IMATRON INC
DEFS14A, 1999-09-29
ELECTROMEDICAL & ELECTROTHERAPEUTIC APPARATUS
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                                     IMATRON
                           389 OYSTER POINT BOULEVARD
                      SOUTH SAN FRANCISCO, CALIFORNIA 94080

                                   ----------


                    NOTICE OF SPECIAL MEETING OF SHAREHOLDERS

                                OCTOBER 29, 1999

                                   ----------


     TO THE SHAREHOLDERS OF IMATRON INC:

     NOTICE IS HEREBY GIVEN that a special meeting of shareholders (the "Special
Meeting")  of  Imatron  Inc.  (the  "Company")  will be  held  at the  Company's
headquarters at 389 Oyster Point Boulevard,  South San Francisco,  California on
October 29, 1999 at 9:00 a.m. for the following purposes:

         1. To ratify the sale of  securities  to the  Company's  President in a
            private placement transaction.

         2. To ratify the  appointment of KPMG LLP as the Company's  independent
            auditors for the fiscal year ending December 31, 1999.

         3. To  transact  such other  business as may  properly  come before the
            meeting or any adjournments thereof.

     The  foregoing  items of  business  are more fully  described  in the Proxy
Statement accompanying this Notice.

     Only  holders of the Common  Stock as of the close of  business  on Friday,
September 17, 1999 are entitled to notice of and to vote at the Special  Meeting
or any adjournments thereof.


                                        By Order of the Board of Directors,


                                        /s/ S. Lewis Meyer
                                        ------------------
                                        S. Lewis Meyer
                                        Chief Executive Officer


South San Francisco, California
September 27, 1999



- --------------------------------------------------------------------------------
         ALL SHAREHOLDERS ARE CORDIALLY INVITED TO ATTEND THE MEETING IN
         PERSON. HOWEVER, TO ASSURE YOUR REPRESENTATION AT THE MEETING,
          PLEASE MARK, SIGN, DATE AND RETURN THE ENCLOSED PROXY CARD AS
          SOON AS POSSIBLE IN THE POSTAGE-PREPAID ENVELOPE ENCLOSED FOR
             THAT PURPOSE. ANY SHAREHOLDER ATTENDING THE MEETING MAY
            VOTE IN PERSON EVEN IF SUCH SHAREHOLDER PREVIOUSLY SIGNED
                              AND RETURNED A PROXY.
- --------------------------------------------------------------------------------


<PAGE>

                                     IMATRON
                           389 OYSTER POINT BOULEVARD
                      SOUTH SAN FRANCISCO, CALIFORNIA 94080

                                   ----------

               PROXY STATEMENT FOR SPECIAL MEETING OF SHAREHOLDERS

                                OCTOBER 29, 1999


                                   ----------



     This Proxy Statement is being furnished to the holders of the Common Stock,
no par value per share (the "Common Stock"),  of Imatron Inc. (the "Company") in
connection with the  solicitation of proxies on behalf of the Board of Directors
of the  Company  for use at the  special  meeting  (the  "Special  Meeting")  of
shareholders of the Company to be held for the purposes described herein, and at
any  adjournment  or  postponements   thereof.  This  Proxy  Statement  and  the
accompanying  form of proxy are first being mailed to  shareholders  on or about
September 27, 1999.


                 INFORMATION CONCERNING SOLICITATION AND VOTING


VOTING SECURITIES; RECORD DATE

     Only  holders of the Common  Stock as of the close of business on September
17,  1999 (the  "Record  Date") will be entitled to notice of and to vote at the
Special Meeting or any  adjournments  thereof,  either in person or by proxy. At
the close of  business  on the  Record  Date,  there were  94,957,051  shares of
Imatron Common Stock outstanding,  each of which is entitled to one vote on each
matter properly coming before the Special Meeting.


REVOCABILITY OF PROXIES

     Any proxy given pursuant to this  solicitation may be revoked by the person
giving it at any time  before  its use by  delivering  to the  Secretary  of the
Company a written  notice of revocation or a duly executed proxy bearing a later
date or by attending the Annual Meeting and voting in person. Mere attendance at
the Annual Meeting will not serve to revoke a proxy.


QUORUM; ABSTENSIONS AND BROKER NON-VOTES

     Holders of Common  Stock are  entitled to one vote for each share of Common
Stock  held.  In order to  constitute  a quorum for  conduct of  business at the
Special  Meeting,  a majority of the shares of Common Stock  outstanding  on the
Record Date must be  represented  in person or by proxy at the Special  Meeting.
Votes cast by proxy or in person at the Special Meeting will be tabulated by the
election inspectors  appointed for the meeting who will determine whether or not
a quorum is present.  Shares  represented  by proxies that are marked  "abstain"
will be counted as shares present for purposes of determining  the presence of a
quorum on all matters.

     While brokers  holding shares for  beneficial  owners in "street name" must
vote those  shares  according  to specific  instructions  they  receive from the
owners,  brokers have  discretionary  authority  to vote on  "routine"  matters.
Absent  specific  instructions  from  the  beneficial  owners  in  the  case  of
"non-routine"  matters, the brokers may not vote the shares.  "Broker non-votes"
result when brokers are precluded from  exercising  their  discretion on certain
types of proposals.  Proposal 1,  ratification


<PAGE>

of  the  sale  of  securities  to  the  Company's  President  (the  "Transaction
Proposal") is considered a non-routine  matter whereas Proposal 2,  ratification
of the Company's accountants (the "Accountants Proposal") is considered routine.
Shares  that are  voted  by  brokers  on the  Accountants  Proposal  but not the
Transaction  Proposal  will  be  treated  as  shares  present  for  purposes  of
determining the presence of a quorum on both matters, but will not be treated as
shares entitled to vote at the Special  Meeting on the  Transaction  Proposal if
instructions to vote have not been provided by the owner.  Therefore, a properly
executed  proxy marked  "ABSTAIN" (or an abstention at the Special  Meeting) and
shares  represented  by  broker  non-votes  will  be  counted  for  purposes  of
determining  whether  there is a quorum at the Special  Meeting but will have no
effect on the ratification of the Transaction Proposal.


SOLICITATION

     The  Company  will bear the  entire  cost of  soliciting  proxies  from its
shareholders,  including  preparation,  assembly,  printing  and mailing of this
Proxy  Statement,  the proxy card and any  additional  information  furnished to
shareholders.  Copies of  solicitation  materials  will be  furnished  to banks,
brokerage  houses,  fiduciaries and custodians  holding in their names shares of
Common Stock  beneficially owned by others to forward to such beneficial owners.
Original  solicitation  of proxies  by mail may be  supplemented  by  telephone,
facsimile,  telegram or personal solicitation by representatives of the Company.
No additional  compensation will be paid to such persons for such services.  The
Company  has also  retained  the firm of DF King & Co.,  Inc.  to  assist in the
solicitation  of  proxies  at a cost of  approximately  $7,500  plus  reasonable
out-of-pocket expenses.


SHAREHOLDER PROPOSALS FOR NEXT ANNUAL MEETING

     Proposals  of  shareholders  that  are  intended  to be  presented  at  the
Company's  2000  Annual  Meeting  must be  received by the Company no later than
January  7,  2000 in order to be  included  in the  proxy  statement  and  proxy
relating to the meeting.


                                   PROPOSAL 1
          RATIFICATION OF SALE OF SECURITIES TO THE COMPANY'S PRESIDENT

BACKGROUND

     The Company is soliciting the  ratification  of a sale of its securities to
its  President,  Terry Ross (the  "Transaction").  Shareholder  ratification  is
necessary in order to comply with the listing  requirements  of the NASDAQ Stock
Market.   NASDAQ   regulations   generally  require   shareholder   approval  of
arrangements  pursuant  to which the  Company's  officers or  directors  receive
Company  securities,  unless the  securities  are  granted as an  inducement  to
acceptance of employment with the Company. Since the Transaction described below
occurred  while Mr. Ross was both an officer and a director of the Company,  the
Company is now seeking shareholder ratification of such Transaction.


DESCRIPTION OF TRANSACTION

     On August 10, 1999,  the Company  announced the  completion of a $3,025,000
private  placement to Terry Ross,  Imatron's  President.  In connection with the
sale,  made in part pursuant to  agreements  previously  entered  into,  Imatron
issued 3,767,713 shares of Common Stock, 360,000 5-year warrants to purchase its
Common Stock at $1.044 per share,  and 2,991,027 1-year warrants to purchase its
Common  Stock at  $1.003.  The  aggregate  purchase  price for the stock and the
warrants  was  $3,025,000.  The terms were  negotiated  at arms  length and were
approved by the  Company's  Board of Directors and by its Audit  Committee.  The
purchase  price per share was $0.84 and was  determined  based on a 10% discount
from the 10 day average closing bid price for the Company's  Common Stock during
the period from May 5, 1999 through May 17, 1999. The terms agreed upon


                                       2
<PAGE>

with Mr.  Ross  were  substantially  equivalent  to those  agreed  upon  with an
institutional  investor  for  an  investment  of  a  similar  amount.  When  the
institutional investor failed to close the agreed upon financing, the same terms
were offered to Mr. Ross who accepted  them.  The Company's  Board  believes the
terms are fair and  reasonable  as to the  Company.  The Common  Stock issued or
issuable to Mr. Ross is not entitled to preemptive  rights.  Pending approval of
the  Transaction  by  Imatron's  shareholders,  Mr. Ross has agreed not to sell,
transfer, assign or vote the shares of Common Stock.

     Imatron  intends  to use the  proceeds  from the  Transaction  for  general
corporate  purposes and working  capital.  Pursuant to the  Securities  Purchase
Agreement  between the Company and Mr. Ross,  the Company  filed a  Registration
Statement on Form S-3 covering the resale of the Common Stock issued or issuable
to Mr. Ross in the Transaction.

         If the  Company  fails to comply with  NASDAQ  regulations,  the Common
Stock may be delisted from the NASDAQ National Market System.

           NAME & POSITION                                 NUMBER OF SHARES
           ---------------                                 ----------------

     Terry L. Ross, President and Director.....................7,118,740*


- ----------
*  Includes  3,767,713  shares owned directly and 3,351,027 shares issuable upon
   the exercise of warrants that are exercisable as of June 15, 1999
- --------------------------------------------------------------------------------


REQUIRED VOTE

     Ratification  of the  Transaction  requires  the  affirmative  vote  of the
holders of a majority of the shares of Common Stock voting in person or by proxy
on this proposal at the Special Meeting.


       THE BOARD OF DIRECTORS RECOMMENDS A VOTE "FOR" THE RATIFICATION OF
                THE SALE OF SECURITIES TO THE COMPANY'S PRESIDENT


                                   PROPOSAL 2
               RATIFICATION OF APPOINTMENT OF INDEPENDENT AUDITORS

     The  Board  has  selected  KPMG  LLP,  independent  auditors,  to audit the
financial  statements  of the Company for the fiscal  year ending  December  31,
1999.  KPMG LLP has  audited  the  Company's  financial  statements  since 1997.
Representatives  of KPMG LLP are  expected to be present at the Special  Meeting
and will have an  opportunity  to make a statement  if they desire to do so, and
are expected to be available to respond to appropriate questions.


REQUIRED VOTE

     The  affirmative  vote of the holders of a majority of the shares of Common
Stock  voting in person or by proxy on this  proposal at the Special  Meeting is
required to ratify the appointment of the independent auditors.


            THE BOARD RECOMMENDS A VOTE "FOR" THE RATIFICATION OF THE
                 APPOINTMENT OF KPMG LLP AS INDEPENDENT AUDITORS


                                       3
<PAGE>

            INTERESTS OF CERTAIN PERSONS IN MATTERS TO BE ACTED UPON

     Terry Ross has been a director of the Company  since  January  1987 and was
appointed  President  on January  1, 1999.  Prior to the  Transaction  Mr.  Ross
beneficially  owned  101,250  shares  of  the  Company's  Common  Stock.  If the
Transaction  Proposal is  ratified,  Mr. Ross will  beneficially  own  7,444,990
shares, or approximately  7.5% of the Company's issued and outstanding shares of
Common Stock as of September 10, 1999.


         SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT

     The following table,  based in part upon information  supplied by officers,
directors and principal  shareholders,  set forth certain information  regarding
the ownership of the Company's voting securities as of September 10, 1999 by (i)
all those known by the Company to be beneficial owners of more than five percent
of any class of the Company's voting securities;  (ii) each director; (iii) each
named executive  officer;  and (iv) all executive  officers and directors of the
Company as a group.  Unless  otherwise  indicated,  each of the shareholders has
sole voting and investment power with respect to the shares  beneficially owned,
subject to community  property laws where  applicable.  Beneficial  ownership is
determined  in  accordance  with  the  rules  of  the  Securities  and  Exchange
Commission. In computing the number of shares beneficially owned by a person and
the percentage  ownership of that person,  shares subject to options or warrants
held by that person that are currently exercisable or exercisable within 60 days
of September 10, 1999 are deemed outstanding.  Applicable  percentage  ownership
for each shareholder is based on 94,933,749  shares  outstanding as of September
10, 1999.


SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT(1)

<TABLE>
<CAPTION>

                            NAME AND  ADDRESS OF           AMOUNT OF DIRECT
TITLE OF CLASS                 BENEFICIAL OWNER         BENEFICIAL OWNERSHIP(2)         PERCENT OF CLASS(3)
- --------------              --------------------        -----------------------         ----------------

<S>                   <C>                                     <C>                             <C>
Common                Marukin Corporation(4)                   5,471,617                       5.8%
Common                Douglas P. Boyd                          2,074,553(5)                    2.2%
Common                John L. Couch                               35,125(6)                      *
Common                William J. McDaniel, M.D.                   82,500(7)                      *
Common                S. Lewis Meyer                             644,158(8)                      *
Common                Terry Ross                               7,444,990(9)                    7.5%
Common                Aldo Test                                  126,250(10)                     *
Common                All Directors and                       10,407,576(11)                  11.0%
                      Executive Officers as a Group
</TABLE>


- ----------

  *  Does not exceed 1% of the referenced class of securities.

(1)  Security  ownership   information  for  beneficial  owners  is  taken  from
     statements  filed with the Securities and Exchange  Commission  pursuant to
     Sections 13(d), 13(g) and 16(a) and information made known to the company.

(2)  Ownership is direct unless indicated otherwise.

(3)  Calculation  based on 94,933,749  shares of Common Stock  outstanding as of
     September 10,1999.

(4)  Marukin Corporation, 6, Rokuban-Cho Chiyoda-Ku, Tokyo 10

(5)  Includes  2,055,801  shares owned directly and 18,752 shares  issuable upon
     the exercise of stock options that are exercisable as of September  10,1999
     or that will become exercisable within 60 days thereafter.

                                       4
<PAGE>

(6)  All  shares  are  issuable  upon the  exercise  of stock  options  that are
     exercisable as of September 10,1999 or that will become  exercisable within
     60 days thereafter.

(7)  Includes  20,000 shares owned directly and 62,500 shares  issuable upon the
     exercise of stock options that are  exercisable as of September  10,1999 or
     that will become exercisable within 60 days thereafter.

(8)  Includes  619,158 shares owned directly and 25,000 shares issuable upon the
     exercise of stock options  exercisable as of September 10,1999 or that will
     become exercisable within 60 days thereafter.

(9)  Includes 3,844,163 shares owned directly,  150,000 shares issuable upon the
     exercise of stock options and 3,451,027  shares  issuable upon the exercise
     of  warrants,  exercisable  as of  September  10,1999  or that will  become
     exercisable within 60 days thereafter.

(10) Includes  20,000 shares owned directly and 106,250 shares issuable upon the
     exercise of stock options  exercisable as of September 10,1999 or that will
     become exercisable within 60 days thereafter.

(11) Percentage  of beneficial  ownership  assumes the exercise of the aforesaid
     options by officers and directors.

                             EXECUTIVE COMPENSATION


SUMMARY COMPENSATION OF NAMED EXECUTIVES

     The Summary Compensation Table shows certain  compensation  information for
each person who served as Chief Executive  Officer during the year and the other
most highly compensated executive officers whose aggregate compensation exceeded
$100,000  for  services  rendered  in all  capacities  during  fiscal  year 1998
(collectively  referred to as the "Named  Executive  Officers"),  as well as Mr.
Ross, who was appointed President on January 1, 1999. Compensation data is shown
for the fiscal years ended December 31, 1998, 1997 and 1996 except for Mr. Ross,
for  whom  data is shown  for the 1999  fiscal  year to date.  This  information
includes the dollar value of base  salaries,  bonus awards,  the number of stock
options  granted,  and  certain  other  compensation,  if any,  whether  paid or
deferred.

<TABLE>
<CAPTION>
                           SUMMARY COMPENSATION TABLE
- --------------------------------------------------------------------------------------------------------------
                                                                            LONG TERM
                                                                          COMPENSATION
                                               ANNUAL COMPENSATION           AWARDS
                                                                            OPTIONS/            ALL OTHER
NAME AND PRINCIPAL POSITION          YEAR   SALARY($)(A)     BONUS            SARS           COMPENSATION(B)
- ---------------------------          -----  ------------    -------     ----------------   ------------------

<S>                                  <C>       <C>            <C>           <C>                   <C>
Douglas P. Boyd                      1998      182,000        -0-            75,008(c)            4,750
  Chairman of the                    1997      174,300                                            4,750
  Board                              1996      166,000                                            4,700

S. Lewis Meyer                       1998      234,000        -0-           100,000(c)            4,750
  Chief Executive                    1997      221,500                                            4,750
  Officer                            1996      211,000                       75,000(d)            4,750

Gary H. Brooks                       1998      144,000        -0-            50,000(c)            4,320
  Vice President and                 1997      137,000                                            4,020
  Chief Financial                    1996      131,000                       40,000(e)            3,880
  Officer (through
  8/31/99)

Terry Ross                           1998      -0-(f)         -0-              -0-                 -0-
  President
- --------------------------------------------------------------------------------
</TABLE>


                                       5
<PAGE>

(a)  Amounts shown include cash and non-cash compensation earned with respect to
     the year shown above.

(b)  Represents the Company's matching contributions to its 401(k) plan.

(c)  Represents  options  granted by the Board of Directors on February 24, 1998
     at 100% of the closing price of a share of Company stock on that date,  and
     subsequently repriced and regranted on October 23, 1998.

(d)  Represents   portion  of  a  $75,000   bonus  payable  to  Mr.  Meyer  upon
     commencement of his employment with the Company.

(e)  Represents  options  granted in March 1996 under the  Company's  1993 Stock
     Option Plan.

(f)  Mr. Ross was appointed  President on January 1, 1999. Pursuant to Mr. Ross'
     employment agreement,  he receives an annual base salary of $200,000 and an
     annual  commission  in the  amount of 0.5% of  product  and  upgrade  sales
     revenue paid monthly.


INCENTIVE AND REMUNERATION PLANS

     1987 STOCK BONUS  INCENTIVE  PLAN. In 1988 the  shareholders of the Company
approved the adoption of a Stock Bonus  Incentive Plan ("Stock Bonus  Plan").The
Stock Bonus Plan was adopted to reward  participants  for past  services  and to
encourage  them to remain in the  Company's  service.  The Stock  Bonus Plan was
amended  and  restated  by  the  Board  in  1996,  and  is  administered  by the
Compensation  Committee of the Board of Directors  which  presently  consists of
Messrs. Test and Admiral McDaniel.  The Committee has exclusive authority to act
on  the  following  matters:   selection  of  the  persons  among  the  eligible
participants (which consists of all employees,  including officers and directors
of the Company,  and  consultants  to the Company) who are to participate in the
Stock  Bonus  Plan;  the  determination  of  each   participant's   stock  bonus
opportunity  and actual  bonus;  changes in the Plan,  and all other actions the
Committee deems necessary or advisable to administer the Plan.

     The total  number of shares of Common  Stock which may be issued  under the
Stock Bonus Plan is 2,200,000  shares with no more than 400,000 shares available
for issuance in any single calendar year.

     In addition,  the  Compensation  Committee has authorized  additional bonus
opportunities  for  participants  based on the  participant  achieving  specific
corporate objectives. The bonus opportunity for each participant is expressed as
a percentage  of base salary,  with a maximum bonus  opportunity  of 40% of base
salary.  After  the end of each  fiscal  year,  the  Committee  determines  each
participant's bonus award in dollars. The number of shares of Common Stock to be
issued is  determined by dividing the bonus award by the closing stock price for
the Common Stock on the grant date.

     No participant is eligible to receive a bonus award unless such participant
is either  employed  by the  Company or  providing  consulting  services  to the
Company on the last day of the calendar year to which the bonus relates.

     During the 1998 fiscal year 285,250  shares were  granted to all  employees
under  the  Stock  Bonus  Plan of which no  shares  were  granted  to any  Named
Executive Officer.


STOCK PARTICIPATION AND OPTION PLANS

     1994 EMPLOYEE  STOCK  PURCHASE  PLAN.  In 1993 the  directors  approved the
adoption of the 1994 Employee  Stock  Purchase  Plan (the "Plan").  The Plan was
approved by the  shareholders  at the 1994 Annual  Meeting and became  effective
January 1, 1994. All employees, including Named Executive Officers, may purchase
shares of the Company's  Common Stock at a discount of 15% from the market price
of the shares. The plan replaced the Company's 1984 Employee Stock Participation
Plan which  expired  January 17,  1994.  The Plan is  intended to qualify  under
Section  423 of the  Internal  Revenue  Code of 1986,  but is not subject to the
provisions of ERISA.
                                       6
<PAGE>

     The  maximum  aggregate  number of shares to be  offered  under the Plan is
2,300,000 shares of the Company's  Common Stock.  The  shareholders  approved an
increase  in the  number of shares  issuable  under the Plan from  1,800,000  to
2,300,000 shares at the 1999 Annual Meeting. As of September 10, 1999, 1,631,972
shares of the Company's Common Stock have been issued under the Plan.

     All employees who are regular employees of the Company,  whose date of hire
is at least six months prior to the beginning of the Offering  Period or Interim
Offering Period, and who are customarily employed for at least 20 hours per week
and more than five months in any calendar  year are eligible to  participate  in
the Plan. The first Offering  Period began January 1, 1994 and ran through March
31, 1996.  The second  Offering  Period began April 1, 1996 and ran through June
30,  1998.  The  third  Offering  Period  began  July 1,  1998 and runs  through
September 30, 2000. Each Interim  Offering Period is a calendar  quarter.  As of
September 10, 1999, a total of 178 employees  met the  eligibility  requirements
under the Plan.

     Eligible  employees are offered the opportunity to purchase Common Stock by
means of  payroll  deductions  of 2%,  4%,  6%, 8% or 10% of  compensation.  The
specific percentage selected is at the employee's option, up to a yearly maximum
established  from time to time  (currently  established  at  $7,000) of the fair
market value of the Stock,  determined on the Offering  Date, and so long as the
participant  would not own 5% or more of the voting power of the Company's stock
following the purchase.  Each participant may begin participation in the Plan at
the  beginning  of the  Offering  Period or any  Interim  Offering  Period,  may
decrease but not increase  participation  during the  Offering  Period,  and may
terminate  participation  in the Plan  before  the end of any  Interim  Offering
Period, all subject to certain notice and filing requirements.

     Administration  of the  Plan is by the  Company's  Board,  or  Compensation
Committee by  delegation.  The Committee is comprised of at least two members of
the Company's Board, each of whom must be disinterested as defined in Securities
and Exchange Commission  regulations.  The Committee has the powers of the Board
pursuant to the Plan,  including the power to determine  questions of policy and
expediency that may arise in the  administration of the Plan, all subject to the
provisions of the Plan.  Members of the Committee  receive no  compensation  for
their services in connection with the administration of the Plan.

