereinafter referred
to  as  the  "Imatron  C-150")   product,   and  pursuant  to  a  Memorandum  of
Understanding  dated March 31, 1995 (the "Memorandum of  Understanding"),  sells
and  supplies  for  resale  the same to Siemens  Medical  Systems,  and to other
companies  which are  affiliates of Siemens  Medical  Systems  (Siemens  Medical
Systems and its affiliates are hereinafter  sometimes referred to as the"Siemens
Companies"; and

WHEREAS,  pursuant to the Memorandum of  Understanding,  Siemens Medical Systems
has exclusive rights  commencing  April 1,  1995, and continuing  thereafter for
three years, to market, sell, distribute,  service and support the Imatron C-150
product  (including  present  and  future  versions,  generations,  derivatives,
modifications, enhancements and improvements, and
upgrades   thereto)  in  the   Territory,   as  defined  in  the  Memorandum  of
Understanding,  and the Siemens  Companies are engaged in the  marketing,  sale,
distribution, service and support of the Imatron C-150 in the Territory; and

WHEREAS,  Siemens  Medical Systems desires to contract with Imatron for services
as described in this  Agreement,  with respect to and  including  Imatron  C-150
hardware and software,  such  services to be provided to the Siemens  Companies,
their designated respective customer/end-users,  and their respective personnel,
with respect to the Imatron  C-150  ("Services"),  in the Territory on the terms
and conditions set forth in this Agreement, and

WHEREAS,  Imatron is willing to provide  such  Services in the  Territory to the
Siemens Companies and their  customers/end-users  of the Imatron C-150, upon the
terms and conditions set forth in this Agreement;

NOW,   THEREFORE,   in  consideration  of  the  mutual  promises  and  covenants
hereinafter set forth, it is mutually agreed by the Parties as follows:

DEFINITIONS.

     The following  defined terms wherever used in this Agreement shall have the
     following  respective  meanings unless  indicated  otherwise by the context
     where the respective term is used:

          "Customer"  or  "customer/end-user"  (singular  or  plural)  are  used
          interchangeably and mean the named customer or end-user of the Imatron
          C-150  unit  who has  rightful  possession  of and is  engaged  in the
          operation and use of said Imatron C-150 unit. Attachment A, as amended
          from  time  to  time,  sets  forth  the  names  of  those   designated
          customers/end-users  of  the  respective  Siemens  Companies  to  whom
          Imatron  shall  provide  assistance  and  services as provided in this
          Agreement  and  the  respective  related  purchase  orders  and  other
          agreements   referred   to  in  this   Agreement.  

EXISTING  IMATRON OBLIGATIONS.


          Nothing  contained  herein or in any subcontract or purchase order for
          services  to Imatron  by a Siemens  Company  is  intended  to or shall
          operate to amend,  alter or affect,  reduce or limit the liability and
          obligations of Imatron under the Memorandum of  Understanding  for the
          Imatron  C-150  products,  or under any and all Imatron  warranties as
          manufacturer and supplier of the Imatron C-150 products against errors
          or defects in design, material and workmanship,  or as provided in the
          Memorandum of  Understanding  that the Imatron C-150 products shall be
          delivered  ready for commercial  sale and shall meet all  governmental
          and regulatory  requirements in the U.S.A., Canada, and Europe and ISO
          9001,  IEC-601-1-2,   CE  and  EMC.  Further,   Imatron  confirms  its
          obligation  contained in the Memorandum of Understanding  that Imatron
          shall upon request of Siemens,  provide  Siemens and its customers and
          end-users  with  full  repair,  service,   replacement,   support  and
          maintenance  for the  life of the  product  at a fair  and  reasonable
          price.  Imatron  agrees  that  the  price  for a one year  labor  only
          warranty  agreement  with  coverage   commencing  upon  completion  of
          installation shall not exceed US$65,000 per machine and the price of a
          one year full  service  agreement  shall  not  exceed  US$130,000  per
          machine. The foregoing prices shall be effective for a one year period
          from the Effective Date.

          Nothing  contained  herein is intended  to or shall  operate to amend,
          alter or affect the rights and licenses, or obligations of Imatron and
          Siemens Medical Systems  pursuant to the Memorandum of  Understanding,
          with respect to patents,  copyrights,  know-how,  064 results,  or the
          results of the Collaborative  Research  described in the Memorandum of
          Understanding.

