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Acusphere Announces Publication on Imagify in the Journal Future Drugs

WATERTOWN, Mass.--(BUSINESS WIRE)--May 23, 2007 - Acusphere, Inc. (NASDAQ: ACUS) today announced that the journal Future Drugs recently published an overview on Imagify(TM) (perflubutane polymer microspheres) injectable suspension. This publication is authored by Dr. Roxy Senior, Consultant Cardiologist and Director of Cardiac Research, Department of Cardiovascular Medicine and Institute of Postgraduate Medical Education and Research at Northwick Park Hospital in the U.K. Dr. Senior is also a Hon Professor, Middlesex University, London, U.K. and Imagify clinical investigator. In the publication, Dr. Senior describes Imagify, its clinical development and his views on how the investigational drug is positioned to influence the evolving discipline of myocardial contrast echocardiography for the assessment of myocardial perfusion (blood flow in the heart muscle). The article looks at Imagify clinical trial results through its Phase 3 pilot study.

The paper appears in the May 2007 issue, Volume 5, Number 3, Pages 413-421 of Future Drugs, and is available both through Future Drugs at and on Acusphere's corporate website at

About Acusphere, Inc.

Acusphere (NASDAQ: ACUS) is a specialty pharmaceutical company that develops new drugs and improved formulations of existing drugs using its proprietary microsphere technology. We are focused on developing proprietary drugs that can offer significant benefits such as improved safety and efficacy, increased patient compliance, greater ease of use, expanded indications or reduced cost. Our lead product candidate, Imagify(TM) (perflubutane polymer microspheres) injectable suspension, is a cardiovascular drug for the detection of coronary artery disease, the leading cause of death in the United States. In May 2007 we announced the results of our Phase 3 clinical program for Imagify. We are currently working towards submitting an NDA (New Drug Application) for Imagify. Imagify is designed to enable ultrasound to compete more effectively with nuclear stress testing, the leading procedure for detecting coronary artery disease. It is estimated that over 10 million procedures are done each year in the U.S. to detect coronary artery disease, the leading cause of death in the United States. The Company estimates that the potential annual U.S. market opportunity for Imagify exceeds $2 billion. Imagify and the Company's other product candidates were created using proprietary technology that enables Acusphere to control the porosity and size of nanoparticles and microspheres in a versatile manner that allows them to be customized to address the delivery needs of a variety of drugs. For more information about Acusphere visit the Company's web site at "Acusphere" and "Imagify" are trademarks of Acusphere, Inc.

Forward-looking Statements

The above press release contains forward-looking statements which are made pursuant to the safe harbor provisions of Section 21E of the Securities Exchange Act of 1934, including statements regarding the efficacy and safety of Imagify. There can be no assurance that the FDA will accept the Company's NDA for Imagify or that Imagify will be approved for the indication the Company is seeking, or at all. The Company's actual results may differ materially from those anticipated in these forward-looking statements based upon a number of factors, including anticipated operating losses and existing capital obligations, uncertainties associated with research, development, testing and related regulatory approvals, including uncertainties regarding regulatory evaluation of the Company's statistical analysis plan and clinical trial results and uncertainties regarding the potential affects of not achieving clinical endpoints, limited time to date for the Company to review the details of the clinical trial results, future capital needs and uncertainty of additional financing, uncertainties regarding the cost, timing and ultimate success of the qualification of the Company's commercial manufacturing facility in accordance with applicable regulatory requirements, complex manufacturing, high quality requirements, lack of commercial manufacturing experience, dependence on third-party manufacturers, suppliers and collaborators, uncertainties associated with intellectual property, competition, loss of key personnel, uncertainties associated with market acceptance and adequacy of reimbursement, technological change and government regulation, and other risks and challenges detailed in the Company's filings with the U.S. Securities and Exchange Commission, including the Company's Quarterly Report on Form 10-Q for the quarter ended March 31, 2007. Readers are cautioned not to place undue reliance on any forward-looking statements, which speak only as of the date of this press release. The Company undertakes no obligation to publicly release the results of any revisions to these forward-looking statements that may be made to reflect events or circumstances that occur after the date of this press release or to reflect the occurrence of unanticipated events.


Acusphere, Inc.
John F. Thero, 617-648-8800
Sr. Vice President and CFO
Stephen Schultz, 617-648-8800
Director, Corporate Communications
Investors: 617-925-3444
Media: 617-648-8800

Posted: May 2007