     The price for the shares purchased  pursuant to the Plan is equal to 85% of
the fair  market  value of the  shares on either the  Offering  Date (or date of
entry  for new or  re-enrolling  employees)  or the  last  day of  each  Interim
Offering  Period,  whichever is less. The funds  contributed by the  participant
earn no interest while they are being held by the Company.

     To  participate  in  the  Plan,   employees  must  submit  the  appropriate
documentation  authorizing  deductions from payroll in specified  amounts to the
Company prior to the Offering Period or Interim Offering Period.  Funds deducted
during the quarter are used to purchase  shares of the  Company's  Common Stock,
the  number of which is  determined  (in whole  shares) on the final day of that
quarter by dividing the amount in the participant's Plan Account by the purchase
price of the stock as determined above.

     Participants receive certificates quarterly for all shares purchased during
that quarter.  They may retain the certificated  shares or sell them in the open
market or  otherwise,  subject  to  securities  and tax law  restrictions.  Upon
termination of employment,  participants  will receive  certificates  evidencing
previously  purchased  shares  and a  return  of any  balance  remaining  in the
participant's account on the date of termination.

     The Board  reserves the right to amend or  discontinue  the Plan,  provided
that no  participant's  existing  rights are  adversely  affected,  and provided
further that without Shareholder approval,  no amendment will be effective:  (1)
increasing the aggregate number of shares authorized for purchase under the Plan
or to be purchased by any participant;  (2) materially changing the requirements
for  eligibility to  participate,  or reducing the purchase price formula in the
Plan, or materially  increasing the benefits accruing to participants  under the
Plan; (3) extending the term of the Plan; or (4) other-


                                       7
<PAGE>

wise modifying the Plan if the  modification  requires  shareholder  approval to
satisfy  applicable  statutes or Internal Revenue Service and/or  Securities and
Exchange Commission regulations.

     1993 STOCK OPTION PLAN.  The  Company's  1993 Stock Option Plan,  which was
approved by the Shareholders at the 1993 Annual Meeting (the "Option Plan"),  is
intended  to  advance  the  interests  of the  Company  by  inducing  persons of
outstanding  ability  and  potential  to join and  remain  with the  Company  by
enabling them to acquire proprietary  interests in the Company.  The Option Plan
covers an aggregate of 11,500,000 shares of Common Stock.

     The  Option  Plan  provides  for the  granting  of two  types  of  options:
"incentive stock options" and "nonstatutory  stock options." The incentive stock
options  (but not the  nonstatutory  stock  options)  are intended to qualify as
"incentive stock options" as defined in Section 422 of the Internal Revenue Code
of 1986, as amended.  The Option Plan succeeded the 1983 Stock Option Plan which
expired in 1993.

     Options  may be granted  under the  Option  Plan to all  full-time  regular
employees  including   officers,   directors  (whether  or  not  employees)  and
consultants of the Company; provided,  however, that incentive stock options may
not be granted to any non-employee  director or consultant.  As of September 10,
1999 190 employees were eligible to participate in the Option Plan.

     The Compensation Committee of the Board of Directors administers the Option
Plan. The Committee has the power, subject to the provisions of the Option Plan,
to determine the persons to whom and the dates on which options will be granted,
the number of shares to be subject to each option,  the time or times during the
term of each  option  within  which  all or a  portion  of  such  option  may be
exercised, and the other terms of the options.

     The maximum term of each option is ten years. Incentive Stock Options (ISO)
granted under the Plan generally vest in sixteenths,  one-sixteenth each quarter
of a year over a four year  period  following  the date of grant.  Non-Statutory
Options (NSO) granted  under the Plan  generally  vest annually over a four-year
period following the date of grant.

     The exercise  price of all  nonstatutory  stock  options  granted under the
Option  Plan  must be at  least  equal to 85% of the  fair  market  value of the
underlying stock on the date of grant. The exercise price of all incentive stock
options  granted under the Option Plan must be at least equal to the fair market
value of the underlying stock on the date of grant.


OPTION GRANTS IN LAST FISCAL YEAR

     The following  table sets forth the options  granted during the last fiscal
year to each of the named executive officers of the Company:

                      Option/SAR Grants In Last Fiscal Year
<TABLE>
<CAPTION>
- ---------------------------------------------------------------------------------------------------------------------
                                         INDIVIDUAL GRANTS              POTENTIAL REALIZABLE VALUE
                                                                        AT ASSUMED ANNUAL RATES
                                                                        OF STOCK PRICE APPRECIATION
                                                                        FOR OPTION TERM
- ---------------------------------------------------------------------------------------------------------------------
                           NUMBER OF    % OF TOTAL
                           SECURITIES   OPTIONS
                           UNDER        GRANTED TO
                           OPTIONS      EMPLOYEES     EXERCISE OR
                           GRANTED      IN FISCAL     BASE PRICE    MARKET      EXPIRATION
NAME                       (#)          YEAR(A)       ($/SH)        PRICE       DATE         0%($)   5%($)
- ------                     ----------   -----------   ------------  --------    -----------  ------  ---------
<S>                        <C>          <C>           <C>           <C>         <C>          <C>     <C>
Douglas P. Boyd            75,008       6% (a)        $1.50(b)      $1.50(b)    10/23/08(b)  -0-     45,800(c)

Gary H. Brooks             50,000       4% (a)        $1.50(b)      $1.50(b)    10/23/08(b)  -0-     30,500(c)

S. Lewis Meyer             100,000      8% (a)        $1.50(b)      $1.50(b)    10/23/08(b)  -0-     61,100(c)

Terry Ross                 25,000       2% (a)        $2.13(d)      $2.13(d)    01/02/08(d)  -0-     33,489(e)

</TABLE>


                                       8
<PAGE>

- ----------

(a)  Based on 1,254,176  options granted to all employees during the fiscal year
     ended December 31, 1998.

(b)  Ten-year  options were granted on February 24, 1998 with an exercise  price
     of $2.56,  which was 100% of the market price of the stock on that date. On
     October 23,  1998,  all of those  options  were  cancelled,  regranted  and
     repriced  with an  exercise  price of $1.50,  which was 100% of the  market
     price of the stock on October 23, 1998.

(c)  Based on  5-year  option  term and  annual  compounding;  results  in total
     appreciation of 27.6% (at 5% per year) and 61.1% (at 10% per year).

(d)  Ten-year  options  were  granted to Mr.  Ross on  January 2, 1998  (while a
     non-employee director) with an exercise price of $2.13 per share, which was
     100% of the market price of the stock on that date.

     As part of his employment contract dated January 5, 1999, Mr. Ross received
     a ten-year option to purchase 300,000 shares of Common Stock at an exercise
     price of $1.13 per share,  125,000  shares of which vest quarterly over the
     first 12 months of employment,  125,000 shares of which vest quarterly over
     the  second  12 months  of  employment,  and  50,000  shares of which  vest
     quarterly in the event Mr. Ross serves for a third 12 months of employment.
     The options  were  granted as of January 1, 1999 with an exercise  price of
     $1.13,  which was 100% of the  market  price of the stock on  December  28,
     1998. This represents 17% of the options granted to employees during fiscal
     year 1999 through close of business on September 13, 1999.  Based on the 10
     year option term, the potential  realizable value of Mr. Ross' option grant
     is 62.8%  (at 5% per  year)  and  159.3%  (at 10% per  year).

(e)  Based on  10-year  option  term and  annual  compounding;  results in total
     appreciation of 62.8% (at 5% per year) and 159.3% (at 10% per year).

OPTION EXERCISES IN LAST FISCAL YEAR AND YEAR-END OPTION VALUES

         The following  table sets forth the options  exercised  during the last
fiscal year by Named Executive Officers of the Company:

       Aggregated Options Exercised and Option Values in Fiscal Year 1998

<TABLE>
<CAPTION>
                                                           NUMBER OF SECURITIES          VALUE OF UNEXERCISED
                                                          UNDERLYING UNEXERCISED        IN THE MONEY OPTIONS AT
                                                          OPTIONS AT YEAR-END (#)            YEAR-END ($)
                       SHARES ACQUIRED       VALUE
         NAME          ON EXERCISE (#)   REALIZED ($)    EXERCISABLE/UNEXERCISABLE     EXERCISABLE/UNEXERCISABLE
        ------        -----------------  ------------   ---------------------------   ---------------------------
<S>                       <C>                 <C>                <C>                                       <C>
Douglas P. Boyd           225,000            $377,250                 0/75,008                             0/0
S. Lewis Meyer            600,000          $1,200,000                0/100,000                             0/0
Gary H. Brooks            100,000             $75,500            27,500/62,500                             0/0
</TABLE>

COMPENSATION COMMITTEE REPORT

     This  report is  provided  by the  Compensation  Committee  of the Board of
Directors  (the  "Committee")  to  assist   stockholders  in  understanding  the
Committee's  objectives  and  procedures in  establishing  the  compensation  of
Imatron's Chief Executive Officer and other executive  officers.  The Committee,
made  up  of  non-employee   Directors,  is  responsible  for  establishing  and
administering the Company's executive  compensation program. None of the members
of the  Committee is eligible to receive  awards under the  Company's  incentive
compensation  programs.  Imatron's executive compensation program is designed to
motivate,  reward,  and  retain the  management  talent  needed to  achieve  its
business  objectives  and maintain its  competitiveness  in the medical  imaging
industry.  It does this by utilizing  competitive base salaries that recognize a
philosophy of career  continuity and by rewarding  exceptional  performance  and
accomplishments that contribute to the Company's success.


                                       9
<PAGE>

                      COMPENSATION PHILOSOPHY AND OBJECTIVE

     The  philosophical  basis  of  the  compensation  program  is  to  pay  for
performance and the level of  responsibility  of an individual's  position.  The
Committee  finds  greatest  value in  executives  who  possess  the  ability  to
implement  the  Company's  business  plans as well as to react to  unanticipated
external  factors that can have a significant  impact on corporate  performance.
Compensation  decisions  for  all  executives,  including  the  named  executive
officers and the Chief Executive Officer, are based on the same criteria.  These
include  quantitative  factors that directly  improve the  Company's  short-term
financial  performance,  as well as  qualitative  factors  that  strengthen  the
Company  over the long  term,  such as  demonstrated  leadership  skills and the
ability to deal quickly and effectively with difficulties which sometimes arise.

     The  Committee  believes  that  compensation  of Imatron's  key  executives
should:

         o  Link rewards to business results and stockholder returns;

         o  Encourage creation of stockholder value and achievement of strategic
            objectives;

         o  Maintain an  appropriate  balance  between base salary and short-and
            long-term incentive opportunity;

         o  Attract and retain, on a long-term basis, highly qualified executive
            personnel; and

         o  Provide total compensation opportunity that is competitive with that
            provided by competitors in the medical imaging industry, taking into
            account  relative company size and performance as well as individual
            responsibilities and performance.


                     KEY ELEMENTS OF EXECUTIVE COMPENSATION

     Imatron's executive  compensation program consists of three elements:  Base
Salary,  Short-Term  Incentives and Long-Term  Incentives.  Payout of short-term
incentives depends on corporate  performance  measured against annual objectives
and  overall  performance.   Payout  of  the  long-term  incentives  depends  on
performance of Imatron stock, both in absolute and relative terms.


BASE SALARY
     A  competitive  base  salary  is  crucial  to  support  the  philosophy  of
management  development  and career  orientation  of  executives.  Salaries  are
targeted to pay levels of the Company's competitors and companies having similar
capitalization  and revenues,  among other  attributes.  Executive  salaries are
reviewed annually.


SHORT-TERM INCENTIVE
     Short-term  awards to executives are made in cash and in stock to recognize
contributions  to the  Company's  business  during the past  year.  The bonus an
executive  receives  is  dependent  on  individual   performance  and  level  of
responsibility.  Assessment  of an  individual's  relative  performance  is made
annually  based  on a number  of  factors  which  include  initiative,  business
judgment, technical expertise, and management skills.