          It is expressly  agreed and  understood  that in addition to providing
          services, support (such as those related to hotline), assistance under
          this Agreement to Siemens Medical Systems,  Imatron shall provide such
          same  services,  support,  and  assistance  to each  of the  following
          Siemens  Companies,  who are intended as third party  beneficiaries of
          this Agreement:
                  Siemens Aktiengesellschaft
                  Siemens AG Osterreich
                  Siemens Nederland N.V.
                  Siemens S.A. (France)

          Each  of  the  foregoing   Siemens  Companies  shall  be  entitled  to
          (i)-request  and issue  purchase  orders to Imatron in the same manner
          and to the same extent as Siemens Medical  Systems,  i.e. the terms of
          such shall be at all times subject to the terms and conditions of this
          Agreement as amended from time to time by mutual written  agreement of
          Siemens Medical  Systems and Imatron,  and (ii-any claims and disputes
          between  such  Siemens  Companies  and  Imatron  shall be  resolved in
          accordance  with  the   arbitration   provisions  set  forth  in  this
          Agreement.  Any and all  correspondence,  invoices,  and  requests for
          payment shall be issued to such respective  Siemens Company requesting
          or ordering  such  services and  assistance,  in  accordance  with and
          subject to the terms of this  Agreement.  Imatron  agrees to  promptly
          advise  Siemens  Medical  Systems of (a)-the  status of any request of
          such Siemens  Companies and  particularly any requests or proposals by
          any persons for terms and conditions  which vary  materially  from the
          terms and conditions agreed to by Siemens Medical Systems and Imatron,
          (b)-any  payments  which may be more than  thirty  days past due to or
          from such Siemens Companies, and (c)-any claims and disputes with such
          Siemens  Companies;  and  Siemens  Medical  Systems  agrees  to assist
          Imatron and such Siemens Companies in resolving outstanding claims and
          disputes  including but not limited to any relating to payments  which
          are past due.

SUPPORT FUNCTIONS; HOTLINE.

          In  order  to  enable  the  respective  Siemens  Companies   personnel
          (including the respective  Siemens Companies' Field Services Engineers
          ("FSE"  or  "Siemens  FSE"))  and the  respective  designated  Siemens
          Companies'  Imatron  C-150  customers/end-users  in the  Territory  to
          obtain prompt  response to any Imatron C-150  related  questions,  and
          prompt  warranty or other Imatron C-150 product  service,  as the case
          may  be,  Imatron  agrees  to put in  place  upon  execution  of  this
          Agreement and maintain at all times, a hotline  telephone  number,  24
          hours a day, seven days a week, including holidays.

          All  escalated  service  calls from the Siemens FSE may be directed to
          such  24  hour  hotline.   The  respective  Siemens  Companies'  field
          organizations  may at all times utilize Imatron's 24 hours hotline for
          assistance and support in the  installation  of Imatron C-150 products
          at such Siemens Companies' designated  customer(s) site(s) and support
          of such customer(s)/end-user(s). Imatron agrees to promptly respond to
          any and all technical  questions  and/or inquiries  regarding  Imatron
          C-150 products and assist Siemens FSE in the diagnosis and/or analysis
          of any  product  problems.  Further,  Imatron  agrees  to  immediately
          respond  to any  questions  from  the  respective  Siemens  Companies'
          personnel  and/or   respective   Siemens   Companies'   Imatron  C-150
          designated  customer/end-users  regarding  operation and/or use of the
          Imatron  C-150  product;   Imatron  agrees  to  promptly  assist  such
          customer/end-users  with any  problems  experienced  with the  Imatron
          C-150 and promptly  diagnose and provide,  at agreed upon prices,  any
          application support which may become necessary.

          At Siemens' request,  Imatron agrees to maintain and make available to
          Siemens all records  related to the delivery of services,  charges (if
          any),  repair,  support and  maintenance,  under this Agreement to the
          designated customer/end-user.

          Imatron agrees to immediately add 1 fully trained and qualified person
          to the existing 9 Imatron  service and  application  support  staff at
          Imatron's  South San Francisco  facility.  Imatron agrees to add other
          qualified and trained  personnel as may  reasonably be necessary  from
          time to time to service additional  customer(s)/end-users  added under
          this Agreement or because of increased demand for assistance, services
          and support under this Agreement.

