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Exhibit 99.2

CERTIFICATION OF CHIEF EXECUTIVE OFFICER AND PRINCIPAL FINANCIAL OFFICER PURSUANT TO §906 OF THE SARBANES-OXLEY ACT OF 2002

In accordance with 18 U.S.C. 1350, as adopted pursuant to §906 of the Sarbanes-Oxley Act of 2002, the undersigned, in his capacity as the Chief Executive Officer and Principal Financial Officer of 4-D Neuroimaging (the "Company") hereby certifies, to the best of his knowledge on the date hereof, that the annual report on Form 10-K/A for the fiscal year ended September 30, 2002 (the "Form 10-K/A"), filed concurrently herewith by the Company, fully complies with the requirements of Section 15(d) of the Securities Exchange Act of 1934, as amended, and that the information contained in the Form 10-K/A fairly presents, in all material respects, the net assets available for benefits of the Company's 1992 Employee Stock Purchase Plan as of such fiscal year.

/s/ D. SCOTT BUCHANAN

D. Scott Buchanan
Chief Executive Officer and Principal Financial Officer
Dated: January 17, 2003

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CERTIFICATION OF CHIEF EXECUTIVE OFFICER AND PRINCIPAL FINANCIAL OFFICER PURSUANT TO §906 OF THE SARBANES-OXLEY ACT OF 2002

4-D NEUROIMAGING 10-K/A