Summary of IMARX THERAPEUTICS INC

ITEM 4.01 CHANGES IN REGISTRANT'S CERTIFYING ACCOUNTANT

(a) Resignation of independent registered public accounting firm

In connection with the reorganization of McKennon, Wilson & Morgan LLP (the "Former Auditors"), certain of its audit partners resigned and joined a new accounting firm called DBBMcKennon. As a result, the Former Auditors resigned as the independent auditors of ImaRx Therapeutics, Inc. (the "Company") effective May 5, 2009. The Former Auditors had been the Company's auditor since December 19, 2008.

The Audit Committee of the Company's Board of Directors approved the resignation of the Former Auditors.

The Former Auditors' audit report on the Company's financial statements for each of the past two fiscal years did not contain an adverse opinion or disclaimer of opinion, and was not qualified or modified as to uncertainty, audit scope or accounting principles, except that the Former Auditors' report on the Company's financial statements for each of the past two fiscal years included an explanatory paragraph describing the uncertainty as to the Company's ability to continue as a going concern.

During the fiscal years ended December 31, 2008 and 2007 and through May 5, 2009, (a) there were no disagreements between the Company and the Former Auditors on any matter of accounting principles or practices, financial statement disclosure, or auditing scope or procedure, which disagreements, if not resolved to the satisfaction of the Former Auditors, would have caused the Former Auditors to make reference to the subject matter of the disagreement in connection with its reports on the financial statements for such years; and
(b) no reportable events as set forth in Item 304(a)(1)(v) of Regulation S-K have occurred.

The Company provided the Former Auditors with a copy of the disclosures it is making in response to Item 304(a) of Regulation S-K in this Current Report on Form 8-K prior to its filing with the Securities and Exchange Commission (the "SEC") and requested that the Former Auditors furnish it with a letter addressed to the SEC stating whether the Former Auditors agree with the above statements, and if not, stating the respects in which it does not agree. A copy of such letter, dated May 5, 2009, is filed as Exhibit 16.1 hereto.

(b) Engagement of new independent registered public accounting firm.

Effective May 5, 2009, the Audit Committee of the Company's Board of Directors appointed DBBMcKennon (the "New Auditors") as the Company's new independent auditors.

During the fiscal years ended December 31, 2008 and 2007 and through May 5, 2009, neither the Company nor anyone acting on its behalf consulted with the New Auditors regarding any of the matters or events set forth in Item 304(a)(2)(i) and (ii) of Regulation S-K.