          For the hotline support function  (Sections 3.1 to 3.3) (which will be
          accounted  for on a twelve month basis from January 1 to December 31),
          each   Siemens    Company    (with    respect   to   its    designated
          customers/end-users)  shall pay Imatron US $8,000 per year (12 months)
          for each Imatron C-150 unit sold and installed to date and hereinafter
          sold and  installed by Siemens.  Such sum of US $8,000 shall be due on
          April 1, 1997, for each of the C-150 units  installed on the date this
          Agreement is signed;  if any  additional  Imatron C-150 unit(s) is/are
          added  during the first  twelve  months  after the  execution  of this
          Agreement,  such US$8,000 shall be adjusted proportionately to reflect
          the actual number of months of hotline  service  provided with respect
          to such additional  unit(s);  after the initial twelve months said sum
          shall thereafter be due on December 1 for each year (12 month period),
          in the same  manner,  per  Imatron  C-150 unit for which such  hotline
          service is requested by Siemens and provided by Imatron.

STANFORD UNIVERSITY.

          Stanford  University  has a newly  installed  Imatron C-150 unit.  The
          Siemens  warranty to Stanford  commences  in September  1996.  Imatron
          agrees to  perform  all  warranty,  repair,  support  and  maintenance
          obligations  agreed to be  provided by Siemens to  Stanford,  bear all
          cost and expenses (including labor costs and charges,  costs of parts,
          freight, shipment,  installation,  costs of repairs), and warrant such
          work for 12 months.  The price for Imatron to perform all of such work
          is US$40,000 which shall be paid to Imatron by Siemens within ten days
          after the signing and execution of this Agreement by the parties.


INSTALLATION ASSISTANCE AND SERVICES.

          Imatron  agrees  to  provide  the  respective  Siemens  Companies  and
          customers/end-users  with services and assistance in the  installation
          of  the  Imatron  C-150  as  well  as  the  application   training  of
          customer/end-user   personnel,   at  customer/end-user  site,  in  the
          Territory.  The price that shall be paid to Imatron for providing such
          installation and application training is as follows:

Pre-Installation Site Planning

               Imatron,  for a fee of $5,000  plus  travel and living  expenses,
               will provide site  oversight,  power and magnetic  field testing,
               and  site  measurement  verification  (one  visit).  One  set  of
               preliminary      drawings,      ongoing      planning     review,
               architect/contractor  phone support and one pre-installation site
               sign off visit.  The fee shall be due and payable to Imatron upon
               delivery by Imatron of the preliminary planning document set.

               Where Imatron does the entire  installation  and training without
               any Siemens FSE  participating  (i.e.,  Imatron provides all site
               review prior to installation,  installation,  training,  services
               and  assistance   associated  with  installation,   testing,  and
               acceptance by the customer/end-user),  the total price to be paid
               by Siemens to Imatron for such services with respect to each such
               C-150 unit shall be the sum of the following:

               US$40,000 (including all travel and all other out-of-pocket costs
               and expenses) (pre-Application).

               US$8,000  (Application  - at least two full  weeks)  plus  actual
               travel  costs not to exceed  the cost of coach air travel and per
               diem expenses of $200.00 (domestic) and $300.00 (international).

               US$4,000  (Application one full week follow-up within six months)
               plus  actual  travel  costs not to  exceed  the cost of coach air
               travel and per diem  expenses of $200.00  (domestic)  and $300.00
               (international).

               Imatron  shall be  provided  with a purchase  order  prior to the
               commencement  of any  services.  Payment for services will be due
               upon completion.

               Where a  Siemens  FSE  participates  in the  installation  and/or
               training,  and/or  in site  review  prior  to  installation,  and
               performs  services and assistance  associated with  installation,
               training,  testing,  acceptance by  customer/end-user:  the total
               price (in addition to the fees for pre-installation site planning
               as  provided  above) for such  services  to be paid by Siemens to
               Imatron  with respect to each such C-150 unit shall be the sum of
               the following:

               US$25,000 (including all travel and other out-of-pocket costs and
               expenses) (pre-Application).

