Document:

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                                                                    Exhibit 10.1

                               R2 TECHNOLOGY, INC.

                                 1993 STOCK PLAN

     1. Purposes of the Plan. The purposes of this Stock Plan are to attract and
        --------------------
retain the best available personnel for positions of substantial responsibility,
to provide additional incentive to Employees and Consultants of the Company and
its Subsidiaries and to promote the success of the Company's business. Options
granted under the Plan may be incentive stock options (as defined under Section
422 of the Code) or non-statutory stock options as determined by the
Administrator at the time of grant of an option and subject to the applicable
provisions of Section 422 of the Code, as amended, and the regulations
promulgated thereunder. Stock purchase rights may also be granted under the
Plan.

     2. Definitions. As used herein, the following definitions shall apply:
        -----------

        (a) "Administrator" means the Board or any of its Committees appointed
             -------------
pursuant to Section 4 of the Plan.

        (b) "Board" means the Board of Directors of the Company.
             -----

        (c) "Code" means the Internal Revenue Code of 1986, as amended.
             ----

        (d) "Committee" means a Committee appointed by the Board of Directors in
             ---------
accordance with Section 4 of the Plan.

        (e) "Common Stock" means the Common Stock of the Company.
             ------------

        (f) "Company" means R2 Technology, Inc., a California corporation.
             -------

        (g) "Consultant" means any person, including an advisor, who is
             ----------
engaged by the Company or any Parent or Subsidiary to render services and is
compensated for such services, and any director of the Company whether
compensated for such services or not, provided that if and in the event the
Company registers any class of any equity security pursuant to the Exchange Act,
the term Consultant shall thereafter not include directors who are not
compensated for their services or are paid only a director's fee by the Company.

        (h) "Continuous Status as an Employee or Consultant" means that the
             ----------------------------------------------
employment or consulting relationship is not interrupted or terminated by the
Company, any Parent or Subsidiary. Continuous Status as an Employee or
Consultant shall not be considered interrupted in the case of: (i) any leave of
absence approved by the Board, including sick leave, military leave, or any
other personal leave; provided, however, that for purposes of Incentive Stock
Options, any such leave may not exceed ninety (90) days, unless reemployment
upon the expiration of such leave is guaranteed by contract (including certain
Company policies) or statute; provided, further, that on the ninety-first (91st)
day of any such leave (where reemployment is not guaranteed by contract or
statute) the Optionee's Incentive Stock Option

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shall automatically convert to a Nonstatutory Stock Optionor (ii) transfers
between locations of the Company or between the Company, its Parent, its
Subsidiaries or its successor.

          (i) "Employee" means any person, including officers and directors,
               --------
employed by the Company or any Parent or Subsidiary of the Company. The payment
of a director's fee by the Company shall not be sufficient to constitute
"employment" by the Company.

          (j) "Exchange Act" means the Securities Exchange Act of 1934, as
               ------------
amended.

          (k) "Fair Market Value" means, as of any date, the value of Common
               -----------------
Stock determined as follows:

              (i)   If the Common Stock is listed on any established stock
exchange or a national market system, including without limitation the National
Market System of the National Association of Securities Dealers, Inc. Automated
Quotation ("NASDAQ") System, its Fair Market Value shall be the closing sales
price for such stock (or the closing bid, if no sales were reported, as quoted
on such exchange or system for the last market trading day prior to the time of
determination) as reported in The Wall Street Journal or such other source as
the Administrator deems reliable;

              (ii)  If the Common Stock is quoted on the NASDAQ System (but not
on the National Market System thereof) or regularly quoted by a recognized
securities dealer but selling prices are not reported, its Fair Market Value
shall be the mean between the high bid and low asked prices for the Common Stock
or;

              (iii) In the absence of an established market for the Common
Stock, the Fair Market Value thereof shall be determined in good faith by the
Administrator.

          (l) "Incentive Stock Option" means an Option intended to qualify as an
               ----------------------
incentive stock option within the meaning of Section 422 of the Code.

          (m) "Nonstatutory Stock Option" means an Option not intended to
               -------------------------
qualify as an Incentive Stock Option.

          (n) "Officer" means a person who is an officer of the Company within
               -------
the meaning of Section 16 of the Exchange Act and the rules and regulations
promulgated thereunder.

          (o) "Option" means a stock option granted pursuant to the Plan.
               ------

          (p) "Optioned Stock" means the Common Stock subject to an Option or a
               --------------
Stock Purchase Right.

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          (q) "Optionee" means an Employee or Consultant who receives an Option
               --------
or Stock Purchase Right.

          (r) "Parent" means a "parent corporation", whether now or hereafter
               ------
existing, as defined in Section 424(e) of the Code.

          (s) "Plan" means this 1993 Stock Plan.
               ----

          (t) "Restricted Stock" means shares of Common Stock acquired pursuant
               ----------------
to a grant of a Stock Purchase Right under Section 11 below.

          (u) "Share" means a share of the Common Stock, as adjusted in
               -----
accordance with Section 12 below.

          (v) "Stock Purchase Right" means the right to purchase Common Stock
               --------------------
pursuant to Section 11 below.

          (w) "Subsidiary" means a "subsidiary corporation", whether now or
               ----------
hereafter existing, as defined in Section 424(f) of the Code.

     3.   Stock Subject to the Plan. Subject to the provisions of Section 12 of
          -------------------------
the Plan, the maximum aggregate number of shares which may be optioned and sold
under the Plan is 500,000 shares of Common Stock. The shares may he authorized,
but unissued, or reacquired Common Stock.

          If an Option or Stock Purchase Right should expire or become
unexercisable for any reason without having been exercised in full, the
unpurchased Shares which were subject thereto shall, unless the Plan shall have
been terminated, become available for future grant under the Plan.

     4.   Administration of the Plan.
          --------------------------

          (a) Initial Plan Procedure. Prior to the date, if any, upon which the
              ----------------------
Company becomes subject to the Exchange Act, the Plan shall be administered by
the Board or a committee appointed by the Board.

          (b) Plan Procedure After the Date, if any, up, on Which the Company
              ---------------------------------------------------------------
becomes, Subject to the Exchange Act.
------------------------------------

              (i) Administration With Respect to Directors and Officers. With
                  -----------------------------------------------------
respect to grants of Options or Stock Purchase Rights to Employees who are also
officers or directors of the Company, the Plan shall be administered by (A) the
Board if the Board may administer the Plan in compliance with Rule 16b-3
promulgated under the Exchange Act or any successor thereto ("Rule 16b-3") with
respect to a plan intended to qualify thereunder as a

                                      -3-

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discretionary plan, or (B) a committee designated by the Board to administer the
Plan, which committee shal1 be constituted in such a manner as to permit the
Plan to comply with Rule 16b-3 with respect to a plan intended to qualify
thereunder as a discretionary plan. Once appointed, such Committee shall
continue to serve in its designated capacity until otherwise directed by the
Board. From time to time the Board may increase the size of the Committee and
appoint additional members thereof, remove members (with or without cause) and
appoint new members in substitution therefor, fil1 vacancies, however caused,
and remove all members of the Committee and thereafter directly administer the
Plan, all to the extent permitted by Rule 16b-3 with respect to a plan intended
to qualify thereunder as a discretionary plan.

               (ii)   Multiple Administrative Bodies. If permitted by Rule
                      ------------------------------
16b-3, the Plan may be administered by different bodies with respect to
directors, non-director officers and Employees who are neither directors nor
officers.

               (iii)  Administration With Respect to Consultants and Other
                      ----------------------------------------------------
Employees. With respect to grants of Options or Stock Purchase Rights to
---------
Employees or Consultants who are neither directors nor officers of the Company,
the Plan shall be administered by (A) the Board or (B) a committee designated
by the Board, which committee shall be constituted in such a manner as to
satisfy the legal requirements relating to the administration of incentive stock
option plans, if any, of [state] corporate and securities laws, of the Code, and
of any applicable stock exchange (the "Applicable Laws"). Once appointed, such
Committee shall continue to serve in its designated capacity until otherwise
directed by the Board. From time to time the Board may increase the size of the
Committee and appoint additional members thereof, remove members (with or
without cause) and appoint new members in substitution therefor, fill vacancies,
however caused, and remove all members of the Committee and thereafter directly
administer the Plan, all to the extent permitted by the Applicable Laws.

          (c)  Powers of the Administrator. Subject to the provisions of the
               ---------------------------
Plan and, in the case of a Committee, the specific duties delegated by the Board
to such Committee, and subject to the approval of any relevant authorities,
including the approval, if required, of any stock exchange upon which the Common
Stock is listed, the Administrator shall have the authority, in its discretion:

               (i)    to determine the Fair Market Value of the Common Stock, in
accordance with Section 2(k) of the Plan;

               (ii)   to select the Consultants and Employees to whom Options
and Stock Purchase Rights may from time to time be granted hereunder;

               (iii)  to determine whether and to what extent Options and Stock
Purchase Rights or any combination thereof are granted hereunder;

               (iv)   to determine the number of shares of Common Stock to be
covered by each such award granted hereunder;

                                       -4-

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               (v)    to approve forms of agreement for use under the Plan;

               (vi)   to determine the terms and conditions, not inconsistent
with the terms of the Plan, of any award granted hereunder;

               (vii)  to determine whether and under what circumstances an
Option may be settled in cash under subsection 9(f) instead of Common Stock;

               (viii) to reduce the exercise price of any Option to the then
current Fair Market Value if the Fair Market Value of the Common Stock covered
by such Option shall have declined since the date the Option was granted;

               (ix)   to determine the terms and restrictions applicable to
Stock Purchase Rights and the Restricted Stock purchased by exercising such
Stock Purchase Rights; and

               (x)    to construe and interpret the terms of the Plan and awards
granted pursuant to the Plan.