     CASH BONUS PROGRAM.  From time to time,  the Committee  adopts an Executive
Officer Cash Bonus Program, pursuant to which executive officers are eligible to
receive a bonus from a pool  consisting of a set  percentage of net profits from
that particular fiscal year. The Committee allocates to each executive officer a
percentage  of the bonus pool.  For the year 1998 the  Committee did not adopt a
Cash Bonus Program,  and no cash bonus awards were made to any executive officer
during 1998.

     STOCK BONUS INCENTIVE PLAN. In 1988 the shareholders  approved the adoption
of the 1987 Stock  Bonus  Incentive  Plan,  which was  subsequently  updated and
amended in 1996. Under the terms of the Stock Bonus Plan the Committee may award
shares of the Company's Common Stock to employees, including executive officers.


                                       10
<PAGE>

LONG-TERM INCENTIVE
     Long-term  incentive awards provided by  shareholder-approved  compensation
programs are designed to develop and maintain  strong  management  through share
ownership and incentive awards. During 1998, the Compensation  Committee awarded
75,008,  100,000 and 50,000 options to the Chairman, the Chief Executive Officer
and the Chief Financial Officer, respectively, as set forth on the above chart.

     STOCK OPTION PLAN. In 1994, the  shareholders  approved the adoption of the
1993 Stock Option Plan (which  replaced the 1983 Stock Option Plan). In 1995 the
directors and shareholders approved an increase in the number of shares reserved
under the Option Plan from 3,000,000 shares to 5,500,000 shares,  and in 1999 an
increase  to  11,500,000  shares was  approved.  At the sole  discretion  of the
Committee,  eligible  officers and  employees  periodically  receive  options to
purchase  shares of the Company's  Common Stock pursuant to the Option Plan. The
value of the options depends entirely on appreciation of Imatron stock. Grant of
options depends upon quarterly and annual Company performance,  as determined by
review of qualitative and quantitative factors.

     EMPLOYEE  STOCK  PURCHASE  PLAN.  In 1994 the  directors  and  shareholders
approved the adoption of the 1994 Employee  Stock  Purchase Plan. All employees,
including executive officers,  may purchase shares of the Company's Common Stock
at a  discount  of 15% from the  market  price of the  shares.  The Plan  became
effective January 1, 1994.

                               1998 COMPENSATION.

     Total revenue, net product revenue,  scanner shipments and total assets for
the year ended December 31, 1998 decreased from the prior fiscal year. HeartScan
Imaging, Inc., the Company's majority-owned subsidiary, sustained losses, albeit
substantially   less  than  those  sustained   during  the  prior  fiscal  year.
Nevertheless,  compensation  levels  during  1998 were  principally  driven by a
highly  competitive  market in San Francisco  Silicon Valley,  particularly  for
personnel  with   engineering   and  technical   training.   As  a  consequence,
compensation for such personnel  increased  approximately 3% to 5%. Based on the
Company's  performance,  the Board  awarded  no cash or stock  bonuses  and only
modest  cost-of-living  salary  increases during the year to the Named Executive
Officers. Stock Options were granted to the Named Executive Officers, as well as
to  other  employees  of  the  Company,   based  on  the  employee's   level  of
responsibility and other factors.

                    1998 CHIEF EXECUTIVE OFFICER COMPENSATION

     On March 1, 1996 Mr.  Meyer's base salary was  increased  from  $195,000 to
$205,000.  Effective  January 1, 1997 his base salary was increased to $215,250.
Effective March 1, 1998, it was increased to $228,000.  All of these adjustments
reflect modest cost of living  increases.  The Committee  believes that the base
salary and other terms and conditions of his employment are consistent  with the
foregoing  philosophy  and  objectives  and  reflect  the scope and level of his
responsibilities.

Members of the Compensation Committee

William McDaniel
Terry Ross (through 12/31/98)
Aldo Test

SHARE INVESTMENT PERFORMANCE

     The following  graph  compares the total return  performance of the Company
for the periods indicated with the performance of the NASDAQ Index (presented on
a  dividends  reinvested  basis) and the  performance  of the  Hambrecht & Quist
Technology  Index. The Company's shares are traded


                                       11
<PAGE>

on the NASDAQ  National  Market System under the symbol  "IMAT." The Hambrecht &
Quist  Technology  Index is  comprised  of the  publicly  traded  stocks  of 200
technology  companies  and includes  companies in the  electronics,  medical and
related  technology  industries.  The total return  indices  reflect  reinvested
dividends and are weighted on a market  capitalization basis at the time of each
reported data point.

                                PERFORMANCE GRAPH

                                 [GRAPH OMITTED]

- -------------------------------------------------------------------------
          YEARS          1993    1994    1995    1996    1997    1998
- -------------------------------------------------------------------------
Imatron Inc.              100     219    400      663     463     275
- -------------------------------------------------------------------------
NASDAQ Stock Market       100     98     138      170     209     293
- -------------------------------------------------------------------------
H&Q Technology Index      100     120    180      223     262     407
- -------------------------------------------------------------------------

EMPLOYMENT CONTRACTS, TERMINATION OF EMPLOYMENT
AND CHANGE-IN-CONTROL ARRANGEMENTS

     S. Lewis Meyer became President and Chief Executive  Officer of the Company
on June 14, 1993. In connection with such employment the Company entered into an
Executive  Employment  Agreement  with Mr. Meyer  providing  for an initial term
ending December 31, 1994 and continuing for rolling six month periods thereafter
(filed as Exhibit 10.65 to Annual Report on Form 10-K for 1993.) Pursuant to the
agreement, in the event of his termination, Mr. Meyer is entitled to receive six
months of compensation at the annual salary rate then in effect.

     Terry Ross became  President of the Company on January 1, 1999. The Company
entered into a two-year  employment  agreement  with Terry Ross dated January 5,
1999. The Agreement provides for an annual base salary of $200,000 and an annual
commission  in the amount of 0.5% of product  and  upgrade  sales  revenue  paid
monthly.  Pursuant to the Agreement, Mr. Ross received (i) a warrant to purchase
200,000 shares of Common Stock at an exercise price of $1.375 per share, 100,000

                                       12
<PAGE>

shares of which vest on the date 6 months after commencement of employment, with
the  remaining  100,000  shares  vesting on the date 12 months after  employment
commences;  and (ii) an option to purchase  300,000 shares of Common Stock at an
exercise  price of $1.13 per share,  125,000 shares of which vest quarterly over
the first 12 months of  employment,  125,000 shares of which vest quarterly over
the second 12 months of employment, and 50,000 shares of which vest quarterly in
the event Mr. Ross serves for a third 12 months of employment.

     In  connection  with his  employment,  the  Company  and Mr.  Ross  have an
understanding  that if his employment  terminates  within the first 24 months of
employment  for any  reason  other  than  termination  for  cause  or  voluntary
resignation,  he will be entitled to:  salary and benefits  that would have been
payable  for  the  greater  of  twelve  months  or the  then  balance  from  the
termination date to 24 months; immediate vesting of options and warrants granted
in  connection  with his  employment;  and an exercise  period  regarding  those
options and warrants of two years from the date of termination.


REPORT ON REPRICING OF OPTIONS/SARS.

     Effective  February 24, 1998,  the  Compensation  Committee of the Board of
Directors  repriced all options  previously granted to employees pursuant to the
Company's 1993 Stock Option Plan to the lesser of the actual grant price or 100%
of the  closing  price of a price of the  Company's  common  stock on that date,
which price was subsequently  determined to be $2.56.  This repricing applied to
all employees equally,  including Named Executive  Officers,  to the extent that
they held  options  previously  granted  under the 1993 Plan.  Pursuant  to this
repricing, the Company repriced 760,597 options previously granted to employees.
None of the repriced options was held by Named Executive Officers.

     Thereafter,  effective October 23, 1998, the Board of Directors  approved a
resolution  pursuant  to which  all  optionholders,  including  Named  Executive
Officers,  were given the option of  returning  to the Company  any  outstanding
option  having an  exercise  price of greater  than $1.50 for  cancellation  and
repricing  at  $1.50,  which  was  100% of the  closing  price of a share of the
Company's common stock as of that date. Pursuant to this repricing,  the Company
cancelled and regranted  1,158,992 options previously  granted to employees,  of
which 100,000,  75,008 and 50,000  respectively  were granted to Messrs.  Meyer,
Boyd and Brooks.  Pursuant to the October 23, 1998 repricing option, the vesting
schedule with respect to any options cancelled and thereupon regranted for a ten
year term at an  exercise  price of $1.50 began anew with a new  original  grant
date of October 23, 1998.


                         TEN-YEAR OPTION/SAR REPRICINGS
<TABLE>
<CAPTION>

                                    NUMBER OF       MARKET
                                    SECURITIES      PRICE           EXERCISE
                                    UNDER           OF STOCK        PRICE           NEW           LENGTH OF
                                    OPTIONS         AT TIME OF      AT TIME OF      EXERCISE      ORIGINAL
NAME                   DATE         REPRICED        REPRICING       REPRICING       PRICE ($)     OPTION TERM
- ------                 -----        -----------     -----------     -----------     ----------    --------------
<S>                    <C>          <C>             <C>             <C>             <C>           <C>
Douglas P. Boyd,       10/23/98     75,008          $1.50           $2.56           $1.50         2/24/08
  Chairman
S. Lewis Meyer,        10/23/98     100,000         $1.50           $2.56           $1.50         2/24/08
  Chief Executive
  Officer
Gary H. Brooks,        10/23/98     50,000          $1.50           $2.56           $1.50         2/24/98
  Chief Financial
  Officer
   (through 8/31/99)

</TABLE>
                                       13
<PAGE>

     The basis of the  regrant to all  employees,  including  to the above Named
Executive  Officers,  was the opinion of the  Compensation  Committee  that this
method provide  employees with the greatest  amount of incentive to increase the
value of the Company.


                                  OTHER MATTERS

     The  Company  knows of no other  matters  to be  submitted  at the  Special
Meeting.  If any other matters properly come before the Special  Meeting,  it is
the intention of the persons named in the enclosed proxy to vote the shares they
represent as the Board may recommend.

South San Francisco, California
September 27, 1999



                             THE BOARD OF DIRECTORS

                                       14
<PAGE>


                                   APPENDIX A


                        FORM OF STOCK PURCHASE AGREEMENT

     THIS STOCK PURCHASE  AGREEMENT  ("Agreement") is made as of the 16th day of
June, 1999 by and between IMATRON INC., a New Jersey  corporation with principal
offices located at 389 Oyster Point Boulevard,  South San Francisco,  California
94080 ("Seller") and TERRY ROSS (the "Purchaser").

     WHEREAS,  Seller has  authorized the issuance and sale of certain shares of
its common stock (the "Common  Stock") and warrants to purchase its common stock
(the "Warrants") in exchange for certain consideration; and

     WHEREAS,  Purchaser  desires to  purchase  and  Seller  desires to sell the
Shares on the terms and conditions set forth herein.

     NOW,  THEREFORE,  in  consideration of the mutual covenants and agreements,
the Seller and Purchaser hereby agree as follows:


                                    AGREEMENT

     1. PURCHASE AND SALE OF SHARES. Seller agrees to sell to Purchaser and upon
the basis of the  representations  and warranties,  and subject to the terms and
conditions,  set forth in this  Agreement,  Purchaser  agrees to purchase for an
Aggregate Purchase Price equal to the following:  (i) 3,767,713 shares of Common
Stock (the  "Shares");  (ii) a five year warrant to purchase  360,000  shares of
Common  Stock at  $1.044;  and (iii) a one year  warrant to  purchase  2,991,077
shares of Common Stock at $1.003 per share (collectively,  the "Warrants").  The
forms of the Warrants  are  attached  hereto as Exhibits A and B. The Shares and
the Warrants are hereinafter  collectively referred to as the "Securities".  The
Shares and the shares of Common Stock issuable upon exercise of the Warrants are
hereinafter referred to as the "Registrable Securities".

