IMATRON INC
PRES14A, 1999-09-17
ELECTROMEDICAL & ELECTROTHERAPEUTIC APPARATUS
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                     U.S. SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                            SCHEDULE 14A INFORMATION

           Proxy Statement Pursuant to Section 14(A) of the Securities
                              Exchange Act of 1934

Filed by the Registrant [X]
Filed by a Party other than the Registrant [  ]

Check the appropriate box:
[X]  Preliminary Proxy Statement   [ ]  Confidential For Use of the Commission
                                        Only (as Permitted by Rule 14a-6(e) (2))
[ ]  Definitive Proxy Statement
[ ]  Definitive Additional Materials
[ ]  Soliciting Materials Pursuant to Rule 14a-11(c) or Rule 14a-12

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

    (Name of Person(s) Filing Proxy Statement, if Other Than the Registrant)

Payment of Filing Fee (Check the appropriate box):

[X] No fee required.

[ ] Fee computed on table below per Exchange Act Rules 14a-6(i) (1) and 0-11.

    (1) Title of each class of securities to which transaction applies:

        -----------------------------------------------------------------------
    (2) Aggregate number of securities to which transaction applies:

        -----------------------------------------------------------------------
    (3) Per unit price or other underlying value of transaction  computed
        pursuant to Exchange Act Rule 0-11 (set forth the amount on which
        the filing fee is calculated and state how it was determined):

        -----------------------------------------------------------------------
    (4) Proposed maximum aggregate value of transaction:

        -----------------------------------------------------------------------
    (5) Total Fee Paid:

        -----------------------------------------------------------------------
[ ] Fee paid previously with preliminary materials.

[ ] Check box if any part of the fee is offset as provided by Exchange Act
    Rule 0-11(a) (2) and identify  the filing for which the  offsetting  fee
    was paid  previously.  Identify  the  previous  filing  by  registration
    statement number, or the form or schedule and the date of its filing.

    (1) Amount Previously Paid:

        -----------------------------------------------------------------------
    (2) Form, Schedule or Registration Statement No.:

        -----------------------------------------------------------------------
    (3) Filing Party:

        -----------------------------------------------------------------------
    (4) Date Filed:

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

<PAGE>

                                  IMATRON INC.
                           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.

        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.

                                    By Order of the Board of Directors,



                                    S. Lewis Meyer
                                    Chief Executive Officer

South San Francisco, California
September 27, 1999


                                        1
<PAGE>


                                  IMATRON INC.
                           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 ___________
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; ABSTENTIONS 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 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


                                        1
<PAGE>

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 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

                                        2
<PAGE>

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 10.9% 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 tables, 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 OWNER(aa)
<TABLE>
<CAPTION>
- -------------------------------------------------------------------------------------------------
                          Name and Address of     Amount of Direct
Title of Class            Beneficial Owner        Beneficial Ownership    Percent of Class
- --------------            -------------------     --------------------    ----------------
- -------------------------------------------------------------------------------------------------
<S>                       <C>                     <C>                     <C>
Common                    Marukin Corporation(bb) 5,471,617               5.8%

- -------------------------------------------------------------------------------------------------
</TABLE>

- -------------------------------------
(aa) 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.

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

                                        4

<PAGE>

SECURITY OWNERSHIP OF DIRECTORS AND EXECUTIVE OFFICERS

        The table below presents the security ownership of the Company's
Directors and Named Executive Officers.

<TABLE>
<CAPTION>
- -------------------------------------------------------------------------------------------------
                        Name of Beneficial Owner      Amount and Nature of     Percent of Class(2)
Title of Class          ------------------------     Beneficial Ownership(1)   -------------------
- --------------                                       -----------------------
- -------------------------------------------------------------------------------------------------
<S>                    <C>                               <C>                        <C>
Common                 Douglas P. Boyd                   2,065,177(3)               2.2%
- -------------------------------------------------------------------------------------------------
Common                 John L. Couch                        34,625(4)                  *
- -------------------------------------------------------------------------------------------------
Common                 William J. McDaniel, M.D.            82,500(5)                  *
- -------------------------------------------------------------------------------------------------
Common                 S. Lewis Meyer                      629,058(6)                  *
- -------------------------------------------------------------------------------------------------
Common                 Terry Ross                        7,444,990(7)               7.5%
- -------------------------------------------------------------------------------------------------
Common                 Aldo Test                           126,250(8)                  *
- -------------------------------------------------------------------------------------------------
Common                 All Directors and                10,382,600(9)              10.9%
                       Executive Officers as a Group
- -------------------------------------------------------------------------------------------------
</TABLE>

                             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.