          (d)  Effect of Administrator's Decision. All decisions, determinations
               ----------------------------------
and interpretations of the Administrator shall be final and binding on all
Optionees and any other holders of any Options or Stock Purchase Rights.

     5.   Eligibility.
          -----------

          (a)  Nonstatutory Stock Options and Stock Purchase Rights may be
granted to Employees and Consultants. Incentive Stock Options may be granted
only to Employees. An Employee or Consultant who has been granted an Option or
Stock Purchase Right may, if otherwise eligible, be granted additional Options
or Stock Purchase Rights.

          (b)  Each Option shall be designated in the written option agreement
as either an Incentive Stock Option or a Nonstatutory Stock Option. However,
notwithstanding such designations, to the extent that the aggregate Fair Market
Value of the Shares with respect to which Options designated as Incentive Stock
Options are exercisable for the first time by any Optionee during any calendar
year (under all plans of the Company or any Parent or Subsidiary) exceeds
$100,000, such excess Options shall be treated as Nonstatutory Stock Options.

          (c)  For purposes of Section 5(b), Incentive Stock Options shall be
taken into account in the order in which they were granted, and the Fair Market
Value of the Shares shall be determined as of the time the Option with respect
to such Shares is granted.

          (d)  The Plan shall not confer upon any Optionee any right with
respect to continuation of employment relationship with the Company, nor shall
it interfere in any way with his or her right or the Company's right to
terminate his or her employment relationship at any time, with or without cause.

                                       -5-

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          (e)  The following limitations shall apply to grants of Options to
Officers:

               (i)  No Officer shall be granted, in any fiscal year of the
Company, Options to purchase more than [______] Shares, provided that, a
newly-hired Officer may in addition receive a one-time grant of up to [______]
Shares upon acceptance of employment with the Company; and

               (ii) Over the remaining term of the Plan, no Officer shall be
granted Options to purchase more than [______] Shares.

     The limitations set forth in this Section 5(e) are intended to satisfy the
requirements applicable to Options intended to qualify as "performance-based
compensation" (within the meaning of Section 162(m) of the Code). In the event
the Administrator determines that such limitations are not required to qualify
Options as performance-based compensation, the Administrator may modify or
eliminate such limitations.

     6.   Term of Plan. The Plan shall become effective upon the earlier to
          ------------
occur of its adoption by the Board of Directors or its approval by the
shareholders of the Company, as described in Section 18 of the Plan. It shall
continue in effect for a term of ten (10) years unless sooner terminated under
Section 14 of the Plan.

     7.   Term of Option. The term of each Option shall be the term stated in
          --------------
the Option Agreement; provided, however, that the term shall be no more than ten
(10) years from the date of grant thereof. However, in the case of an Incentive
Stock Option granted to an Optionee who, at the time the Option is granted, owns
stock representing more than ten percent (10%) of the voting power of all
classes of stock of the Company or any Parent or Subsidiary, the term of the
Option shall be five (5) years from the date of grant thereof or such shorter
term as may be provided in the Option Agreement.

     8.   Option Exercise Price and Consideration.
          ---------------------------------------

          (a)  The per share exercise price for the Shares to be issued pursuant
to exercise of an Option shall be such price as is determined by the Board, but
shall be subject to the following:

               (i)  In the case of an Incentive Stock Option

                    (A)  granted to an Employee who, at the time of the grant
of such Incentive Stock Option, owns stock representing more than ten percent
(10%) of the voting power of all classes of stock of the Company or any Parent
or Subsidiary, the per Share exercise price shall be no less than 110% of the
Fair Market Value per Share on the date of grant.

                    (B)  granted to any Employee, the per Share exercise price
shall be no less than 100% of the Fair Market Value per Share on the date of
grant.

                                       -6-

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              (ii)  In the case of a Nonstatutory Stock Option

                    (A) granted to a person who, at the time of the grant of
such Option, owns stock representing more than ten pertint (10%) of the voting
power of all classes of stock of the Company or any Parent or Subsidiary, the
per Share exercise price shall be no less than 110% of the Fair Market Value per
Share on the date of the grant.

                    (B) granted to any person, the per Share exercise price
shall be no less than 85% of the Fair Market Value per Share on the date of
grant.

         (b)  The consideration to be paid for the Shares to be issued upon
exercise of an Option, including the method of payment, shall be determined by
the Administrator (and, in the case of an Incentive Stock Option, shall be
determined at the time of grant) and may consist entirely of (1) cash, (2)
check, (3) promissory note, (4) other Shares which (x) in the case of Shares
acquired upon exercise of an Option, have been owned by the Optionee for more
than six months on the date of surrender, and (y) have a Fair Market Value on
the date of surrender equal to the aggregate exercise price of the Shares as to
which said Option shall be exercised, (5) delivery of a properly executed
exercise notice together with such other documentation as the Administrator and
the broker, if applicable, shall require to effect an exercise of the Option and
delivery to the Company of the sale or loan proceeds required to pay the
exercise price, or (6) any combination of the foregoing methods of payment. In
making its determination as to the type of consideration to accept, the Board
shall consider if acceptance of such consideration may be reasonably expected to
benefit the Company.

     9.  Exercise of Option
         ------------------

         (a)  Procedure for Exercise: Rights as a Shareholder. Any Option
              -----------------------------------------------
granted hereunder shall be exercisable at such times and under such conditions
as determined by the Board, including performance criteria with respect to the
Company and/or the Optionee, and as shall be permissible under the terms of the
Plan.

              An Option may not be exercised for a fraction of a Share.

              An Option shall be deemed to be exercised when written notice of
such exercise has been given to the Company in accordance with the terms of the
Option by the person entitled to exercise the Option and full payment for the
Shares with respect to which the Option is exercised has been received by the
Company. Full payment may, as authorized by the Board, consist of any
consideration and method of payment allowable under Section 8(b) of the Plan.
Until the issuance (as evidenced by the appropriate entry on the books of the
Company or of a duly authorized transfer agent of the Company) of the stock
certificate evidencing such Shares, no right to vote or receive dividends or any
other rights as a shareholder shall exist with respect to the Optioned Stock,
notwithstanding the exercise of the Option. The Company shall issue (or cause to
be issued) such stock certificate promptly upon exercise of the Option. No

                                       -7-

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adjustment will be made for a dividend or other right for which the record date
is prior to the date the stock certificate is issued, except as provided in
Section 12 of the Plan.

              Exercise of an Option in any manner shall result in a decrease in
the number of Shares which thereafter may be available, both for purposes of the
Plan and for sale under the Option, by the number of Shares as to which the
Option is exercised.

         (b)  Termination of Employment or Consulting Relationship. In the event
              ----------------------------------------------------
of termination of an Optionee's Continuous Status as an Employee or Consultant
with the Company (but not in the event of an Optionee's change of status from
Employee to Consultant (in which case an Employee's Incentive Stock Option shall
automatically convert to a Nonstatutory Stock Option on the ninety-first (91st)
day following such change of status) or from Consultant to Employee), such
Optionee may, but only within such period of time as is determined by the
Administrator, of at least thirty (30) days, with such determination in the case
of an Incentive Stock Option not exceeding three (3) months after the date of
such termination (but in no event later than the expiration date of the term of
such Option as set forth in the Option Agreement), exercise his or her Option to
the extent that Optionee was entitled to exercise it at the date of such
termination. To the extent that Optionee was not entitled to exercise the Option
at the date of such termination, or if Optionee does not exercise such Option to
the extent so entitled within the time specified herein, the Option shall
terminate.

         (c)  Disability of Optionee. Notwithstanding the provisions of Section
              ----------------------
9(b) above, in the event of termination of an Optionee's Continuous Status as an
Employee or Consultant as a result of his total and permanent disability (as
defined in Section 22(e)(3) of the Code), Optionee may, but only within twelve
(12) months from the date of such termination (but in no event later than the
expiration dare of the term of such Option as set forth in the Option
Agreement), exercise the Option to the extent otherwise entitled to exercise it
at the date of such termination. To the extent that Optionee was not entitled to
exercise the Option at the date of termination, or if Optionee does not exercise
such Option to the extent so entitled within the time specified herein, the
Option shall terminate.

         (d)  Death of Optionee. In the event of termination of an Optionee's
              -----------------
Continuous Status as an Employee or Consultant as a result of the death of an
Optionee, the Option may be exercised, at any time within twelve (12) months
following the date of death (but in no event later than the expiration date of
the term of such Option as set forth in the Option Agreement), by the Optionee's
estate or by a person who acquired the right to exercise the Option by bequest
or inheritance, but only to the extent the Optionee was entitled to exercise the
Option at the date of death. To the extent that Optionee was nor entitled to
exercise the Option at the date of death, or if Optionee does not exercise such
Option to the extent so entitled within the time specified herein, the Option
shall terminate.