     2. CLOSING.  The closing of the purchase and sale of securities pursuant to
Section 1 hereof  shall take place at the offices of Seller set forth in Section
12 below as soon as all of the conditions set forth in Section 6 below have been
satisfied.  Within ten (10)  business days  following  the Closing,  Seller will
deliver to Purchaser certificates representing the Securities.  Delivery of such
certificates shall be in accordance with Purchaser's instructions.

     3. RESTRICTION ON TRANSFER OF SECURITIES.

          3.1. RESTRICTIONS.  The Shares are transferable only pursuant to (a) a
public  offering  registered  under the  Securities Act of 1933, as amended (the
"Securities  Act"),  (b) Rule 144 (or any similar  rule then in effect)  adopted
under the  Securities  Act,  if such rule is  available,  and (c) subject to the
conditions  elsewhere  specified in this Section 4, any other legally  available
means of transfer.

          3.2. LEGEND. Each certificate representing Securities will be endorsed
with  the  following  legend:  "The  securities  evidenced  hereby  may  not  be
transferred without (i) the opinion of counsel  satisfactory to the Company that
such transfer may be lawfully made without registration under the Securities Act
of 1933 and all applicable state securities laws or (ii) such registration."

          3.3. STOP TRANSFER  ORDER.  A stop transfer order shall be placed with
the  Seller's  transfer  agent  preventing  transfer  of any  of the  securities
referred to in Section 3.2 above  pending  compliance  with the  conditions  set
forth in any such legend.

          3.4.  REMOVAL  OF LEGEND.  Any legend  endorsed  on a  certificate  or
instrument  evidencing  a  security  pursuant  to Section  3.2  hereof  shall be
removed,  and Seller shall issue a certificate or instrument without such legend
to the holder of such security,  (a) in accordance with Section 3.2 hereof,  (b)
if such  security  is being  disposed  of  pursuant  to  registration  under the
Securities  Act and



                                      A-1
<PAGE>

any  applicable  state acts or pursuant to Rule 144 or any similar  rule then in
effect,  or (c) if such  holder  provides  Seller  with an  opinion  of  counsel
satisfactory  to it to the  effect  that a sale,  transfer,  assignment,  offer,
pledge  or  distribution  for  value  of  such  security  may  be  made  without
registration  and that such legend is not  required  to satisfy  the  applicable
exemption from registration.

     4. REPRESENTATIONS AND WARRANTIES BY SELLER. Seller represents and warrants
to Purchaser that:

          4.1.  ORGANIZATION,  STANDING,  POWER.  Seller is a  corporation  duly
organized,  validly existing and in good standing under the laws of the State of
New  Jersey  and has the  requisite  corporate  power and  authority  to own its
properties  and to carry on its business in all  material  respects as it is now
being  conducted.  Seller  has,  or at the  Closing  will  have,  the  requisite
corporate power and authority to issue the Securities,  and to otherwise perform
its obligations under this Agreement.

          4.2. QUALIFICATION.  Seller is duly qualified or licensed as a foreign
corporation  in good  standing  in each  jurisdiction  wherein the nature of its
activities  or of its  properties  owned or leased makes such  qualification  or
licensing  necessary  and failure to be so  qualified  or licensed  would have a
material adverse impact on its business.

          4.3.  COMPLIANCE  WITH  APPLICABLE  LAWS  AND  OTHER   INSTRUMENTS.The
business  and  operations  of  Seller  have  been  and are  being  conducted  in
accordance with all applicable  laws,  rules and regulations of all governmental
authorities.  Subject to shareholder  approval of appropriate  amendments to the
Articles of  Incorporation  as contemplated  by this Agreement,  and except with
respect to existing  registration rights of holders of certain securities issued
by Seller,  neither the  execution  nor delivery of, nor the  performance  of or
compliance  with,  this  Agreement  nor  the  consummation  of the  transactions
contemplated  hereby will conflict with or, with or without the giving of notice
or passage of time,  result in any breach of, or constitute a default under,  or
result in the imposition of any lien or  encumbrance  upon any asset or property
of  Seller  pursuant  to,  any  applicable  law,  administrative  regulation  or
judgment,  order or decree of any court or  governmental  body, any agreement or
other  instrument  to  which  Seller  is a party  or by  which  it or any of its
properties,  assets or rights is bound or  affected,  and will not  violate  the
Articles of Incorporation or Bylaws of Seller. Seller is not in violation of its
Articles of Incorporation or its Bylaws.

          4.4.  COMMON  STOCK.  The Shares,  and the Common Stock  issuable upon
exercise of the Warrants, when issued and paid for pursuant to the terms of this
Agreement, will be duly authorized,  validly issued and outstanding, fully paid,
nonassessable  and  free and  clear  of all  pledges,  liens,  encumbrances  and
restrictions.

     5.  REPRESENTATIONS AND WARRANTIES OF PURCHASER.  Purchaser  represents and
warrants that:

          5.1.  INVESTMENT  INTENT.  The Securities being acquired hereunder are
being  purchased  for  Purchaser's  own account and not with the view to, or for
resale in connection  with, any  distribution or public offering  thereof within
the meaning of the Securities  Act.  Purchaser  understands  that the Securities
have not been registered  under the Securities Act or any applicable  state laws
by reason of their  issuance or  contemplated  issuance in a transaction  exempt
from the registration and prospectus delivery requirements of the Securities Act
and such laws and that the reliance of Seller and others upon this  exemption is
predicated  in part upon this  representation  and warranty.  Purchaser  further
understands  that the  Securities  may not be  transferred or resold without (a)
registration  under the Securities Act and any applicable  state securities laws
or (b) an exemption from the  requirements  of the Securities Act and applicable
state securities laws.

          5.2.  ACCREDITED  INVESTOR.   Purchaser  qualifies  as  an  accredited
investor within the meaning of Rule 501 under the Securities Act.  Purchaser has
such knowledge and  experience in financial and business  matters that Purchaser
is capable of  evaluating  the  merits  and risks of the  investment  to be made
hereunder by Purchaser.

                                      A-2
<PAGE>

          5.3. ACTS AND  PROCEEDINGS.  This Agreement has been duly executed and
delivered by Purchaser,  and is a valid and binding  agreement  upon the part of
Purchaser.

          5.4. NO BROKERS OR FINDERS. No person, firm or corporation has or will
have,  as a result of any act or omission by Purchaser,  any right,  interest or
valid claim against Seller for any  commission,  fee or other  compensation as a
finder  or  broker,  or  in  any  similar  capacity,   in  connection  with  the
transactions  contemplated by this Agreement.  Purchaser will indemnify and hold
Seller  harmless  against  any  and  all  liability  with  respect  to any  such
commission,  fee or other  compensation which may be payable or determined to be
payable  as a  result  of the  actions  of  Purchaser  in  connection  with  the
transactions contemplated by this Agreement.

     6. CONDITIONS OF PURCHASER'S OBLIGATION. Purchaser's obligation to purchase
and pay for the  Securities  on the Closing  Date is subject to the  fulfillment
prior to or on the Closing Date of the conditions set forth below.  In the event
that any such  condition is not  satisfied  to  Purchaser's  satisfaction,  then
Purchaser shall not be obligated to proceed with the purchase of such Shares nor
further with any of its obligations pursuant to this Agreement.

          6.1. NO ERRORS.  ETC. The  representations  and  warranties  of Seller
under this  Agreement  shall be true in all material  respects as of the Closing
Date with the same effect as though made on and as of the Closing Date.

          6.2.  COMPLIANCE  WITH  AGREEMENT.Seller   shall  have  performed  and
complied in all material respects with all agreements or conditions  required by
this  Agreement  to be performed  and complied  with by it prior to or as of the
Closing.

          6.3.  QUALIFICATION  UNDER STATE SECURITIES  LAWS. All  registrations,
qualifications, permits and approvals required under applicable state securities
laws for the lawful  execution  and  delivery of this  Agreement  and the offer,
sale, issuance and delivery of the Securities shall have been obtained.

          6.4.  PROCEEDINGS AND DOCUMENTS.  All corporate and other  proceedings
and actions taken in connection with the  transactions  contemplated  hereby and
all  certificates,  opinions,  agreements,  instruments and documents  mentioned
herein or incident to any such  transaction  shall be  satisfactory  in form and
substance to Purchaser and its counsel.

     7.  CONDITIONS  OF SELLER'S  OBLIGATION.  Seller's  obligation  to sell the
Securities to Purchaser on the Closing Date is subject to the fulfillment  prior
to or on the Closing Date of the conditions  set forth below.  In the event that
any such  condition is not  satisfied,  Seller shall not be obligated to proceed
with the sale of such Securities.

          7.1. NO ERRORS,  ETC. The  representations and warranties of Purchaser
under this  Agreement  shall be true in all material  respects as of the Closing
with the same effect as though made on and as of the Closing.

          7.2.  COMPLIANCE WITH  CONDITIONS.  Purchaser shall have performed and
complied  with all  agreements or  conditions  required by this  Agreement to be
performed and complied with by it prior to or as of the Closing.

     8. SELLER AFFIRMATIVE COVENANTS. Seller covenants and agrees that:

          8.1. CORPORATE EXISTENCE. Seller will maintain its corporate existence
in good  standing and comply with all  applicable  laws and  regulations  of the
United States or of any state or states thereof or of any political  subdivision
thereof and of any governmental  authority where failure to so comply would have
a material adverse impact on Seller or its business or operations.

          8.2.  BOOKS OF ACCOUNT AND RESERVES.  Seller will keep books of record
and  account in which  full,  true and  correct  entries  are made of all of its
respective dealings, business and affairs, in accordance with generally accepted
accounting principles.  Seller will employ certified public accountants selected
by the  Board  who  are  "independent"  within  the  meaning  of the  accounting
regulations  of the  Securities  and  Exchange  Commission  and will have annual
audits made by such independent  public  accountants in the course of which such
accountants shall make such exami-



                                      A-3
<PAGE>

nations,  in accordance  with generally  accepted  auditing  standards,  as will
enable  them to give such  reports or  opinions  with  respect to the  financial
statements of Seller that will satisfy the  requirements  of the  Securities and
Exchange  Commission  in effect at such time with  respect to  certificates  and
opinions of accountants.

          8.3. FURNISHING OF FINANCIAL  STATEMENTS AND INFORMATION.  Seller will
deliver to Purchaser:

               (a) as soon as practicable, but in any event within 45 days after
the close of each quarterly  period,  unaudited  consolidated  balance sheets of
Seller as of the end of such  period,  together  with the  related  consolidated
statements  of  operations  and cash  flow for such  period,  setting  forth the
budgeted  figures for such period  prepared  and  submitted in  connection  with
Seller's  annual  business  plan  and  in  comparative   form  figures  for  the
corresponding  quarterly  period of the previous  fiscal year, all in reasonable
detail and certified by an authorized  accounting officer of Seller,  subject to
year-end adjustments;

               (b) as soon as practicable, but in any event within 90 days after
the end of each fiscal year, a  consolidated  balance  sheet of Seller as of the
end of such fiscal year,  together with the related  consolidated  statements of
operations,  shareholders'  equity and cash flow for such fiscal  year,  setting
forth  in  comparative  form  figures  for  the  previous  fiscal  year,  all in
reasonable detail and duly certified by Seller's independent public accountants,
which  accountants  shall have given  Seller an opinion,  unqualified  as to the
scope of the audit, regarding such statements; and

               (c)  with  reasonable  promptness,   such  other  financial  data
relating  to the  business,  affairs  and  financial  condition  of Seller as is
available to Seller and as from time to time Purchaser may reasonably request.

