Exhibit 10.27

                            UNSECURED PROMISSORY NOTE

On this 15th day of March, 2007, Intraop Medical Corporation, a Nevada
corporation (the "Company"), does hereby agree to pay the Donald A. Goer and
Henci L. Goer 1989 Family Trust ("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 10% per annum as provided herein, in consideration for
Lender's unsecured 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. 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.

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         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





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