         (e)  Rule 16b-3. Options granted to persons subject to Section 16(b)
              ----------
of the Exchange Act must comply with Rule 16b-3 and shall contain such
additional conditions or

                                       -8-

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restrictions as may be required thereunder to qualify for the maximum exemption
from Section 16 of the Exchange Act with respect to Plan transactions.

         (f)  Buyout Provisions. The Administrator may at any time offer to buy
              -----------------
out for a payment in cash or Shares, an Option previously granted, based on such
terms and conditions as the Administrator shall establish and communicate to the
Optionee at the time that such offer is made.

     10. Non-Transferability of Options and Stock Purchase Rights. Options and
         --------------------------------------------------------
Stock Purchase Rights may not be sold, pledged, assigned, hypothecated,
transferred, or disposed of in any manner other than by will or by the laws of
descent or distribution and may be exercised, during the lifetime of the
Optionee, only by the Optionee.

     11. Stock Purchase Rights.
         ---------------------

         (a)  Rights to Purchase. Stock Purchase Rights may be issued either
              ------------------
alone, in addition to, or in tandem with other awards granted under the Plan
and/or cash awards made outside of the Plan. After the Administrator determines
that it will offer Stock Purchase Rights under the Plan, it shall advise the
offeree in writing of the terms, conditions and restrictions related to the
offer, including the number of Shares that such person shall be entitled to
purchase, the price to be paid, and the time within which such person must
accept such offer, which shall in no event exceed [thirty (30) days] from the
date upon which the Administrator made the determination to grant the Stock
Purchase Right. The offer shall be accepted by execution of a Restricted Stock
purchase agreement in the form determined by the Administrator. Shares purchased
pursuant to the grant of a Stock Purchase Right shall be referred to herein as
"Restricted Stock."

         (b)  Repurchase Option. Unless the Administrator determines otherwise,
              -----------------
the Restricted Stock purchase agreement shall grant the Company a repurchase
option exercisable upon the voluntary or involuntary termination of the
purchaser's employment with the Company for any reason (including death or
Disability). The purchase price for Shares repurchased pursuant to the
Restricted Stock purchase agreement shall be the original price paid by the
purchaser and may be paid by cancellation of any indebtedness of the purchaser
to the Company. The repurchase option shall lapse at such rate as the
Administrator may determine, but at a minimum rate of 20% per year.

         (c)  Other Provisions. The Restricted Stock purchase agreement shall
              ----------------
contain such other terms, provisions and conditions not inconsistent with the
Plan as may be determined by the Administrator in its sole discretion. In
addition, the provisions of Restricted Stock purchase agreements need not be the
same with respect to each purchaser.

         (d)  Rights as a Shareholder. Once the Stock Purchase Right is
              -----------------------
exercised, the purchaser shall have the rights equivalent to those of a
shareholder, and shall be a shareholder when his or her purchase is entered upon
the records of the duly authorized transfer agent of the

                                       -9-

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Company. No adjustment will be made for a dividend or other right for which the
record date is prior to the date the Stock Purchase Right is exercised, except
as provided in Section 12 of the Plan.

     12. Adjustments Upon Changes in Capitalization or Merger.
         ----------------------------------------------------

         (a) Changes in Capitalization. Subject to any required action by the
             -------------------------
shareholders of the Company, the number of shares of Common Stock covered by
each outstanding Option or Stock Purchase Right, and the number of shares of
Common Stock which have been authorized for issuance under the Plan but as to
which no Options or Stock Purchase Rights have yet been granted or which have
been returned to the Plan upon cancellation or expiration of an Option or Stock
Purchase Right, as well as the price per share of Common Stock covered by each
such outstanding Option or Stock Purchase Right, shall be proportionately
adjusted for any increase or decrease in the number of issued shares of Common
Stock resulting from a stock split, reverse stock split, stock dividend,
combination or reclassification of the Common Stock, or any other increase or
decrease in the number of issued shares of Common Stock effected without receipt
of consideration by the Company; provided, however, that conversion of any
convertible securities of the Company shall not be deemed to have been "effected
without receipt of consideration." Such adjustment shall be made by the Board,
whose determination in that respect shall be final, binding and conclusive.
Except as expressly provided herein, no issuance by the Company of shares of
stock of any class, or securities convertible into shares of stock of any class,
shall affect, and no adjustment by reason thereof shall be made with respect to,
the number or price of shares of Common Stock subject to an Option or Stock
Purchase Right.

         (b) Dissolution or Liquidation. In the event of the proposed
             --------------------------
 dissolution or liquidation of the Company, the Board shall notify the Optionee
 at least fifteen (15) days prior to such proposed action. To the extent it has
 not been previously exercised, the Option or Stock Purchase Right will
 terminate immediately prior to the consummation of such proposed action.

         (c) Merger. In the event of a merger of the Company with or into
             ------
another corporation, the Option or Stock Purchase Right shall be assumed or an
equivalent option or right shall be substituted by such successor corporation or
a parent or subsidiary of such successor corporation. If, in such event, the
Option or Stock Purchase Right is not assumed or substituted, the Option or
Stock Purchase Right shall terminate as of the date of the closing of the
merger. For the purposes of this paragraph, the Option or Stock Purchase Right
shall be considered assumed if, following the merger, the option or right
confers the right to purchase, for each Share of Optioned Stock subject to the
Option or Stock Purchase Right immediately prior to the merger, the
consideration (whether stock, cash, or other securities or property) received in
the merger by holders of Common Stock for each Share held on the effective date
of the transaction (and if holders were offered a choice of consideration, the
type of consideration chosen by the holders of a majority of the outstanding
Shares); provided, however, that if such consideration received in the merger
was not solely common stock of the successor corporation or its Parent, the
Administrator may, with the consent of the successor corporation, provide for

                                       -10-

<PAGE>

the consideration to be received upon the exercise of the Option or Stock
Purchase Right, for each Share of Optioned Stock subject to the Option or Stock
Purchase Right, to be solely common stock of the successor corporation or its
Parent equal in fair market value to the per share consideration received by
holders of Common Stock in the merger.

     13.  Time of Granting Options and Stock Purchase Rights. The date of grant
          --------------------------------------------------
of an Option or Stock Purchase Right shall, for all purposes, be the date on
which the Administrator makes the determination granting such Option or Stock
Purchase Right, or such other date as is determined by the Board. Notice of the
determination shall be given to each Employee or Consultant to whom an Option or
Stock Purchase Right is so granted within a reasonable time after the date of
such grant.

     14.  Amendment and Termination of the Plan.
          -------------------------------------

          (a)  Amendment and Termination. The Board may at any time amend,
               -------------------------
alter, suspend or discontinue the Plan, but no amendment, alteration, suspension
or discontinuation shall be made which would impair the rights of any Optionee
under any grant theretofore made, without his or her consent. In addition, to
the extent necessary and desirable to comply with Rule 16b-3 under the Exchange
Act or with Section 422 of the Code (or any other applicable law or regulation,
including the requirements of the NASD or an established stock exchange), the
Company shall obtain shareholder approval of any Plan amendment in such a manner
and to such a degree as required.

          (b)  Effect of Amendment or Termination. Any such amendment or
               ----------------------------------
termination of the Plan shall not affect Options or Stock Purchase Rights
already granted, and such Options and Stock Purchase Rights shall remain in full
force and effect as if this Plan had not been amended or terminated, unless
mutually agreed otherwise between the Optionee and the Board, which agreement
must be in writing and signed by the Optionee and the Company.

     15. Conditions Upon Issuance of Shares. Shares shall not be issued pursuant
         ----------------------------------
to the exercise of an Option or Stock Purchase Right unless the exercise of such
Option or Stock Purchase Right and the issuance and delivery of such Shares
pursuant thereto shall comply with all relevant provisions of law, including,
without limitation, the Securities Act of 1933, as amended, the Exchange Act,
the rules and regulations promulgated thereunder, and the requirements of any
stock exchange upon which the Shares may then be listed, and shall be further
subject to the approval of counsel for the Company with respect to such
compliance.

         As a condition to the exercise of an Option or Stock Purchase Right,
the Company may require the person exercising such Option or Stock Purchase
Right to represent and warrant at the time of any such exercise that the Shares
are being purchased only for investment and without any present intention to
sell or distribute such Shares if, in the opinion of counsel for the Company,
such a representation is required by any of the aforementioned relevant
provisions of law.

                                       -11-

<PAGE>

     16.  Reservation of Shares. The Company, during the term of this Plan, will
          ---------------------
at all times reserve and keep available such number of Shares as shall be
sufficient to satisfy the requirements of the Plan.

          The inability of the Company to obtain authority from any regulatory
body having jurisdiction, which authority is deemed by the Company's counsel to
be necessary to the lawful issuance and sale of any Shares hereunder, shall
relieve the Company of any liability in respect of the failure to issue or sell
such Shares as to which such requisite authority shall not have been obtained.

     17.  Agreements. Options and Stock Purchase Rights shall be evidenced by
          ----------
written agreements in such form as the Board shall approve from time to time.

     18.  Shareholder Approval. Continuance of the Plan shall be subject to
          --------------------
approval by the shareholders of the Company within twelve (12) months before or
after the date the Plan is adopted. Such shareholder approva1 shall be obtained
in the degree and manner required under applicable state and federal law and the
rules of any stock exchange upon which the Common Stock is listed.