     9.  REGISTRATION  OF STOCK.  The Company shall use its best efforts to file
with the SEC as  promptly  as  practicable  and  thereafter  shall  use its best
efforts to cause to be declared effective by December 15, a "shelf" registration
statement on the  appropriate  form under the  Securities  Act providing for the
registration  of, and the sale on a continuous or delayed basis by Purchaser all
of the Registrable Securities, pursuant to Rule 415 or any similar rule that may
be adopted by the SEC (the "Shelf Registration"). The Company shall use its best
efforts to keep the Shelf Registration continuously effective in order to permit
the  prospectus  forming  part  thereof to be usable by  Purchaser  for a period
ending on the earlier of (i) (x) the second anniversary of the Closing,  (y) the
expiration of the period following the Closing after which Rule 144(k) under the
Securities Act generally becomes available to non-affiliates of an issuer or (z)
in the event the Company  has at any time  suspended  the use of the  prospectus
contained in the Shelf Registration pursuant to this paragraph,  the date beyond
the earlier of the periods  referred to in clauses (x) and (y) that  reflects an
additional  period of days equal to the number of days during all of the periods
from and  including  the  dates the  Company  gives  notice  of such  suspension
pursuant to this paragraph to and including the date when holders of Registrable
Securities  receive an amended or  supplemented  prospectus  necessary to permit
resales  of  Registrable  Securities  under  the  Shelf  Registration  or to and
including the date on which the Company  gives a Resumption  Notice of (ii) such
time as all of the Registrable Securities covered by the Shelf Registration have
been sold  pursuant  to the Shelf  Registration  or pursuant to Rule 144 (in any
such case,  such  period  being  called the "Shelf  Registration  Period").  The
Company  shall be  deemed  not to have used its best  efforts  to keep the Shelf
Registration  effective during the requisite period if it voluntarily  takes any
action that would result in holders of Securities covered thereby not being able
to offer and sell Registrable Securities during that period, unless such action,
in the opinion of the Company after  consulting with legal counsel,  is required
by applicable law. Notwithstanding any other provisions hereof, the Company will
ensure  that  (i) any  Shelf  Registration  and any  amendment  thereto  and any
prospectus  forming  part  thereof and any  supplement  thereto  complies in all
material  respects  with  the  Securities  Act and  the  rules  and  regulations
thereunder, (ii) any Shelf Registration and any amendment thereto does not, when
it becomes effective,  contain an untrue statement of a material fact or omit to
state a material  fact  required to be stated  herein or  necessary  to make the
statements  therein not misleading and (iii) any prospectus  forming part of any
Shelf  Registration,  and any supplement to such  prospectus does


                                      A-4
<PAGE>

not include an untrue  statement of a material  fact or omit to state a material
fact  necessary  in order to make the  statements  therein,  in the light of the
circumstances under which they were made, not misleading.

          9.1.  INDEMNIFICATION.  In the event that Shares purchased pursuant to
this  Agreement are included in a registration  statement  under this Section 9,
Seller will indemnify and hold harmless each Selling  Shareholder and each other
person, if any, who controls such Selling  shareholder within the meaning of the
Securities Act,  against any losses,  claims,  damages or liabilities,  joint or
several,  to which such Selling  Shareholder  or  controlling  person may become
subject under the Securities Act or otherwise,  insofar as such losses,  claims,
damages or  liabilities  (or actions in respect  thereof) arise out of are based
upon any untrue  statement or alleged  untrue  statement  of any  material  fact
contained, on the effective date thereof, in any registration statement pursuant
to which the Shares were  registered  under the Securities  Act, any preliminary
prospectus or final prospectus contained therein, or any amendment or supplement
thereto,  or arise out of or are based upon the omission or alleged  omission to
state therein a material fact required to be stated therein or necessary to make
the  statements  therein not  misleading,  or arise out of or are based upon the
failure by Seller to file any amendment or supplement  thereto that was required
to  be  filed  under  the  Securities  Act,  and  will  reimburse  such  Selling
Shareholder and each such controlling person for any legal or any other expenses
reasonably  incurred by them in connection with  investigating  or defending any
such loss, claim,  damage,  liability or action.  Notwithstanding the foregoing,
Seller  will not be liable in any such case to the  extent  that any such  loss,
claim,  damage,  or liability arises out of or is based upon an untrue statement
or omission made in such registration statement,  preliminary prospectus,  final
prospectus or amendment or  supplement  in reliance upon and in conformity  with
written  information  furnished to Seller through an instrument duly executed by
or on behalf of any Selling Shareholder  specifically for use in the preparation
of such registration  statement,  preliminary prospectus,  final prospectus,  or
amendment or supplement.

          It shall be a condition  precedent to the obligation of Seller to take
any  action  pursuant  to this  Section  that  seller  shall  have  received  an
undertaking  satisfactory  to it from each Selling  Shareholder to indemnify and
hold harmless  Seller (in the same manner and to the same extent as set forth in
this  Section),  each  director  of  Seller,  each  officer  who shall sign such
registration statement, and any persons who control Seller within the meaning of
the  Securities  Act,  with  respect  to any  statement  or  omission  from such
registration  statement,   preliminary  prospectus,   or  any  final  prospectus
contained therein,  or any amendment or supplement thereto, if such statement or
omission was made in reliance  upon and in conformity  with written  information
furnished to Seller  through an  instrument  duly  executed by the  indemnifying
party  specifically for use in the preparation of such  registration  statement,
preliminary prospectus, final prospectus, or amendment or supplement.

          Promptly  following  receipt by an indemnified  party of notice of the
commencement  of any action  involving a claim referred to above in this Section
9.3, such  indemnified  party will, if a claim in respect  thereof is to be made
against  an  indemnifying  party,  give  written  notice  to the  latter  of the
commencement  of such  action.  In case any such  action is  brought  against an
indemnified party, the indemnifying party will be entitled to participate in and
to  assume  the  defense  thereof,  jointly  with any other  indemnifying  party
similarly  notified,  to the extent that it may wish,  with  counsel  reasonably
satisfactory to such  indemnified  party, and after notice from the indemnifying
party to such  indemnified  party of its election to assume the defense thereof,
the  indemnifying  party  will not be liable to such  indemnified  party for any
legal or other expenses  subsequently  incurred by the latter in connection with
the defense thereof.

          9.2.  BINDING  PROVISIONS.  The  provisions of this Section 9 shall be
binding on the successors of Seller. No Shareholder may assign the provisions of
this  Section  9 or all or any  part  of its  or  their  rights  or  obligations
hereunder,  except that in the event of a merger or  consolidation  in which the
Seller is not the survivor,  the Seller shall assign and transfer, and successor
shall assume, the provisions of this Section 9.



                                      A-5
<PAGE>

          9.3.  CONFLICTS.  To the  extent  that  Seller's  compliance  with the
obligations  set forth in Sections 9.1 through 9.4 above would  conflict with or
otherwise  cause a breach of or default  under any of its  existing  obligations
pursuant to any agreements to which it currently is a party, Seller's failure to
comply with those obligations shall not be deemed a breach of this Agreement.

          9.4. LIQUIDATED DAMAGES. In the event that the Company by December 15,
1999 shall fail to cause the Shelf  Registration  Statement  with respect to the
Securities  to be  declared  effective  and shall fail to obtain  all  necessary
stockholder and NASDAQ approvals in order to enable Purchaser to freely sell the
Registrable Securities pursuant to the Shelf Registration, the Company shall pay
to the  Purchaser  for  each  month  or  portion  thereafter  until  such  Shelf
Registration  Statement becomes effective an amount equal to two percent (2%) of
the purchase price paid for the Securities pursuant to this Agreement.  Provided
that the Company shall continue to use its reasonable best efforts to cause such
Shelf Registration to become effective as promptly as practicable,  the delivery
of such Common Stock shall be in full  satisfaction of any liability on the part
of the Company for failing to register the Shares as provided  herein;  provided
further  however,  that such  delivery  shall not  excuse the  Company  from the
obligation to register all of such  Registrable  Shares which  obligation  shall
continue.

     10. REMEDIES CUMULATIVE, AND NOT WAIVED.

          10.1.  No right,  power or remedy  conferred  upon any party  shall be
exclusive,  and each such  right,  power or remedy  shall be  cumulative  and in
addition to every other right,  power or remedy,  whether conferred hereby or by
any such  security  or now or  hereafter  available  at law or in  equity  or by
statute or otherwise.

          10.2.  No course  of  dealing  between  the  parties,  and no delay in
exercising any right,  power or remedy  conferred hereby or by any such security
or now or  hereafter  existing  at law or in equity or by statute or  otherwise,
shall  operate as a waiver of or otherwise  prejudice  any such right,  power or
remedy;  provided,  however,  that this  Section  10 shall not be  construed  or
applied  so as to negate  the  provisions  and  intent of any  statute  which is
otherwise applicable.

     11. CHANGES.  WAIVERS.
ETC.  Neither this  Agreement nor any provision  hereof may be changed,  waived,
discharged or terminated  orally,  but only by a statement in writing  signed by
the  party  against  which  enforcement  of the  change,  waiver,  discharge  or
termination is sought.  12. NOTICES.  All  communications  hereunder shall be in
writing and if sent to the  Purchaser,  shall be  sufficient  in all respects if
personally  delivered,  sent by registered mail, or by telecopy and confirmed to
the Purchaser at the address set forth on the Signature  Page, or if sent to the
Company, shall be personally delivered,  sent by registered mail, or by telecopy
and confirmed to the Company as follows:
                    Imatron Inc.
                    Oyster Point Blvd.
                    South San Francisco, California 94080
                    Attn: Chief Financial Officer
                    Telephone: (650) 583-9964
                    Facsimile: (650) 871-0418

     13. SURVIVAL OF REPRESENTATIONS  AND WARRANTIES,  ETC. All  representations
and warranties contained herein shall survive the execution and delivery of this
Agreement, any investigation at any time made by Purchaser or on its behalf, and
the  sale  and  purchase  of  the  Shares.  All  statements   contained  in  any
certificate,  instrument  or other  writing  delivered by or on behalf of Seller
pursuant  hereto or in  connection  with or  contemplation  of the  transactions
herein contemplated (other than legal opinions) shall constitute representations
and warranties by Seller hereunder and not by the individual  officer who signed
the certificate, instrument or writing by or on behalf of Seller.

     14.  PARTIES IN INTEREST.  All the terms and  provisions of this  Agreement
shall be  binding  upon and inure to the  benefit of and be  enforceable  by the
respective successors and assigns of the


                                      A-6
<PAGE>

parties hereto, whether so expressed or not, and, in particular,  shall inure to
the benefit of and be enforceable by the current holder or holders of any of the
Shares.

     15. HEADINGS. The headings of the Sections and paragraphs of this Agreement
have been inserted for  convenience  of reference  only and do not  constitute a
part of this Agreement.

     16.  CHOICE OF LAW. It is the  intention  of the  parties  that the laws of
California shall govern the validity of this Agreement,  the construction of its
terms and the interpretation of the rights and duties of the parties.

     17.  COUNTERPARTS.  This Agreement may be executed  concurrently  in two or
more counterparts,  each of which shall be deemed an original,  but all of which
together shall constitute one and the same instrument.`

     18.  SEVERABILITY.  In the  event  that  any  part  of  this  Agreement  is
determined by a court of competent jurisdiction to be unenforceable, the balance
of the Agreement shall remain in full force and effect.

IN WITNESS WHEREOF,  the
parties execute this Agreement as of the date set forth below.

                                SELLER:
                                   IMATRON INC.

                                   By:----------------------------------
                                       Chief Executive Officer

                                PURCHASER:

                                   -------------------------------------
                                   Signature

                                   -------------------------------------
                                   Address

                                   -------------------------------------
                                   City and Country

                                   -------------------------------------
                                   Facsimile Number



                                      A-7
<PAGE>

                                   APPENDIX B

                     FORM OF COMMON STOCK PURCHASE WARRANT

THIS  WARRANT  AND THE  SHARES OF STOCK OF  IMATRON  INC TO BE  ISSUED  UPON ANY
EXERCISE  OF THIS  WARRANT  HAVE NOT BEEN  AND WILL NOT BE  REGISTERED  WITH THE
SECURITIES AND EXCHANGE COMMISSION UNDER THE SECURITIES ACT OF 1933, AS AMENDED,
OR UNDER  ANY  STATE  SECURITIES  LAW AND ANY  SALE,  TRANSFER,  PLEDGE OR OTHER
DISPOSITION  THEREOF  MAY BE MADE ONLY (I) IN A  REGISTRATION  UNDER SAID ACT OR
(II) IF AN  EXEMPTION  FROM  REGISTRATION  UNDER SAID ACT AND  APPLICABLE  STATE
SECURITIES  LAWS IS AVAILABLE AND THE COMPANY HAS RECEIVED AN OPINION OF COUNSEL
TO THAT EFFECT REASONABLY SATISFACTORY TO IT.

