Exhibit 10.22

                            UNSECURED PROMISSORY NOTE


On this 17th day of July 2006, Intraop Medical Corporation, a Nevada corporation
(the "Company"), does hereby agree to pay Donald A. Goer ("Lender") at his
offices at 570 Del Rey Avenue, Sunnyvale, CA or such other place as the holder
hereof shall reasonably designate, the sum of Fifty Thousand Dollars ($50,000)
along with accrued interest at the rate of 9% per annum as provided herein, in
consideration for the Lender's non-recourse loan made to the Company on the
above date and for the above amount.

1.   Principal Payments. Principal shall be payable to Lender as soon as
     possible from the Company's operating capital when conditions permit.
     Interest shall be paid upon repayment of this note.

2.   General Provisions.

     2.1   Non-Waiver. The undersigned further expressly agrees that this Note,
     or any payment hereunder, may be extended from time to time by Lender and
     acceptance by the Company of performance which does not strictly comply
     with the terms of this Note shall not be deemed to be a waiver of Lender's
     rights.

     2.2   Powers and Rights Not Waived; Remedies Cumulative. No delay or
     failure on the part of Lender in the exercise of any power or right shall
     operate as a waiver thereof; nor shall any single or partial exercise of
     the same preclude any other or further exercise thereof, or the exercise of
     any other power or right, and the rights and remedies of Lender are
     cumulative to, and are not exclusive of, any rights or remedies Lender
     would otherwise have.

     2.3   Costs of Collection. In the event it becomes necessary for either
     party to retain legal counsel for the enforcement of this Note or any of
     its terms, if successful in such enforcement by legal proceedings or
     otherwise, the enforcing party shall be reimbursed by the other party for
     reasonably incurred attorneys' fees and other costs and expenses of
     collection.

     2.4   Replacement of Note. On receipt of evidence reasonably satisfactory
     to the Company of the loss, theft, destruction or mutilation of this Note
     and delivery of an indemnity agreement reasonably satisfactory in form to
     the Company, or in the case of mutilation, on surrender and cancellation of
     this Note, the Company at its expense will execute and deliver, in lieu of
     this Note, a new promissory note of like tenor.

     2.5   Binding on Successors. The terms of this Note shall apply to, inure
     to the benefit of, and bind all parties hereto and their successors and
     assigns. As used herein the term "the undersigned" shall include the
     undersigned and any other person or entity who may subsequently become
     liable for the payment hereof. The term "Lender" shall include Lender as
     well as any other person or entity to whom this Note or any interest in
     this Note is conveyed or transferred.

     2.6   Governing Law. This Note shall be governed by and construed and
     enforced in accordance with the laws of the State of California, as such
     laws are applied to contracts entered into by residents of such state and
     performed in such state.


<PAGE>

     2.7   Modification. This Note and any of its terms only may be changed,
     waived or terminated by a written instrument signed by the party against
     which enforcement of that change, waiver or termination is sought.


COMPANY:
Intraop Medical Corporation.


/s/ Donald A. Goer
------------------
Donald A. Goer
President & CEO
Intraop Medical Corporation


/s/ Howard Solovei
------------------
Howard Solovei
CFO
Intraop Medical Corporation


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