     19.  Information to Optionees and Purchasers. The Company shall provide to
          ---------------------------------------
each Optionee and to each individual who acquired Shares pursuant to the Plan,
during the period such Optionee or purchaser has one or more Options or Stock
Purchase Rights outstanding, and, in the case of an individual who acquired
Shares pursuant to the Plan, during the period such individual owns such Shares,
copies of annual financial statements. The Company shall not be required to
provide such statements to key employees whose duties in connection with the
Company assure their access to equivalent information.

                                       -12-<PAGE>
                                                                    Exhibit 10.2

                               R2 TECHNOLOGY, INC.
                             a Delaware corporation

                   AMENDED AND RESTATED 1996 STOCK OPTION PLAN

<PAGE>

                               TABLE OF CONTENTS

<TABLE>
<CAPTION>
                                                                           Page
                                                                           ----
<S>                                                                        <C>
1.    Purposes of the Plan ..............................................    1
      --------------------
2.    Definitions .......................................................    1
      -----------
3.    Stock Subject to the Plan .........................................    4
      -------------------------
4.    Administration of the Plan ........................................    5
      --------------------------
5.    Eligibility .......................................................    7
      -----------
6.    Limitations .......................................................    7
      -----------
7.    Term of Plan ......................................................    7
      ------------
8.    Term of Option ....................................................    7
      --------------
9.    Option Exercise Price and Consideration ...........................    8
      ---------------------------------------
10.   Exercise of Option ................................................    9
      ------------------
11.   Non-Transferability of Options ....................................   11
      ------------------------------
12.   Stock Purchase Rights .............................................   12
      ---------------------
13.   Adjustments upon Changes in Capitalization, Merger or Asset Sale ..   12
      ----------------------------------------------------------------
14.   Time of Granting Options ..........................................   14
      ------------------------
15.   Amendment and Termination of the Plan .............................   14
      -------------------------------------
16.   Stockholder Approval ..............................................   15
      --------------------
17.   Inability to Obtain Authority .....................................   15
      -----------------------------
18.   Reservation of Shares .............................................   15
      ---------------------
19.   Information to Holders and Purchasers .............................   15
      -------------------------------------
20.   Repurchase Provisions .............................................   15
      ---------------------
21.   Investment Intent .................................................   16
      -----------------
22.   Governing Law .....................................................   16
      -------------
</TABLE>

                                       i

<PAGE>

                               R2 TECHNOLOGY, INC.
                             a Delaware corporation

                   AMENDED AND RESTATED 1996 STOCK OPTION PLAN

     1.  Purposes of the Plan. The purposes of this R2 Technology, Inc., Amended
         --------------------
and Restated 1996 Stock Option Plan are to attract and retain the best available
personnel for positions of substantial responsibility, to provide additional
incentive to Employees, Directors and Consultants and to promote the success of
the Company's business. Options granted under the Plan may be Incentive Stock
Options or Non-Qualified Stock Options, as determined by the Administrator at
the time of grant.

     2.  Definitions. As used herein, the following definitions shall apply:
         -----------

         (a)  "Acquisition" means (i) any consolidation or merger of the Company
               -----------
with or into any other corporation or other entity or person in which the
stockholders of the Company prior to such consolidation or merger own less than
fifty percent (50%) of the Company's voting power immediately after such
consolidation or merger, excluding any consolidation or merger effected
exclusively to change the domicile of the Company; or (ii) a sale of all or
substantially all of the assets of the Company.

         (b)  "Administrator" means the Board or the Committee responsible for
               -------------
conducting the general administration of the Plan, as applicable, in accordance
with Section 4 hereof.

         (c)  "Applicable Laws" means the requirements relating to the
               ---------------
administration of stock option plans under U.S. state corporate laws, U.S.
federal and state securities laws, the Code, any stock exchange or quotation
system on which the Common Stock is listed or quoted and the applicable laws of
any foreign country or jurisdiction where Options are granted under the Plan.

         (d)  "Board" means the Board of Directors of the Company.
               -----

         (e)  "Cause" means a Service Provider's (i) willful misconduct or
               -----
dereliction in the performance of his or her duties to the Company or its
successor, (ii) breach of any of the Company's or its successor's material
employment policies, (iii) dishonesty or misrepresentation involving the Company
or its successor, (iv) unauthorized use of trade secrets or confidential
information, (v) violation of any covenants regarding non-competition and/or
non-solicitation, or (vi) conviction of or plea of guilty or nolo contendere to
felony criminal conduct.

         (f)  "Code" means the Internal Revenue Code of 1986, as amended, or any
               ----
successor statute or statutes thereto. Reference to any particular Code section
shall include any successor section.

         (g)  "Committee" means a committee appointed by the Board in accordance
               ---------
with Section 4 hereof.

<PAGE>

         (h)  "Common Stock" means the Common Stock of the Company, par value
               ------------
$0.001 per share.

         (i)  "Company" means R2 Technology, Inc., a Delaware corporation.
               -------

         (j)  "Constructive Termination" means that any of the following actions
               ------------------------
are undertaken with respect to a Service Provider in connection with an
Acquisition (in the context of Section 13 hereof) without such Service
Provider's express written consent: (i) the assignment to such Service Provider
of any duties or responsibilities which results in any diminution or adverse
change of such Service Provider's position, status, circumstances of employment
or scope of responsibilities; (ii) a change in such Service Provider's job title
as in effect on the effective date of the Acquisition (iii) a reduction in the
number of individuals reporting directly to such Service Provider from the
number of individuals reporting directly as of the effective date of the
Acquisition or a change in the person(s) to whom such Service Provider reports
as of the effective date of the Acquisition, (iv) except as provided in clause
(v) below, a reduction by the Company or its successor in such Service
Provider's total compensation as in effect on the effective date of the
Acquisition; (v) the taking of any action by the Company or its successor that
would adversely affect such Service Provider's participation in, or reduce such
Service Provider's benefits under, the Company's or its successor's benefit
plans (including equity benefits) as of the effective date of the Acquisition,
except to the extent the benefits of all other executives of the Company or its
successor are similarly reduced; or (vi) a relocation of such Service Provider's
principal office from the location at which such Service Provider was performing
his or her duties as of the effective date of the Acquisition which would
increase the duration or distance of such Service Provider's commute as of the
effective date of the Acquisition.

         (k)  "Consultant" means any consultant or adviser if: (i) the
               ----------
consultant or adviser renders bona fide services to the Company or any Parent or
Subsidiary of the Company; (ii) the services rendered by the consultant or
adviser are not in connection with the offer or sale of securities in a
capital-raising transaction and do not directly or indirectly promote or
maintain a market for the Company's securities; and (iii) the consultant or
adviser is a natural person who has contracted directly with the Company or any
Parent or Subsidiary of the Company to render such services.

         (l)  "Director" means a member of the Board.
               --------

         (m)  "Employee" means any person, including an Officer or Director, who
               --------
is an employee (as defined in accordance with Section 3401(c) of the Code) of
the Company or any Parent or Subsidiary of the Company. A Service Provider shall
not cease to be an Employee in the case of (i) any leave of absence approved by
the Company or (ii) transfers between locations of the Company or between the
Company, its Parent, any Subsidiary, or any successor. For purposes of Incentive
Stock Options, no such leave may exceed ninety (90) days, unless reemployment
upon expiration of such leave is guaranteed by statute or contract. Neither
service as a Director nor payment of a director's fee by the Company shall be
sufficient, by itself, to constitute "employment" by the Company.

                                       2

<PAGE>

         (n)  "Exchange Act" means the Securities Exchange Act of 1934, as
               ------------
amended, or any successor statute or statutes thereto. Reference to any
particular Exchange Act section shall include any successor section.

         (o)  "Fair Market Value" means, as of any date, the value of a share of
               -----------------
Common Stock determined as follows:

              (i)   If the Common Stock is listed on any established stock
exchange or a national market system, including, without limitation, the Nasdaq
National Market or The Nasdaq SmallCap Market of The Nasdaq Stock Market, its
Fair Market Value shall be the closing sales price for a share of such stock (or
the closing bid, if no sales were reported) as quoted on such exchange or system
for the last market trading day prior to the time of determination, as reported
in The Wall Street Journal or such other source as the Administrator deems
reliable;

              (ii)  If the Common Stock is regularly quoted by a recognized
securities dealer but selling prices are not reported, its Fair Market Value
shall be the mean between the high bid and low asked prices for a share of the
Common Stock on the last market trading day prior to the day of determination;
or

              (iii) In the absence of an established market for the Common
Stock, the Fair Market Value thereof shall be determined in good faith by the
Administrator.

         (p)  "Holder" means a person who has been granted or awarded an Option
               ------
or who holds Shares acquired pursuant to the exercise of an Option.

         (q)  "Incentive Stock Option" means an Option intended to qualify as an
               ----------------------
incentive stock option within the meaning of Section 422 of the Code and which
is designated as an Incentive Stock Option by the Administrator.

         (r)  "Independent Director" means a Director who is not an Employee of
               --------------------
the Company.