                                  IMATRON INC.

                         COMMON STOCK PURCHASE WARRANT
                   TO PURCHASE 360,000 SHARES OF COMMON STOCK
                                OF IMATRON INC.

                       This Warrant Expires June 15, 2004

Warrant No. 99-3

     THIS CERTIFIES that,  subject to the terms and conditions  herein set forth
in this  warrant,  TERRY L. ROSS (the  "Holder")  is entitled  to purchase  from
Imatron Inc., a New Jersey corporation ("Company"),  at any time or from time to
time  during the  Exercise  Period  (defined  in Section 12 below) the number of
fully  paid and  non-assessable  shares  of  common  stock of the  Company  (the
"Shares") as provided  herein upon  surrender  of this Warrant at the  principal
office of the Company,  and, at the election of the Holder,  upon payment of the
purchase  price  at said  office  in cash or by  cashier's  check or by the wire
transfer of funds in a dollar  amount equal to the purchase  price of the Shares
for which the  consideration  is being given.  This Warrant shall be exercisable
for that number of Shares as set forth above, in minimum units of 1,000 shares.

     1.  PURCHASE  PRICE.  Subject to adjustment as  hereinafter  provided,  the
purchase  price of one  share of  Common  Stock  (or such  securities  as may be
substituted for one share of Common Stock pursuant to the provisions hereinafter
set forth) (the "Warrant  Price") shall One Dollar and Four and  Four-tenths  of
One Cent ($1.044).

     2. ADJUSTMENT OF WARRANT PRICE AND NUMBER OF SHARES. The number and kind of
securities  issuable  upon the  exercise  of this  Warrant  shall be  subject to
adjustment from time to time upon the happening of certain events as follows:

          a.  ADJUSTMENT FOR DIVIDENDS IN STOCK.  If at any time on or after the
date  hereof,  the holders of the Common  Stock of the Company (or any shares of
stock or other  securities  at the time  receivable  upon the  exercise  of this
Warrant)  shall have  received,  or, on or after the  record  date fixed for the
determination of eligible  stockholders,  shall have become entitled to receive,
without  payment  therefor,  other or additional  stock of the Company by way of
dividend  (other than as provided for in Section  2(b) below),  then and in each
such case,  upon the exercise of this  Warrant,  the Holder shall be entitled to
receive,  in addition to the number of shares of Common  Stock  receiv-


                                       B-1
<PAGE>

able, and without payment of any additional  consideration  therefor, the amount
of such other or additional  stock of the Company which the Holder would receive
on the date of such  exercise  had it been the  holder of record of such  Common
Stock on the date  hereof and had  thereafter,  during the period  from the date
hereof to and including the date of such  exercise,  retained such shares and/or
all other  additional stock receivable by it as aforesaid during such period and
given effect to all adjustments called for during such period by this Section 2.

          b.  ADJUSTMENT FOR CHANGES IN COMMON STOCK. In the event of changes in
the   outstanding   Common  Stock  of  the  Company  by  reason  of  split--ups,
recapitalizations,  reclassifications,  mergers, consolidations, combinations or
exchanges of shares, separations,  reorganizations,  liquidations,  or the like,
the number and class of shares  available under the Warrant in the aggregate and
the Warrant Price shall be correspondingly adjusted by the Board of Directors of
the Company.  The  adjustment  shall be such as will give the Holder on exercise
for the same aggregate Warrant Price the total number, class, and kind of shares
as the Holder would have owned had the Warrant been exercised prior to the event
and had the Holder continued to hold such shares until after the event requiring
adjustment.

     3. NO  FRACTIONAL  SHARES.  No  fractional  shares of Common  Stock will be
issued in connection with any  subscription  under this Warrant.  In lieu of any
fractional shares which would otherwise be issuable,  the Company shall pay cash
equal to the product of such fraction multiplied by the fair market value of one
share of Common Stock on the date of exercise as determined in good faith by the
Company's Board of Directors.

     4. NO STOCKHOLDER  RIGHTS. This Warrant shall not entitle its holder to any
of the rights of a stockholder of the Company prior to its exercise.

     5. RESERVATION OF STOCK. The Company  covenants that during the period this
Warrant is  exercisable,  the  Company  will  reserve  from its  authorized  and
unissued Common Stock a sufficient  number of shares to provide for the issuance
of Common Stock upon the exercise of this Warrant.  The Company  agrees that its
issuance of this Warrant shall constitute full authority to its officers who are
charged with the duty of executing  stock  certificates to execute and issue the
necessary  certificates  for shares of Common  Stock upon the  exercise  of this
Warrant.

     6. EXERCISE OF WARRANT.  This Warrant may be exercised by the Holder or its
registered  assigns,  in whole or in part and in minimum units of 10,000 shares,
by the  surrender  of this  Warrant  at the  principal  office  of the  Company,
together with the attached form of  subscription  duly executed,  accompanied by
payment in full of the amount of the Warrant Price in the form described in this
Warrant.  Upon  partial  exercise  of this  Warrant,  a new  warrant or warrants
containing  the same date and  provisions as this Warrant shall be issued by the
Company to the  registered  holder for the number of shares of Common Stock with
respect to which this Warrant shall not have been exercised.  A Warrant shall be
deemed to have been exercised  immediately prior to the close of business on the
date of its surrender for exercise as provided above, and the person entitled to
receive the shares of Common Stock  issuable upon such exercise shall be treated
for all  purposes  as the  holder  of such  shares  of record as of the close of
business on such date.  As promptly as  practicable  on or after such date,  the
Company shall issue and deliver to the person or persons entitled to receive the
shares,  a certificate or  certificates  for the number of full shares of Common
Stock issuable upon such exercise, together with cash in lieu of any fraction of
a share as provided above.

     7.  CERTIFICATE  OF  ADJUSTMENT.  Whenever the Warrant Price is adjusted as
provided in Section 2, the Company shall  promptly  deliver to the record holder
of this Warrant a  certificate  of an officer of the Company  setting  forth the
relevant  Warrant  Price or number of shares after such  adjustment  and setting
forth a brief statement of the facts requiring such adjustment.

     8.  COMPLIANCE  WITH  SECURITIES  ACT. The Holder,  by  acceptance  of this
Warrant,  agrees that this  Warrant and the shares of Common  Stock to be issued
upon its exercise (or shares of any security into which such Common Stock may be
converted)  (the "Shares") are being acquired for investment and that the Holder
will not offer,  sell,  or  otherwise  dispose of this Warrant and any shares of
Common  Stock to be issued upon its  exercise  (or shares of any  security  into
which such



                                       B-2
<PAGE>

Common Stock may be converted) except under  circumstances which will
not  result in a  violation  of the  Securities  Act of 1933,  as  amended  (the
"Securities  Act").  Upon exercise of this Warrant,  the holder hereof shall, if
requested  by the  Company,  confirm  in  writing  its  investment  purpose  and
acceptance of the restrictions on transfer of the Shares.

     9. SUBDIVISION OF WARRANT.  At the request of the holder of this Warrant in
connection  with a transfer  or  exercise  of a portion of the  Warrant and upon
surrender of this  Warrant for such  purpose to the Company,  the Company at its
expense  (except for any transfer tax payable)  will issue in exchange  therefor
warrants  of like  tenor and date  representing  in the  aggregate  the right to
purchase  such number of shares of such Common Stock as shall be  designated  by
such holder at the time of such surrender; provided, however, that the Company's
obligations to subdivide  securities  under this Section shall be subject to and
conditioned  upon the compliance of any such  subdivision  with applicable state
securities laws and with the Securities Act.

     10. LOSS, THEFT, DESTRUCTION, OR MUTILATION OF WARRANT. Upon receipt by the
Company  of  evidence  reasonably   satisfactory  to  it  of  the  loss,  theft,
destruction,  or mutilation of this Warrant,  and in the case of loss, theft, or
destruction,  of  indemnity  or  security  reasonably  satisfactory  to  it  and
reimbursement to the Company of all reasonable  expenses  incidental thereto, in
the case of mutilation,  and upon surrender and cancellation of this Warrant the
Company  will make and  deliver a new Warrant of like tenor and dates as of such
cancellation, in lieu of this Warrant.

     11. MISCELLANEOUS.  This Warrant shall be governed by the laws of the State
of California.  The headings in this Warrant are for purposes of convenience and
reference  only,  and shall not be deemed to  constitute a part of this Warrant.
Neither this Warrant nor any term included may be changed,  waived,  discharged,
or terminated  orally but only by an instrument in writing signed by the Company
and the Holder.  All notices  and other  communications  from the Company to the
Holder  shall  be by  telecopy  or  expedited  courier  service  to the  address
furnished to the Company in writing by the last holder of this Warrant who shall
have furnished an address to the Company in writing.

     12. EXERCISE PERIOD.  The Exercise Period shall mean the period  commencing
on June 15, 2000 and ending on June 15, 2004.

     ISSUED this 15th day of June, 1999.

                                  IMATRON INC.
                                  By
                                    ----------------------------------------
                                     S. Lewis Meyer, Chief Executive Officer

ATTEST:
- -----------------------------------------

                                       B-3
<PAGE>


                               FORM OF ASSIGNMENT
                                  IMATRON INC.

     FOR VALUE RECEIVED the undersigned  registered owner of this warrant hereby
sells, assigns, and transfers unto the Assignee named below all of the rights of
the undersigned  under the within Warrant,  with respect to the number of shares
of Common Stock set forth below.

Name of Assignee             Address                            Number of Shares

and does  hereby  irrevocably  constitute  and  appoint  Attorney  to make  such
transfer on the books of IMATRON  INC.  maintained  for the  purpose,  with full
power of substitution in the premises.

Dated:
      ---------------------------------

                                           ------------------------------------
                                           Name of Warrant Holder

                                           Signature:
                                                     --------------------------
Witness:
        -------------------------------



                                      B-4
<PAGE>

                               SUBSCRIPTION FORM
                                  IMATRON INC.
                 (To be executed only upon exercise of Warrant)

     The undersigned registered owner of this Warrant irrevocably exercises this
Warrant for and purchases ____________________ of the number of shares of Common
Stock of IMATRON INC.  purchasable with this Warrant, and herewith makes payment
therefor,  all at the price and on the terms and  conditions  specified  in this
Warrant.

Dated:
      -----------------------------------

                                           ------------------------------------
                                           (Signature of Registered Owner)

                                           ------------------------------------
                                           (Street Address)

                                           ------------------------------------
                                           (City) (State) (Zip Code)

                                      B-5
<PAGE>

                                   APPENDIX C

                     FORM OF COMMON STOCK PURCHASE WARRANT

THIS  WARRANT  AND THE  SHARES OF STOCK OF  IMATRON  INC TO BE  ISSUED  UPON ANY
EXERCISE  OF THIS  WARRANT  HAVE NOT BEEN  AND WILL NOT BE  REGISTERED  WITH THE
SECURITIES AND EXCHANGE COMMISSION UNDER THE SECURITIES ACT OF 1933, AS AMENDED,
OR UNDER  ANY  STATE  SECURITIES  LAW AND ANY  SALE,  TRANSFER,  PLEDGE OR OTHER
DISPOSITION  THEREOF  MAY BE MADE ONLY (I) IN A  REGISTRATION  UNDER SAID ACT OR
(II) IF AN  EXEMPTION  FROM  REGISTRATION  UNDER SAID ACT AND  APPLICABLE  STATE
SECURITIES  LAWS IS AVAILABLE AND THE COMPANY HAS RECEIVED AN OPINION OF COUNSEL
TO THAT EFFECT REASONABLY SATISFACTORY TO IT.

                                  IMATRON INC.