               US$8,000  (Application  - at least two full  weeks)  plus  actual
               travel  costs not to exceed  the cost of coach air travel and per
               diem expenses of $200.00 (domestic) and $300.00 (international).

               US$4,000  (Application one full week follow-up within six months)
               plus  actual  travel  costs not to  exceed  the cost of coach air
               travel and per diem  expenses of $200.00  (domestic)  and $300.00
               (international).

               Imatron  shall be  provided  with a purchase  order  prior to the
               commencement  of any  services.  Payment for services will be due
               upon completion

TRAINING.

               Imatron will make available in scheduled C-150 training classes a
               minimum of one position in classes meeting a minimum size
               of two students.

               A charge of $2,000  per week or  portion  of a week per  student.
               Minimum of five (5) weeks.  Cancellations  accepted  for four (4)
               weeks in advance of start date  without  penalty.  Fifty  percent
               (50%) of tuition  shall be paid if any student  cancels with less
               than four (4) weeks  notice.  Imatron  shall be  provided  with a
               purchase order prior to the commencement of any services. Payment
               for services will be due upon completion

               If Imatron  enters  into a  maintenance  agreement  for  warranty
               and/or annual maintenance within 12 months from the completion of
               the training,  Imatron will rebate the tuition to the contracting
               organization on the service agreement.

TRAINED AND QUALIFIED PERSONNEL.

               Imatron represents and warrants to each of the respective Siemens
               Companies  that all  Imatron  services  to be  provided  to it in
               accordance  with  this  Agreement  shall  be  provided  by  fully
               trained,  experienced  and  technically  qualified  personnel  of
               Imatron who are familiar with the Imatron C-150 product,  and who
               are  qualified to carry out the  service,  repair,  support,  and
               maintenance  thereof in  accordance  with the  highest  standards
               observed  in the  industry  with  respect to  comparable  medical
               imaging products.


SIEMENS CUSTOMER RELATIONSHIP.

               At the point  Imatron is  successful  in  obtaining  a 90 percent
               penetration of eligible sites for maintenance agreements, Imatron
               will reduce the cost  associated with the Help Desk "Hot Line" to
               $6,000 per machine, per year for hotline support.

               Imatron represents and warrants to each of the respective Siemens
               Companies  that  it will  promptly  notify  it of any  complaints
               received  from  its  customers/end-users   with  respect  to  any
               products  or  services  described  in  this  Agreement.   Imatron
               personnel  will refrain from any acts which may adversely  affect
               the business  relationship  between such Siemens  Company and its
               customers/end users.

 CONFIDENTIAL AND PROPRIETARY INFORMATION.

               No right or license is granted by this  Agreement to Imatron with
               respect to any confidential or proprietary information of Siemens
               Companies.  The Siemens Companies  respectively retain all right,
               title and interest in and to all of their respective confidential
               and proprietary information.

               No right or license is granted to Imatron by this Agreement under
               any patents,  copyrights,  other intellectual property rights, or
               trademarks of the Siemens  Companies.  Imatron shall not make any
               use of any trademarks  (including tradenames or service marks) of
               the Siemens  Companies in any manner,  without the prior  written
               consent of the Siemens Companies.

               Any  news  release,   public  announcement,   advertisement,   or
               publicity  proposed to be  released by any party with  respect to
               this  Agreement  or the  discussions  and pursuits of the parties
               pursuant  to  this  Agreement  shall  be  subject  to  reasonable
               opportunity to review by the other parties prior to release.  All
               matters discussed between the parties including their discussions
               and progress shall be maintained in confidence by the parties.

               Imatron  agrees to receive and maintain in  confidence  for three
               years after first receipt thereof pursuant to this Agreement, any
               and  all  confidential   information  disclosed  by  the  Siemens
               Companies to Imatron; provided that such confidential information
               shall  be so  identified  in  advance  as  such  by  the  Siemens
               Companies,  and provided further that Imatron's obligations shall
               not apply to any  information  that:  (i)-Is in the public domain
               through no act or omission by Imatron,  its employees,  agents or
               others working on its behalf;  (ii)-Is demonstrated by Imatron to
               have been independently developed by Imatron (or by a third party
               and  lawfully  disclosed  to  Imatron);  or  (iii)-Is  rightfully
               received  by Imatron  from third  parties  who were  entitled  to
               receive and transfer the information.