         (s)  "Non-Qualified Stock Option" means an Option (or portion thereof)
               --------------------------
that is not designated as an Incentive Stock Option by the Administrator, or
which is designated as an Incentive Stock Option by the Administrator but fails
to qualify as an incentive stock option within the meaning of Section 422 of the
Code.

         (t)  "Officer" means a person who is an officer of the Company within
               -------
the meaning of Section 16 of the Exchange Act and the rules and regulations
promulgated thereunder.

         (u)  "Option" means a stock option granted pursuant to the Plan.
               ------

         (v)  "Option Agreement" means a written agreement between the Company
               ----------------
and a Holder evidencing the terms and conditions of an individual Option grant.
The Option Agreement is subject to the terms and conditions of the Plan.

                                       3

<PAGE>

         (w)  "Parent" means any corporation, whether now or hereafter existing
               ------
(other than the Company), in an unbroken chain of corporations ending with the
Company if each of the corporations other than the last corporation in the
unbroken chain owns stock possessing more than fifty percent of the total
combined voting power of all classes of stock in one of the other corporations
in such chain.

         (x)  "Plan" means the R2 Technology, Inc., Amended and Restated 1996
               ----
Stock Option Plan.

         (y)  "Public Trading Date" means the first date upon which Common Stock
               -------------------
of the Company is listed (or approved for listing) upon notice of issuance on
any securities exchange or designated (or approved for designation) upon notice
of issuance as a national market security on an inter-dealer quotation system.

         (z)  "Restricted Stock" means Shares acquired pursuant to the exercise
               ----------------
of an unvested Option in accordance with Section 10(h).

         (aa) "Rule 16b-3" means that certain Rule 16b-3 under the Exchange Act,
               ----------
as such Rule may be amended from time to time.

         (bb) "Section 16(b)" means Section 16(b) of the Exchange Act, as such
               -------------
Section may be amended from time to time.

         (cc) "Securities Act" means the Securities Act of 1933, as amended, or
               --------------
any successor statute or statutes thereto. Reference to any particular
Securities Act section shall include any successor section.

         (dd) "Service Provider" means an Employee, Director or Consultant.
               ----------------

         (ee) "Share" means a share of Common Stock, as adjusted in accordance
               -----
with Section 13 below.

         (ff) "Stock Purchase Right" means a right to purchase Common Stock
               --------------------
pursuant to a written offer made to a Service Provider by the Company containing
the terms, conditions and restrictions related to the offer, including the
number of Shares that such person shall be entitled to purchase, the price to be
paid, and the time within which such person must accept such offer.

         (gg) "Subsidiary" means any corporation, whether now or hereafter
               ----------
existing (other than the Company), in an unbroken chain of corporations
beginning with the Company if each of the corporations other than the last
corporation in the unbroken chain owns stock possessing more than fifty percent
of the total combined voting power of all classes of stock in one of the other
corporations in such chain.

     3.  Stock Subject to the Plan.
         -------------------------

                                       4

<PAGE>

         (a)  Subject to the provisions of Section 13 of the Plan, the shares of
stock subject to Options shall be Common Stock, initially shares of the
Company's Common Stock, par value $0.001 per share. Subject to the provisions of
Section 13 of the Plan relating to adjustments upon changes in capitalization,
the maximum aggregate number of Shares which may be issued upon exercise of such
Options is 10,000,000 Shares.

         (b)  Shares issued upon exercise of Options may be authorized but
unissued, or reacquired Common Stock. If an Option expires or becomes
unexercisable without having been exercised in full, the unpurchased Shares that
were subject thereto shall become available for future grant or sale under the
Plan (unless the Plan has terminated). Shares that are delivered by the Holder
or withheld by the Company upon the exercise of an Option under the Plan, in
payment of the exercise price thereof or tax withholding thereon, may again be
optioned, granted or awarded hereunder, subject to the limitations of this
Section 3. If Shares of Restricted Stock are repurchased by the Company at their
original purchase price, such Shares shall become available for future grant
under the Plan. Notwithstanding the provisions of this Section 3, no Shares may
again be optioned, granted or awarded if such action would cause an Incentive
Stock Option to fail to qualify as an Incentive Stock Option under Code Section
422.

     4.  Administration of the Plan.
         --------------------------

         (a)  Administrator. Unless and until the Board delegates administration
              -------------
to a Committee as set forth below, the Plan shall be administered by the Board.
The Board may delegate administration of the Plan to a Committee or Committees
of one or more members of the Board, and the term "Committee" shall apply to any
person or persons to whom such authority has been delegated. If administration
is delegated to a Committee, the Committee shall have, in connection with the
administration of the Plan, the powers theretofore possessed by the Board,
including the power to delegate to a subcommittee any of the administrative
powers the Committee is authorized to exercise (and references in this Plan to
the Board shall thereafter be to the Committee or subcommittee), subject,
however, to such resolutions, not inconsistent with the provisions of the Plan,
as may be adopted from time to time by the Board. Notwithstanding the foregoing,
however, from and after the Public Trading Date, a Committee of the Board shall
administer the Plan and the Committee shall consist solely of two or more
Independent Directors each of whom is both an "outside director," within the
meaning of Section 162(m) of the Code, and a "non-employee director" within the
meaning of Rule 16b-3. Within the scope of such authority, the Board or the
Committee may (i) delegate to a committee of one or more members of the Board
who are not Independent Directors the authority to grant awards under the Plan
to eligible persons who are either (1) not then "covered employees," within the
meaning of Section 162(m) of the Code and are not expected to be "covered
employees" at the time of recognition of income resulting from such award or (2)
not persons with respect to whom the Company wishes to comply with Section
162(m) of the Code and/or (ii) delegate to a committee of one or more members of
the Board who are not "non-employee directors," within the meaning of Rule
16b-3, the authority to grant awards under the Plan to eligible persons who are
not then subject to Section 16 of the Exchange Act. The Board may abolish the
Committee at any time and revest in the Board the administration of the Plan.
Appointment of Committee members shall be effective upon acceptance of
appointment. Committee members may resign at any time by delivering written
notice to the Board. Vacancies in the Committee may only be filled by the Board.

                                       5

<PAGE>

         (b)  Powers of the Administrator. Subject to the provisions of the Plan
              ---------------------------
and the specific duties delegated by the Board to such Committee, and subject to
the approval of any relevant authorities, the Administrator shall have the
authority in its sole discretion:

              (i)    to determine the Fair Market Value;

              (ii)   to select the Service Providers to whom Options may from
time to time be granted hereunder;

              (iii)  to determine the number of Shares to be covered by each
such award granted hereunder;

              (iv)   to approve forms of agreement for use under the Plan;

              (v)    to determine the terms and conditions of any Option granted
hereunder (such terms and conditions include, but are not limited to, the
exercise price, the time or times when Options may vest or be exercised (which
may be based on performance criteria), any vesting acceleration or waiver of
forfeiture restrictions, and any restriction or limitation regarding any Option
or the Common Stock relating thereto, based in each case on such factors as the
Administrator, in its sole discretion, shall determine);

              (vi)   to determine whether to offer to buyout a previously
granted Option as provided in subsection 10(i) and to determine the terms and
conditions of such offer and buyout (including whether payment is to be made in
cash or Shares);

              (vii)  to prescribe, amend and rescind rules and regulations
relating to the Plan, including rules and regulations relating to sub-plans
established for the purpose of qualifying for preferred tax treatment under
foreign tax laws;

              (viii) to allow Holders to satisfy withholding tax obligations by
electing to have the Company withhold from the Shares to be issued upon exercise
of an Option that number of Shares having a Fair Market Value equal to the
minimum amount required to be withheld based on the statutory withholding rates
for federal and state tax purposes that apply to supplemental taxable income.
The Fair Market Value of the Shares to be withheld shall be determined on the
date that the amount of tax to be withheld is to be determined. All elections by
Holders to have Shares withheld for this purpose shall be made in such form and
under such conditions as the Administrator may deem necessary or advisable;

              (ix)   to amend the Plan or any Option granted under the Plan as
provided in Section 15; and

              (x)    to construe and interpret the terms of the Plan and awards
granted pursuant to the Plan and to exercise such powers and perform such acts
as the Administrator deems necessary or desirable to promote the best interests
of the Company which are not in conflict with the provisions of the Plan.

                                       6

<PAGE>

         (c)  Effect of Administrator's Decision. All decisions, determinations
              ----------------------------------
and interpretations of the Administrator shall be final and binding on all
Holders.

         5.  Eligibility. Non-Qualified Stock Options may be granted to Service
             -----------
Providers. Incentive Stock Options may be granted only to Employees. If
otherwise eligible, an Employee or Consultant who has been granted an Option may
be granted additional Options.

         6.  Limitations.
             -----------

             (a)  Each Option shall be designated by the Administrator in the
Option Agreement as either an Incentive Stock Option or a Non-Qualified Stock
Option. However, notwithstanding such designations, to the extent that the
aggregate Fair Market Value of Shares subject to a Holder's Incentive Stock
Options and other incentive stock options granted by the Company, any Parent or
Subsidiary, which become exercisable for the first time during any calendar year
(under all plans of the Company or any Parent or Subsidiary) exceeds $100,000,
such excess Options or other options shall be treated as Non-Qualified Stock
Options.