                          COMMON STOCK PURCHASE WARRANT
                  TO PURCHASE 2,991,027 SHARES OF COMMON STOCK
                                OF IMATRON INC.



Warrant No. 99-4

              THIS CERTIFIES  that,  subject  to the terms and conditions herein
set forth in this warrant,  TERRY L. ROSS (the "Holder") is entitled to purchase
from Imatron  Inc., a New Jersey  corporation  ("Company"),  at any time or from
time to time during the Exercise Period (defined in Section 12 below) the number
of fully paid and  non-assessable  shares of common  stock of the  Company  (the
"Shares") as provided  herein upon  surrender  of this Warrant at the  principal
office of the Company,  and, at the election of the Holder,  upon payment of the
purchase  price  at said  office  in cash or by  cashier's  check or by the wire
transfer of funds in a dollar  amount equal to the purchase  price of the Shares
for which the consideration is being given.

              This Warrant shall be exercisable for that number of Shares as set
forth above, in minimum units of 1,000 shares.

         1.   PURCHASE  PRICE. Subject  to  adjustment as hereinafter  provided,
the purchase  price of one share of Common Stock (or such  securities  as may be
substituted for one share of Common Stock pursuant to the provisions hereinafter
set forth) (the "Warrant  Price") shall One Dollar and  Three-tenths of One Cent
($1.003).

        2.    ADJUSTMENT  OF  WARRANT PRICE AND NUMBER OF SHARES. The number and
kind of  securities  issuable upon the exercise of this Warrant shall be subject
to adjustment from time to time upon the happening of certain events as follows:

              a.  ADJUSTMENT FOR DIVIDENDS IN STOCK.  If at any time on or after
the date  hereof,  the holders of the Common Stock of the Company (or any shares
of stock or other  securities at the time  receivable  upon the exercise of this
Warrant)  shall have  received,  or, on or after the  record  date fixed for the
determination of eligible  stockholders,  shall have become entitled to receive,
without  payment  therefor,  other or additional  stock of the Company by way of
dividend  (other than as provided for in Section  2(b) below),  then and in each
such case,  upon the exercise of this  Warrant,  the Holder shall be entitled to
receive,  in addition to the number of shares of Common  Stock  receiv-

                                      C-1
<PAGE>

able, and without payment of any additional  consideration  therefor, the amount
of such other or additional  stock of the Company which the Holder would receive
on the date of such  exercise  had it been the  holder of record of such  Common
Stock on the date  hereof and had  thereafter,  during the period  from the date
hereof to and including the date of such  exercise,  retained such shares and/or
all other  additional stock receivable by it as aforesaid during such period and
given effect to all adjustments called for during such period by this Section 2.

              b. ADJUSTMENT FOR CHANGES IN COMMON STOCK. In the event of changes
in the  outstanding  Common  Stock  of the  Company  by  reason  of  split--ups,
recapitalizations,  reclassifications,  mergers, consolidations, combinations or
exchanges of shares, separations,  reorganizations,  liquidations,  or the like,
the number and class of shares  available under the Warrant in the aggregate and
the Warrant Price shall be correspondingly adjusted by the Board of Directors of
the Company.  The  adjustment  shall be such as will give the Holder on exercise
for the same aggregate Warrant Price the total number, class, and kind of shares
as the Holder would have owned had the Warrant been exercised prior to the event
and had the Holder continued to hold such shares until after the event requiring
adjustment.

        3.    NO FRACTIONAL SHARES. No fractional shares of Common Stock will be
issued in connection with any  subscription  under this Warrant.  In lieu of any
fractional shares which would otherwise be issuable,  the Company shall pay cash
equal to the product of such fraction multiplied by the fair market value of one
share of Common Stock on the date of exercise as determined in good faith by the
Company's Board of Directors.

        4.    NO STOCKHOLDER RIGHTS. This Warrant shall not entitle  its  holder
to any of the rights of a stockholder of the Company prior to its exercise.

        5.    RESERVATION OF STOCK. The Company covenants that during the period
this Warrant is  exercisable,  the Company will reserve from its  authorized and
unissued Common Stock a sufficient  number of shares to provide for the issuance
of Common Stock upon the exercise of this Warrant.  The Company  agrees that its
issuance of this Warrant shall constitute full authority to its officers who are
charged with the duty of executing  stock  certificates to execute and issue the
necessary  certificates  for shares of Common  Stock upon the  exercise  of this
Warrant.

        6.    EXERCISE OF WARRANT.  This  Warrant may be exercised by the Holder
or its  registered  assigns,  in whole or in part and in minimum units of 10,000
shares, by the surrender of this Warrant at the principal office of the Company,
together with the attached form of  subscription  duly executed,  accompanied by
payment in full of the amount of the Warrant Price in the form described in this
Warrant.  Upon  partial  exercise  of this  Warrant,  a new  warrant or warrants
containing  the same date and  provisions as this Warrant shall be issued by the
Company to the  registered  holder for the number of shares of Common Stock with
respect to which this Warrant shall not have been exercised.  A Warrant shall be
deemed to have been exercised  immediately prior to the close of business on the
date of its surrender for exercise as provided above, and the person entitled to
receive the shares of Common Stock  issuable upon such exercise shall be treated
for all  purposes  as the  holder  of such  shares  of record as of the close of
business on such date.  As promptly as  practicable  on or after such date,  the
Company shall issue and deliver to the person or persons entitled to receive the
shares,  a certificate or  certificates  for the number of full shares of Common
Stock issuable upon such exercise, together with cash in lieu of any fraction of
a share as provided above.

        7.    CERTIFICATE OF ADJUSTMENT.  Whenever the Warrant Price is adjusted
as  provided  in Section 2, the  Company  shall  promptly  deliver to the record
holder of this Warrant a certificate of an officer of the Company  setting forth
the relevant Warrant Price or number of shares after such adjustment and setting
forth a brief statement of the facts requiring such adjustment.

        8   . COMPLIANCE WITH SECURITIES ACT. The Holder,  by acceptance of this
Warrant,  agrees that this  Warrant and the shares of Common  Stock to be issued
upon its exercise (or shares of any security into which such Common Stock may be
converted)  (the "Shares") are being acquired for investment and that the Holder
will not offer,  sell,  or  otherwise  dispose of this Warrant and any shares of
Common  Stock to be issued upon its  exercise  (or shares of any  security  into
which such



                                      C-2
<PAGE>

Common Stock may be converted) except under  circumstances which will not result
in a violation of the Securities Act of 1933, as amended (the "Securities Act").
Upon  exercise of this Warrant,  the holder  hereof  shall,  if requested by the
Company,  confirm  in writing  its  investment  purpose  and  acceptance  of the
restrictions on transfer of the Shares.

          9.  SUBDIVISION  OF  WARRANT.  At the  request  of the  holder of this
Warrant in  connection  with a transfer  or exercise of a portion of the Warrant
and upon surrender of this Warrant for such purpose to the Company,  the Company
at its expense  (except for any  transfer  tax  payable)  will issue in exchange
therefor warrants of like tenor and date representing in the aggregate the right
to purchase such number of shares of such Common Stock as shall be designated by
such holder at the time of such surrender; provided, however, that the Company's
obligations to subdivide  securities  under this Section shall be subject to and
conditioned  upon the compliance of any such  subdivision  with applicable state
securities laws and with the Securities Act.

        10.   LOSS, THEFT, DESTRUCTION, OR MUTILATION OF  WARRANT. Upon  receipt
by the Company of evidence  reasonably  satisfactory  to it of the loss,  theft,
destruction,  or mutilation of this Warrant,  and in the case of loss, theft, or
destruction,  of  indemnity  or  security  reasonably  satisfactory  to  it  and
reimbursement to the Company of all reasonable  expenses  incidental thereto, in
the case of mutilation,  and upon surrender and cancellation of this Warrant the
Company  will make and  deliver a new Warrant of like tenor and dates as of such
cancellation, in lieu of this Warrant.

        11.   MISCELLANEOUS. This  Warrant  shall be governed by the laws of the
State  of  California.  The  headings  in  this  Warrant  are  for  purposes  of
convenience  and reference only, and shall not be deemed to constitute a part of
this Warrant. Neither this Warrant nor any term included may be changed, waived,
discharged,  or terminated orally but only by an instrument in writing signed by
the  Company  and the Holder.  All  notices  and other  communications  from the
Company to the Holder shall be by telecopy or expedited  courier  service to the
address  furnished  to the Company in writing by the last holder of this Warrant
who shall have furnished an address to the Company in writing.

        12.   EXERCISE  PERIOD.  The  Exercise  Period  shall  mean  the  period
commencing on the date hereof and ending on June 15, 2000.


        ISSUED this 15th day of June, 1999.

                                       IMATRON INC.


                                       By
                                         ----------------------------
                                        S. Lewis Meyer, Chief Executive Officer
ATTEST:


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





                                      C-3
<PAGE>



                               FORM OF ASSIGNMENT
                                  IMATRON INC.


        FOR VALUE  RECEIVED  the  undersigned  registered  owner of this warrant
hereby sells,  assigns,  and transfers  unto the Assignee named below all of the
rights of the undersigned  under the within Warrant,  with respect to the number
of shares of Common Stock set forth below.

Name of Assignee               Address                    Number of Shares



and does hereby irrevocably constitute and appoint ____________________ Attorney
to make such transfer on the books of IMATRON INC.  maintained  for the purpose,
with full power of substitution in the premises.

Dated:
      ----------------------------

                                            ----------------------------------
                                            Name of Warrant Holder

                                            Signature:
                                                       -----------------------


Witness:
        ---------------------------


                                      C-4
<PAGE>
                                SUBSCRIPTION FORM
                                  IMATRON INC.

                 (To be executed only upon exercise of Warrant)

        The undersigned  registered owner of this Warrant irrevocably  exercises
this  Warrant  for and  purchases  ________________  of the  number of shares of
Common Stock of IMATRON INC.  purchasable with this Warrant,  and herewith makes
payment therefor,  all at the price and on the terms and conditions specified in
this Warrant.

Dated:
      ------------------------
                                            --------------------------------
                                            (Signature of Registered Owner)

                                            --------------------------------
                                                  (Street Address)

                                            --------------------------------
                                            (City)   (State)    (Zip Code)



                                      C-5
<PAGE>
                                   APPENDIX D

                                LOCK-UP AGREEMENT

              THIS LOCK-UP AGREEMENT (this "Agreement") is made this 14th day of
September, 1999 by and between IMATRON INC., a New Jersey corporation ("Seller")
and Terry Ross (the "Purchaser").

                                    RECITALS:

              WHEREAS,  Seller and  Purchaser  have  previously  entered into an
agreement for the purchase and sale of 3,767,713 shares of Seller's common stock
(the "Shares) and warrants to purchase 3,351,027 shares of Seller's common stock
(the "Warrants"); and

              WHEREAS,  pending the approval of the  foregoing  transaction  the
Nasdaq Stock Market,  Inc. has requested that Purchaser's rights with respect to
such shares be restricted as hereinafter provided.

              NOW, THEREFORE, the parties hereto agree as follows:

              1. Purchaser agrees that until Seller's shareholders have approved
of the purchase  and sale of the Shares and the Warrants in the manner  provided
under New Jersey law, Purchaser shall not sell, transfer or assign the Shares or
Warrants nor shall Purchase vote the Shares. Upon receipt of such approval, this
Agreement and the  obligation of Purchaser  pursuant  hereto shall be terminated
and shall thereafter be without any further force or effect.

              2. Seller agrees to promptly  notice and hold a special meeting of
its  shareholders  for the  purpose  of acting  upon a proposal  to approve  the
purchase and sale of the Shares and the Warrants.

              3. All other terms and  conditions  relating to the  purchase  and
sale of the Shares and Warrants shall remain in full force and effect.

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

                                            Purchaser:

                                                  ---------------------------
                                                             Terry Ross


                                            Seller:

                                                  Imatron Inc.

                                                  By
                                                    ---------------------------
                                                    Its Chief Executive Officer



                                      D-1


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