TERM AND TERMINATION.

               The initial  term of this  Agreement  shall  commence on April 1,
               1997 (the "Effective Date"), and shall continue  thereafter until
               March  31,  1998.   This  Agreement  may  be  renewed  by  mutual
               agreement,  for an  additional  renewal  term  of 12  months,  by
               delivery of written notice of Siemens'  intentions to Imatron, no
               later than 3 months prior to the expiration of the initial term.

               Any party to this  Agreement  shall  have the right to  terminate
               this Agreement as follows:

               Upon any material  breach of this Agreement or any purchase order
               pursuant to this Agreement,  the non-breaching party may elect to
               terminate  this  Agreement  by  delivery  of ninety  days  notice
               specifying  such breach and giving notice of intent to terminate;
               if such breach is cured within the ninety days, such notice shall
               expire and have no further  effect;  if such  breach is not cured
               within the ninety days, this Agreement shall expire and terminate
               at the end of the ninety days;

               Upon any filing in  bankruptcy  or  insolvency by or inability of
               Siemens  Medical  Systems or Imatron  to meet its  liability  and
               obligations  to its  creditors;  commencement  by  any  of  these
               parties  of any  proceedings  or any  decision  by it to wind up,
               liquidate, and/or dissolve or indefinitely suspend or discontinue
               its  conduct  of the  business  which  is  the  subject  of  this
               Agreement,  or the  appointment of a trustee or receiver over the
               assets or business of any of these parties,  then the other party
               may elect to  terminate  this  Agreement  by  delivery of written
               notice to the other parties; or

               Upon any  change in  ownership  or  control  of  Siemens  Medical
               Systems or Imatron by merger with or acquisition by a third party
               of a  substantial  portion of the voting  shares of such party or
               the  assets  of such  party,  then the  other  party may elect to
               terminate this Agreement by delivery of written notice.

               Companies terminating or renewing this Agreement.

INDEMNIFICATION.

               Imatron agrees to defend the Siemens  Companies against any third
               party  claims  and  indemnify  and  hold  the  Siemens  Companies
               harmless from any costs,  expenses,  losses or damages  resulting
               therefrom,  alleging injury to tangible personal  property,  real
               property, or personal injury as a result of any acts or omissions
               of  Imatron  in  the   performance   of  the  support,   service,
               installation,  repair,  warranties and maintenance of the Imatron
               C-150 product pursuant to this Agreement.

               Imatron  agrees  to  indemnify  and  hold the  Siemens  Companies
               harmless  from any damages or losses to Imatron C-150 units owned
               by the Siemens Companies, resulting from any acts or omissions of
               Imatron in the  performance  of the  support,  service,  repairs,
               warranty and maintenance pursuant to this Agreement.

               Siemens agrees to defend  Imatron  against any third party claims
               and indemnify and hold Imatron harmless from any costs, expenses,
               losses  or  damages  resulting  therefrom,   alleging  injury  to
               tangible  personal  property,  real property,  or personal injury
               (i) as  a result  of any  acts or  omissions  of  Siemens  in the
               performance  of  the  support,  service,  installation,   repair,
               warranties and  maintenance of the Imatron C-150 product prior to
               the  commencement of Imatron service  pursuant to this Agreement,
               or  (ii) as a result of any  obligations  incurred  by Siemens to
               customers  or end users  beyond  those  specifically  assumed  by
               Imatron pursuant to this Agreement.

               Any and all notices  required to be given  hereunder  shall be in
               writing  and  shall be  deemed  made or  given  if  (a) delivered
               personally in hand, (b) sent first class mail postage prepaid, or
               (c) sent  by  international   commercial  courier  for  next  day
               delivery, addressed as follows:

         If to Siemens Medical Systems:  Siemens Medical Systems, Inc.
                                                  186 Wood Avenue South
                                                  Iselin, New Jersey 08830
                                                  Attention:  Diane Cerny

         If to Imatron:                           Imatron Inc.
                                                  389 Oyster Point Boulevard
                                                  South San Francisco, CA 94080
                                                  Attention:  President

               or to such other  addresses as a party may determine from time to
               time, by notice given in the same manner.


MISCELLANEOUS.