             For purposes of this Section 6(a), Incentive Stock Options shall be
taken into account in the order in which they were granted, and the Fair Market
Value of the Shares shall be determined as of the time of grant.

             (b)  Neither the Plan nor any Option shall confer upon a Holder any
right with respect to continuing the Holder's employment or consulting
relationship with the Company, nor shall they interfere in any way with the
Holder's right or the Company's right to terminate such employment or consulting
relationship at any time, with or without cause.

             (c)  No Service Provider shall be granted, in any calendar year,
Options to purchase more than 150,000 Shares; provided, however, that the
                                              --------
foregoing limitation shall not apply prior to the Public Trading Date and,
following the Public Trading Date, the foregoing limitation shall not apply
until the earliest of: (i) the first material modification of the Plan; (ii) the
issuance of all of the shares of Common Stock reserved for issuance under the
Plan; (iii) the expiration of the Plan; (iv) the first meeting of stockholders
at which Directors of the Company are to be elected which occurs after the close
of the third calendar year following the calendar year in which occurred the
first registration of an equity security of the Company under Section 12 of the
Exchange Act; or (v) such other date required by Section 162(m) of the Code and
the rules and regulations promulgated thereunder. The foregoing limitation shall
be adjusted proportionately in connection with any change in the Company's
capitalization as described in Section 13. For purposes of this Section 6(c), if
an Option is canceled in the same calendar year it was granted (other than in
connection with a transaction described in Section 13), the canceled Option will
be counted against the limit set forth in this Section 6(c). For this purpose,
if the exercise price of an Option is reduced, the transaction shall be treated
as a cancellation of the Option and the grant of a new Option.

         7.  Term of Plan. The Plan shall become effective upon its initial
             ------------
adoption by the Board and shall continue in effect until it is terminated under
Section 15 of the Plan. No Options may be issued under the Plan after May 16,
2008.

                                       7

<PAGE>

         8.  Term of Option. The term of each Option shall be stated in the
             --------------
Option Agreement; provided, however, that the term shall be no more than ten
                  --------
(10) years from the date of grant thereof. In the case of an Incentive Stock
Option granted to a Holder who, at the time the Option is granted, owns (or is
treated as owning under Code Section 424) stock representing more than ten
percent (10%) of the voting power of all classes of stock of the Company or any
Parent or Subsidiary, the term of the Option shall be five (5) years from the
date of grant or such shorter term as may be provided in the Option Agreement.

         9.  Option Exercise Price and Consideration.
             ---------------------------------------

             (a)  The per share exercise price for the Shares to be issued upon
exercise of an Option shall be such price as is determined by the Administrator,
but shall be subject to the following:

                  (i)   In the case of an Incentive Stock Option

                        (A)  granted to an Employee who, at the time of grant of
such Option, owns (or is treated as owning under Code Section 424) stock
representing more than ten percent (10%) of the voting power of all classes of
stock of the Company or any Parent or Subsidiary, the per Share exercise price
shall be no less than one hundred ten percent (110%) of the Fair Market Value
per Share on the date of grant.

                        (B)  granted to any other Employee, the per Share
exercise price shall be no less than one hundred percent (100%) of the Fair
Market Value per Share on the date of grant.

                  (ii)  In the case of a Non-Qualified Stock Option

                        (A)  granted to a Service Provider who, at the time of
grant of such Option, owns stock representing more than ten percent (10%) of the
voting power of all classes of stock of the Company or any Parent or Subsidiary,
the exercise price shall be no less than one hundred ten percent (110%) of the
Fair Market Value per Share on the date of the grant.

                        (B)   granted to any other Service Provider, the per
Share exercise price shall be no less than eighty-five percent (85%) of the Fair
Market Value per Share on the date of grant.

                  (iii) Notwithstanding the foregoing, Options may be granted
with a per Share exercise price other than as required above pursuant to a
merger or other corporate transaction.

             (b)  The consideration to be paid for the Shares to be issued upon
exercise of an Option, including the method of payment, shall be determined by
the Administrator (and, in the case of an Incentive Stock Option, shall be
determined at the time of grant). Such consideration may consist of (1) cash,
(2) check, (3) with the consent of the Administrator, a full recourse promissory
note bearing interest (at no less than a market rate of interest) and payable
upon such terms as may be prescribed by the Administrator, (4) with the consent
of the

                                       8

<PAGE>

Administrator, other Shares which (x) in the case of Shares acquired from the
Company, have been owned by the Holder for more than six (6) months on the date
of surrender, and (y) have a Fair Market Value on the date of surrender equal to
the aggregate exercise price of the Shares as to which such Option shall be
exercised, (5) with the consent of the Administrator, surrendered Shares then
issuable upon exercise of the Option having a Fair Market Value on the date of
exercise equal to the aggregate exercise price of the Option or exercised
portion thereof, (6) property of any kind which constitutes good and valuable
consideration, (7) with the consent of the Administrator, delivery of a notice
that the Holder has placed a market sell order with a broker with respect to
Shares then issuable upon exercise of the Options and that the broker has been
directed to pay a sufficient portion of the net proceeds of the sale to the
Company in satisfaction of the Option exercise price, provided, that payment of
                                                      --------
such proceeds is then made to the Company upon settlement of such sale,
or (8) with the consent of the Administrator, any combination of the foregoing
methods of payment.

         10.  Exercise of Option.
              ------------------

              (a)  Vesting; Fractional Exercises. Options granted hereunder
                   -----------------------------
shall be vested and exercisable according to the terms hereof at such times and
under such conditions as determined by the Administrator and set forth in the
Option Agreement; provided, however, that, except with regard to Options granted
                  --------
to Officers, Directors or Consultants, in no event shall an Option granted
hereunder become vested and exercisable at a rate of less than twenty percent
(20%) per year over five (5) years from the date the Option is granted, subject
to reasonable conditions, such as continuing to be a Service Provider. An Option
may not be exercised for a fraction of a Share.

              (b)  Deliveries upon Exercise. All or a portion of an exercisable
                   ------------------------
Option shall be deemed exercised upon delivery of all of the following to the
Secretary of the Company or his or her office:

                   (i)   A written or electronic notice complying with the
applicable rules established by the Administrator stating that the Option, or a
portion thereof, is exercised. The notice shall be signed by the Holder or other
person then entitled to exercise the Option or such portion of the Option;

                   (ii)  Such representations and documents as the
Administrator, in its sole discretion, deems necessary or advisable to effect
compliance with Applicable Laws. The Administrator may, in its sole discretion,
also take whatever additional actions it deems appropriate to effect such
compliance, including, without limitation, placing legends on share certificates
and issuing stop transfer notices to agents and registrars;

                   (iii) Upon the exercise of all or a portion of an unvested
Option pursuant to Section 10(h), a Restricted Stock purchase agreement in a
form determined by the Administrator and signed by the Holder or other person
then entitled to exercise the Option or such portion of the Option; and

                                       9

<PAGE>

                   (iv)  In the event that the Option shall be exercised
pursuant to Section 10(f) by any person or persons other than the Holder,
appropriate proof of the right of such person or persons to exercise the Option.

              (c)  Conditions to Delivery of Share Certificates. The Company
                   --------------------------------------------
shall not be required to issue or deliver any certificate or certificates for
Shares purchased upon the exercise of any Option or portion thereof prior to
fulfillment of all of the following conditions:

                   (i)   The admission of such Shares to listing on all stock
exchanges on which such class of stock is then listed;

                   (ii)  The completion of any registration or other
qualification of such Shares under any state or federal law, or under the
rulings or regulations of the Securities and Exchange Commission or any other
governmental regulatory body which the Administrator shall, in its sole
discretion, deem necessary or advisable;

                   (iii) The obtaining of any approval or other clearance from
any state or federal governmental agency which the Administrator shall, in its
sole discretion, determine to be necessary or advisable;

                   (iv)  The lapse of such reasonable period of time following
the exercise of the Option as the Administrator may establish from time to time
for reasons of administrative convenience; and

                   (v)   The receipt by the Company of full payment for such
Shares, including payment of any applicable withholding tax, which in the sole
discretion of the Administrator may be in the form of consideration used by the
Holder to pay for such Shares under Section 9(b).

              (d)  Termination of Relationship as a Service Provider. If a
                   -------------------------------------------------
Holder ceases to be a Service Provider other than by reason of the Holder's
disability or death, such Holder may exercise his or her Option within such
period of time as is specified in the Option Agreement to the extent that the
Option is vested on the date of termination; provided, however, that prior to
                                             --------
the Public Trading Date, such period of time shall not be less than thirty (30)
days (but in no event later than the expiration of the term of the Option as set
forth in the Option Agreement). In the absence of a specified time in the Option
Agreement, the Option shall remain exercisable for three (3) months following
the Holder's termination. If, on the date of termination, the Holder is not
vested as to his or her entire Option, the Shares covered by the unvested
portion of the Option immediately cease to be issuable under the Option and
shall again become available for issuance under the Plan. If, after termination,
the Holder does not exercise his or her Option within the time period specified
herein, the Option shall terminate, and the Shares covered by such Option shall
again become available for issuance under the Plan.