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

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

(1) Ownership is direct unless indicated otherwise.
(2) Calculation based on 94,933,749 shares of Common Stock outstanding as of
September 10,1999.
(3) Includes 2,055,801 shares owned directly and 9,376 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) 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.
(5) 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.
(6) Includes 616,558 shares owned directly and 12,500 shares issuable upon the
exercise of stock options exercisable as of September 10,1999 or that will
become exercisable within 60 days thereafter.
(7) Includes 3,831,463 shares owned directly, 162,500 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.
(8) 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.
(9) Percentage of beneficial ownership assumes the exercise of the aforesaid
options by officers and directors.


                                        5

<PAGE>


                           SUMMARY COMPENSATION TABLE

<TABLE>
<CAPTION>
- -------------------------------------------------------------------------------------------
                                                           Long Term
                                Annual                   Compensation        All Other
                             Compensation                   Awards        Compensation(b)
- -------------------------------------------------------------------------------------------
Name and Principal                                         Options/
     Position        Year   Salary($)(a)       Bonus         Sars
   ------------      ----   ------------       -----       --------
- -------------------------------------------------------------------------------------------
<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>

(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

                                        6

<PAGE>

expressed 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.

        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 April 30, 1999, 76,398 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 April 30, 1999, a total of 176 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.

                                        7
<PAGE>

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) otherwise 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 April 30, 1999
approximately 176 employees and consultants 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, as well as
options granted to Mr. Ross during the current fiscal year:



                                        8
<PAGE>

                      OPTION/SAR GRANTS IN LAST FISCAL YEAR

===============================================================================

===============================================================================

===============================================================================

                                                 Potential Realizable Value
             Individual Grants                   at Assumed Annual Rates
                                                 of Stock Price Appreciation
                                                 For Option Term

===============================================================================


<TABLE>
<CAPTION>
                              % Of Total
                 Number of     Options
                 Securities    Granted
                 Under            to
                  Options    Employees in   Exercise or
                  Granted       Fiscal     Base Price   Market   Expiration
     NAME           (#)          YEAR         ($/SH)    PRICE       DATE        0%($)     5%($)(C)
     ----         --------   ------------  ------------ ------   ----------     -----     --------
<S>                  <C>        <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

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

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

Terry Ross           -0-(d)
</TABLE>

        (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) 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 to date. 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).


                                        9
<PAGE>

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 ($)
                                                             exercisable/
                                                             unexercisable            exercisable/
                     Shares acquired                         -------------            unexercisable
                     on exercise (#)        Value                                     --------------
Name                 ---------------      realized($)
- ----                                     ----------
<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 are 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.

                      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:
        *Link rewards to business results and stockholder returns;
        *Encourage  creation of stockholder  value and  achievement of strategic
        objectives;
        *Maintain an  appropriate  balance  between base salary and
        short-and  long-term  incentive  opportunity;
        *Attract and retain, on a long-term basis, highly qualified executive
        personnel; and
        *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.


                                       10
<PAGE>
                    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.

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

                                       11
<PAGE>

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 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 include
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.

                                       12
<PAGE>


                                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 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.

                                       13
<PAGE>

        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 were 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.