               The parties are independent  contractors.  None of the parties is
               the  agent or  representative  of the  other  party.  None of the
               parties is authorized to enter into any agreement on behalf of or
               to bind the other party to any  obligation or agreement.  None of
               the parties shall attempt to enter into any  obligation on behalf
               of the other party or to bind it to any agreement or undertaking

APPLICABLE LAW; ARBITRATION.

               This Agreement  shall be interpreted  and construed in accordance
               with the laws of the State of New York, U.S.A.

               This  Agreement may not be modified or amended  except in writing
               by a document  setting  forth the intent of the  parties to amend
               this Agreement.  Rights and obligations  under this Agreement may
               not be waived or released  except in writing by mutual  agreement
               of the parties.

               In the event any purchase  order,  acceptance,  or other document
               pursuant  to  this  Agreement   contains   preprinted  terms  and
               conditions,   such  preprinted  terms  and  conditions  shall  be
               disregarded and shall be deemed excluded.

               This Agreement  supersedes all prior  discussions,  negotiations,
               understandings,  and agreements, written or oral, with respect to
               the subject matter hereof.

               Any and all claims, disputes and controversies which may arise at
               any time relating to this Agreement, including without limitation
               its interpretation, enforceability, or breach, or with respect to
               any confidential information disclosed pursuant to this Agreement
               or  breach  of  confidentiality,  which  are not  resolved  by an
               amicable  effort of the  parties,  shall be finally  resolved  by
               binding   arbitration  to  be  conducted  pursuant  to  a  strict
               confidentiality agreement in Denver, Colorado, in accordance with
               the International  Arbitration Rules of the American  Arbitration
               Association,  by the American Arbitration Association ("AAA"), by
               three   impartial   arbitrators,   one   appointed   by   Siemens
               Aktiengesellschaft,  one  appointed by Imatron,  and the third by
               the two so  appointed.  Any vacancy  unfilled  within thirty days
               shall be filled by the AAA.  The parties  agree to use their best
               reasonable  efforts to expedite the conduct and conclusion of the
               arbitration   proceedings.   The  award  of  a  majority  of  the
               arbitration  tribunal shall be final and binding, and judgment on
               the award may be entered or filed for enforcement  purposes by or
               against  a party in any court  having  proper  jurisdiction.  The
               arbitration  tribunal  may not award and no party  shall  seek to
               recover  or be  obligated  to  pay  an  award  of  consequential,
               incidental,  special,  punitive or exemplary damages or attorneys
               fees and costs  related to the same.  With respect to any and all
               claims,  disputes  and  controversies  which may arise under this
               Agreement,  Imatron  waives  any and all  rights or claims it may
               have  or  make  that  Siemens   Aktiengesellschaft,   Siemens  AG
               Osterreich,  Siemens  Nederland N.V., or Siemens S.A. (France) is
               subject to the jurisdiction of the courts of the United States of
               America or any of the states,  countries  or local  jurisdictions
               within the United States of America.

               This  Agreement and any  agreement  entered into pursuant to this
               Agreement,  including  any purchase  order for  service,  repair,
               support and maintenance,  may not be assigned or transferred to a
               third party in whole or in part without the prior written consent
               of all of the  parties  hereto and any  attempted  assignment  or
               transfer contrary to these provisions shall be null and void.

               Imatron  may not  delegate  or transfer  the  performance  of its
               obligations  hereunder  or  under  any  purchase  order  or other
               agreement  pursuant to this  Agreement to any third party without
               the prior written consent of Siemens, any assignment, transfer or
               delegation   shall  not  operate  to  release  Imatron  from  any
               liability  for the  performance  thereof in  accordance  with the
               terms and  conditions  hereof  and  thereof,  and  Imatron  shall
               continue to remain liable  therefor.  Any and all monies required
               to be paid hereunder  shall be paid in U.S.  dollars and remitted
               to such bank accounts, persons and addresses, as may be indicated
               by the payee party from time to time in writing.

               IN WITNESS WHEREOF,  the parties have entered into this Agreement
               on the dates set forth below, intending to be bound.

SIEMENS MEDICAL SYSTEMS, INC.                   IMATRON INC.

By:      ___________________________            By:      ______________________
Date:    ___________________________            Date:    ______________________






                                  ATTACHMENT A

                  Customer/               Country, Customer
Siemens Company   Customer/End-User       Address (Site)      Type(s) of Service