              (e)  Disability of Holder. If a Holder ceases to be a Service
                   --------------------
Provider as a result of the Holder's disability, the Holder may exercise his or
her Option within such period of time as is specified in the Option Agreement to
the extent the Option is vested on the date of

                                       10

<PAGE>

termination; provided, however, that prior to the Public Trading Date, such
             --------  -------
period of time shall not be less than six (6) months (but in no event later than
the expiration of the term of such Option as set forth in the Option Agreement).
In the absence of a specified time in the Option Agreement, the Option shall
remain exercisable for twelve (12) months following the Holder's termination. If
such disability is not a "disability" as such term is defined in Section
22(e)(3) of the Code, in the case of an Incentive Stock Option such Incentive
Stock Option shall automatically cease to be treated as an Incentive Stock
Option and shall be treated for tax purposes as a Non-Qualified Stock Option
from and after the day which is three (3) months and one (1) day following such
termination. If, on the date of termination, the Holder is not vested as to his
or her entire Option, the Shares covered by the unvested portion of the Option
shall immediately cease to be issuable under the Option and shall again become
available for issuance under the Plan. If, after termination, the Holder does
not exercise his or her Option within the time specified herein, the Option
shall terminate, and the Shares covered by such Option shall again become
available for issuance under the Plan.

         (f) Death of Holder. If a Holder dies while a Service Provider, the
             ---------------
Option may be exercised within such period of time as is specified in the Option
Agreement provided, however, that prior to the Public Trading Date, such period
          --------
of time shall not be less than six (6) months (but in no event later than the
expiration of the term of such Option as set forth in the Notice of Grant), by
the Holder's estate or by a person who acquires the right to exercise the Option
by bequest or inheritance, but only to the extent that the Option is vested on
the date of death. In the absence of a specified time in the Option Agreement,
the Option shall remain exercisable for twelve (12) months following the
Holder's termination. If, at the time of death, the Holder is not vested as to
his or her entire Option, the Shares covered by the unvested portion of the
Option shall immediately cease to be issuable under the Option and shall again
become available for issuance under the Plan. The Option may be exercised by the
executor or administrator of the Holder's estate or, if none, by the person(s)
entitled to exercise the Option under the Holder's will or the laws of descent
or distribution. If the Option is not so exercised within the time specified
herein, the Option shall terminate, and the Shares covered by such Option shall
again become available for issuance under the Plan.

         (g) Regulatory Extension. A Holder's Option Agreement may provide that
             --------------------
if the exercise of the Option following the termination of the Holder's status
as a Service Provider (other than upon the Holder's death or Disability) would
be prohibited at any time solely because the issuance of shares would violate
the registration requirements under the Securities Act, then the Option shall
terminate on the earlier of (i) the expiration of the term of the Option set
forth in Section 8 or (ii) the expiration of a period of three (3) months after
the termination of the Holder's status as a Service Provider during which the
exercise of the Option would not be in violation of such registration
requirements.

         (h) Early Exercisability. The Administrator may provide in the terms of
             --------------------
a Holder's Option Agreement that the Holder may, at any time before the Holder's
status as a Service Provider terminates, exercise the Option in whole or in part
prior to the full vesting of the Option; provided, however, that subject to
                                         --------
Section 20 hereof, Shares acquired upon exercise of an Option which has not
fully vested may be subject to any forfeiture, transfer or other restrictions as
the Administrator may determine in its sole discretion.

                                       11

<PAGE>

         (i) Buyout Provisions. The Administrator may at any time offer to
             -----------------
buyout for a payment in cash or Shares, an Option previously granted, based on
such terms and conditions as the Administrator shall establish and communicate
to the Holder at the time that such offer is made.

    11.  Non-Transferability of Options. Options may not be sold, pledged,
         ------------------------------
assigned, hypothecated, transferred, or disposed of in any manner other than by
will or by the laws of descent or distribution and may be exercised, during the
lifetime of the Holder, only by the Holder.

    12.  Stock Purchase Rights. Stock Purchase Rights may not be issued under
         ---------------------
         the Plan.

    13.  Adjustments upon Changes in Capitalization, Merger or Asset Sale.
         ----------------------------------------------------------------

         (a)   In the event that the Administrator determines that any dividend
or other distribution (whether in the form of cash, Common Stock, other
securities, or other property), recapitalization, reclassification, stock split,
reverse stock split, reorganization, merger, consolidation, split-up, spin-off,
combination, repurchase, liquidation, dissolution, or sale, transfer, exchange
or other disposition of all or substantially all of the assets of the Company,
or exchange of Common Stock or other securities of the Company, issuance of
warrants or other rights to purchase Common Stock or other securities of the
Company, or other similar corporate transaction or event, in the Administrator's
sole discretion, affects the Common Stock such that an adjustment is determined
by the Administrator to be appropriate in order to prevent dilution or
enlargement of the benefits or potential benefits intended by the Company to be
made available under the Plan or with respect to any Option or Restricted Stock,
then the Administrator shall, in such manner as it may deem equitable, adjust
any or all of:

               (i)   the number and kind of shares of Common Stock (or other
securities or property) with respect to which Options may be granted or awarded
(including, but not limited to, adjustments of the limitations in Section 3 on
the maximum number and kind of shares which may be issued and adjustments of the
maximum number of Shares that may be purchased by any Holder in any calendar
year pursuant to Section 6(c));

               (ii)  the number and kind of shares of Common Stock (or other
securities or property) subject to outstanding Options or Restricted Stock; and

               (iii) the grant or exercise price with respect to any Option.

         (b)   In the event of any transaction or event described in Section
13(a), the Administrator, in its sole discretion, and on such terms and
conditions as it deems appropriate, either by the terms of the Option or
Restricted Stock or by action taken prior to the occurrence of such transaction
or event and either automatically or upon the Holder's request, is hereby
authorized to take any one or more of the following actions whenever the
Administrator determines that such action is appropriate in order to prevent
dilution or enlargement of the benefits or potential benefits intended by the
Company to be made available under the Plan or

                                       12

<PAGE>

with respect to any Option or Restricted Stock granted or issued under the Plan
or to facilitate such transaction or event:

               (i)   To provide for either the purchase of any such Option or
Restricted Stock for an amount of cash equal to the amount that could have been
obtained upon the exercise of such Option or realization of the Holder's rights
had such Option or Restricted Stock been currently exercisable or payable or
fully vested or the replacement of such Option or Restricted Stock with other
rights or property selected by the Administrator in its sole discretion;

               (ii)  To provide that such Option shall be exercisable as to all
shares covered thereby, notwithstanding anything to the contrary in the Plan or
the provisions of such Option;

               (iii) To provide that such Option or Restricted Stock be assumed
by the successor or survivor corporation, or a parent or subsidiary thereof, or
shall be substituted for by similar options, rights or awards covering the stock
of the successor or survivor corporation, or a parent or subsidiary thereof,
with appropriate adjustments as to the number and kind of shares and prices;

               (iv)  To make adjustments in the number and type of shares of
Common Stock (or other securities or property) subject to outstanding Options
and/or in the terms and conditions of (including the grant or exercise price),
and the criteria included in, outstanding Options or Restricted Stock, or
Options or Restricted Stock which may be granted in the future; and

               (v)   To provide that immediately upon the consummation of such
event, such Option shall not be exercisable and shall terminate; provided, that
                                                                 --------
for a specified period of time prior to such event, such Option shall be
exercisable as to all Shares covered thereby, and the restrictions imposed under
an Option Agreement or Restricted Stock purchase agreement upon some or all
Shares may be terminated and, in the case of Restricted Stock, some or all
shares of such Restricted Stock may cease to be subject to repurchase,
notwithstanding anything to the contrary in the Plan or the provisions of such
Option or Restricted Stock purchase agreement.

         (c) Subject to Section 3, the Administrator may, in its sole
discretion, include such further provisions and limitations in any Option,
Restricted Stock agreement or certificate, as it may deem equitable and in the
best interests of the Company.

         (d) If the Company undergoes an Acquisition, then any surviving
corporation or entity or acquiring corporation or entity, or affiliate of such
corporation or entity, may assume any Options or Restricted Stock outstanding
under the Plan or may substitute similar stock awards (including an award to
acquire the same consideration paid to the stockholders in the transaction
described in this subsection 13(d)) for those outstanding under the Plan. In the
event any surviving corporation or entity or acquiring corporation or entity in
an Acquisition, or affiliate of such corporation or entity, does not assume such
Options or Restricted Stock or does not substitute similar stock awards for
those outstanding under the Plan, then with respect to

                                       13

<PAGE>

(i) Options or Restricted Stock held by participants in the Plan whose status as
a Service Provider has not terminated prior to such event, the vesting of such
Options or Restricted Stock (and, if applicable, the time during which such
awards may be exercised) shall be accelerated and made fully exercisable and all
restrictions thereon shall lapse at least ten (10) days prior to the closing of
the Acquisition (and the Options terminated if not exercised prior to the
closing of such Acquisition), and (ii) any other Options outstanding under the
Plan, such Options shall be terminated if not exercised prior to the closing of
the Acquisition.