                                       14
<PAGE>

                         TEN-YEAR OPTION/SAR REPRICINGS
<TABLE>
<CAPTION>
- -------------------------------------------------------------------------------------------
                            Number of     Market
                            Securities   Price of     Exercise       New       Length of
                            Under        Stock at     Price at     Exercise     Original
                            Options       Time of      time of      Price        Option
    Name          Date       Repriced    Repricing    Repricing      ($)          Term
- -------------------------------------------------------------------------------------------
<S>             <C>           <C>          <C>          <C>         <C>         <C>
 Douglas P.     10/23/98      75,008       $1.50        $2.56       $1.50       2/24/08
    Boyd,
  Chairman
- -------------------------------------------------------------------------------------------
  S. Lewis      10/23/98     100,000       $1.50        $2.56       $1.50       2/24/08
Meyer, Chief
  Executive
   Officer
- -------------------------------------------------------------------------------------------
   Gary H.      10/23/98      50,000       $1.50        $2.56       $1.50       2/24/98
   Brooks,
    Chief
  Financial
   Officer
  (through
  8/31/99)
- -------------------------------------------------------------------------------------------
</TABLE>

        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 provided  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
_____, 1999


                                    THE BOARD OF DIRECTORS


                                       15
<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 any applicable state acts or pursuant to Rule 144 or


                                      A-1
<PAGE>

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.

              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.

                                      A-2
<PAGE>

        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 examinations,  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

                                      A-3
<PAGE>

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 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.

                                      A-4
<PAGE>

              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.

              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

                                      A-5
<PAGE>

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 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

                                      A-6
<PAGE>

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  receivable,  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-1
<PAGE>

                 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 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


                                      B-2
<PAGE>

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.

                       This Warrant Expires June 15, 2000


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  receivable,  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.

                                      C-1
<PAGE>

              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 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


                                      C-2
<PAGE>

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
<PAGE>

                                  IMATRON INC.

               PROXY SOLICITED ON BEHALF OF THE BOARD OF DIRECTORS

                                OCTOBER 29, 1999

        The undersigned shareholder of Imatron Inc. (the "Company") hereby
appoints S. Lewis Meyer with full power of substitution, the true and lawful
attorney, agent and proxyholder of the undersigned, to vote all of the shares of
Common Stock of the Company held of record by the undersigned on September 17,
1999, at the Special Meeting of Shareholders of the Company to be held on
October 29, 1999 (the "Special Meeting") at 9:00 a.m. at the Company's offices
located at 389 Oyster Point Boulevard, South San Francisco, California 94080 and
any adjournments or postponements thereof, hereby ratifying all that said proxy
or his substitute may do by virtue hereof, and the undersigned authorizes and
instructs said proxy to vote as follows:

{X}     PLEASE MARK VOTES AS IN THIS EXAMPLE

THE SHARES REPRESENTED BY THIS PROXY WILL BE VOTED IN THE MANNER DIRECTED. IN
THE ABSENCE OF DIRECTION, THE SHARES WILL BE VOTED FOR THE PROPOSALS.

THE UNDERSIGNED ACKNOWLEDGES RECEIPT OF THE NOTICE OF SPECIAL MEETING OF
SHAREHOLDERS.

        (1)   To ratify the sale of Common Stock and Warrants to the Company's
President as part of a private placement.


              [ ] FOR           [ ]  AGAINST         [ ] ABSTAIN


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


              [ ] FOR          [ ]  AGAINST          [ ] ABSTAIN


        and, in his  discretion,  upon any other matter that may  properly  come
before the meeting or any adjournment or postponement thereof.

PLEASE DATE AND SIGN THE PROXY CARD BELOW. IF STOCK IS REGISTERED IN THE NAME OF
TWO OR MORE PERSONS, EACH MUST SIGN. WHEN SIGNING AS ATTORNEY, EXECUTOR,
ADMINISTRATOR, TRUSTEE OR GUARDIAN, PLEASE GIVE FULL TITLE AS SUCH. IF A
CORPORATION, PLEASE SIGN IN FULL CORPORATE NAME BY THE PRESIDENT OR OTHER
AUTHORIZED OFFICER. IF A PARTNERSHIP, PLEASE SIGN IN PARTNERSHIP NAME BY AN
AUTHORIZED PERSON.

           YOUR VOTE IS IMPORTANT, PLEASE FILL IN AND RETURN PROMPTLY.



                                    Dated:                     , 1999
                                          ---------------------


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

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


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