         (e) If the Company undergoes an Acquisition and if within eighteen (18)
months after the closing date of such Acquisition a Holder ceases to be a
Service Provider (to the Company or its successor) by reason of (i) involuntary
termination (not including the Service Provider's disability or death) without
Cause or (ii) voluntary termination by the Service Provider due to a
Constructive Termination, then the vesting of all Options or Restricted Stock
held by said Holder (and, if applicable, the time during which such awards may
be exercised) shall be accelerated and made fully exercisable and all
restrictions thereon shall lapse, as set forth hereinafter. One hundred percent
(100%) of the unvested Shares covered by such Options shall vest and become
fully exercisable (or reacquisition or repurchase rights held by the Company or
its successor shall lapse with respect to all of the Shares still subject to
such rights, as appropriate) as of the date of such termination.

         (f) Notwithstanding the foregoing paragraphs, in the event that the
Company becomes a party to a transaction that is intended to qualify for
"pooling of interests" accounting treatment and, but for one or more of the
provisions of this Plan or any Option Agreement or any Restricted Stock purchase
agreement would so qualify, then this Plan and any such agreement shall be
interpreted so as to preserve such accounting treatment, and to the extent that
any provision of the Plan or any such agreement would disqualify the transaction
from pooling of interests accounting treatment (including, if applicable, an
entire Option Agreement or Restricted Stock purchase agreement), then such
provision shall be null and void. All determinations to be made in connection
with the preceding sentence shall be made by the independent accounting firm
whose opinion with respect to "pooling of interests" treatment is required as a
condition to the Company's consummation of such transaction.

         (g) The existence of the Plan, any Option Agreement or Restricted Stock
purchase agreement and the Options granted hereunder shall not affect or
restrict in any way the right or power of the Company or the stockholders of the
Company to make or authorize any adjustment, recapitalization, reorganization or
other change in the Company's capital structure or its business, any merger or
consolidation of the Company, any issue of stock or of options, warrants or
rights to purchase stock or of bonds, debentures, preferred or prior preference
stocks whose rights are superior to or affect the Common Stock or the rights
thereof or which are convertible into or exchangeable for Common Stock, or the
dissolution or liquidation of the Company, or any sale or transfer of all or any
part of its assets or business, or any other corporate act or proceeding,
whether of a similar character or otherwise.

     14. Time of Granting Options. The date of grant of an Option shall, for all
         ------------------------
purposes, be the date on which the Administrator makes the determination
granting such Option, or such other date as is determined by the Administrator.
Notice of the determination shall be given to

                                       14

<PAGE>

each Employee or Consultant to whom an Option is so granted within a reasonable
time after the date of such grant.

     15. Amendment and Termination of the Plan.
         -------------------------------------

         (a) Amendment and Termination. The Board may at any time wholly or
             -------------------------
partially amend, alter, suspend or terminate the Plan. However, without approval
of the Company's stockholders given within twelve (12) months before or after
the action by the Board, no action of the Board may, except as provided in
Section 13, increase the limits imposed in Section 3 on the maximum number of
Shares which may be issued under the Plan or extend the term of the Plan under
Section 7.

         (b) Stockholder Approval. The Board shall obtain stockholder approval
             --------------------
of any Plan amendment to the extent necessary and desirable to comply with
Applicable Laws.

         (c) Effect of Amendment or Termination. No amendment, alteration,
             ----------------------------------
suspension or termination of the Plan shall impair the rights of any Holder,
unless mutually agreed otherwise between the Holder and the Administrator, which
agreement must be in writing and signed by the Holder and the Company.
Termination of the Plan shall not affect the Administrator's ability to exercise
the powers granted to it hereunder with respect to Options or Restricted Stock
granted or awarded under the Plan prior to the date of such termination.

     16. Stockholder Approval. The Plan will be submitted for the approval of
         --------------------
the Company's stockholders within twelve (12) months after the date of the
Board's initial adoption of the Plan. Options or Restricted Stock may be granted
or awarded prior to such stockholder approval, provided that such Options and
Restricted Stock shall not be exercisable, shall not vest and the restrictions
thereon shall not lapse prior to the time when the Plan is approved by the
stockholders, and provided further that if such approval has not been obtained
at the end of said twelve-month period, all Options and Restricted Stock
previously granted or awarded under the Plan shall thereupon be canceled and
become null and void.

     17. Inability to Obtain Authority. The inability of the Company to obtain
         -----------------------------
authority from any regulatory body having jurisdiction, which authority is
deemed by the Company's counsel to be necessary to the lawful issuance and sale
of any Shares hereunder, shall relieve the Company of any liability in respect
of the failure to issue or sell such Shares as to which such requisite authority
shall not have been obtained.

     18. Reservation of Shares. The Company, during the term of this Plan, shall
         ---------------------
at all times reserve and keep available such number of Shares as shall be
sufficient to satisfy the requirements of the Plan.

     19. Information to Holders and Purchasers. Prior to the Public Trading Date
         -------------------------------------
and to the extent required by Section 260.140.46 of Title 10 of the California
Code of Regulations, the Company shall provide to each Holder and to each
individual who acquires Shares pursuant to the Plan, not less frequently than
annually during the period such Holder or purchaser has one or more Options
outstanding, and, in the case of an individual who acquires Shares pursuant to
the Plan,

                                       15

<PAGE>

during the period such individual owns such Shares, copies of annual financial
statements. Notwithstanding the preceding sentence, the Company shall not be
required to provide such statements to key employees whose duties in connection
with the Company assure their access to equivalent information.

     20. Repurchase Provisions. The Administrator in its sole discretion may
         ---------------------
provide that the Company may repurchase Shares acquired upon exercise of an
Option upon the occurrence of certain specified events, including, without
limitation, a Holder's termination as a Service Provider, divorce, bankruptcy or
insolvency; provided, however, that any such repurchase right shall be set forth
            --------
in the applicable Option Agreement or Restricted Stock purchase agreement or in
another agreement referred to in such agreement and, provided further, that to
                                                     --------
the extent required by Section 260.140.41 and Section 260.140.42 of Title 10 of
the California Code of Regulations, any such repurchase right set forth in an
Option granted prior to the Public Trading Date to a person who is not an
Officer, Director or Consultant shall be upon the following terms: (i) if the
repurchase option gives the Company the right to repurchase the shares upon
termination as a Service Provider at not less than the Fair Market Value of the
shares to be purchased on the date of termination of status as a Service
Provider, then (A) the right to repurchase shall be exercised for cash or
cancellation of purchase money indebtedness for the shares within ninety (90)
days of termination of status as a Service Provider (or in the case of shares
issued upon exercise of Options after such date of termination, within ninety
(90) days after the date of the exercise) or such longer period as may be agreed
to by the Administrator and the Plan participant and (B) the right terminates
when the shares become publicly traded; and (ii) if the repurchase option gives
the Company the right to repurchase the Shares upon termination as a Service
Provider at the original purchase price for such Shares, then (A) the right to
repurchase at the original purchase price shall lapse at the rate of at least
twenty percent (20%) of the shares per year over five (5) years from the date
the Option is granted (without respect to the date the Option was exercised or
became exercisable) and (B) the right to repurchase shall be exercised for cash
or cancellation of purchase money indebtedness for the shares within ninety (90)
days of termination of status as a Service Provider (or, in the case of shares
issued upon exercise of Options, after such date of termination, within ninety
(90) days after the date of the exercise) or such longer period as may be agreed
to by the Company and the Plan participant.

     21. Investment Intent. The Company may require a Plan participant, as a
         -----------------
condition of exercising or acquiring stock under any Option, (i) to give written
assurances satisfactory to the Company as to the participant's knowledge and
experience in financial and business matters and/or to employ a purchaser
representative reasonably satisfactory to the Company who is knowledgeable and
experienced in financial and business matters and that he or she is capable of
evaluating, alone or together with the purchaser representative, the merits and
risks of exercising the Option; and (ii) to give written assurances satisfactory
to the Company stating that the participant is acquiring the stock subject to
the Option for the participant's own account and not with any present intention
of selling or otherwise distributing the stock. The foregoing requirements, and
any assurances given pursuant to such requirements, shall be inoperative if (A)
the issuance of the shares upon the exercise or acquisition of stock under the
applicable Option has been registered under a then currently effective
registration statement under the Securities Act or (B) as to any particular
requirement, a determination is made by counsel for the Company that such
requirement need not be met in the circumstances under the then applicable
securities

                                       16

<PAGE>

laws. The Company may, upon advice of counsel to the Company, place legends on
stock certificates issued under the Plan as such counsel deems necessary or
appropriate in order to comply with applicable securities laws, including, but
not limited to, legends restricting the transfer of the stock.

     22. Governing Law. The validity and enforceability of this Plan shall be
         -------------
governed by and construed in accordance with the laws of the State of Delaware
without regard to otherwise governing principles of conflicts of law.

                                  * * * * * * *

     I hereby certify that the Plan was duly adopted by the Board of Directors
of R2 Technology, Inc., on May __, 2001.

     Executed at Los Altos, California, on this ____ day of May, 2001.
                 ---------

                                   /s/ Michael S. Klein
                                   -------------------------------------------
                                   Name: Michael S. Klein
                                   Title:  President and Chief Executive Officer

                                  * * * * * * *

     I hereby certify that the foregoing Plan was approved by the stockholders
of R2 Technology, Inc., on May __, 2001.

     Executed at Menlo Park, California on this ____ day of May, 2001.
                 ----------

                                   /s/ Alan C. Mendelson
                                   -------------------------------------------
                                   Name: Alan C. Mendelson
                                   Title:  Secretary

                                       17

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