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'Acusphere (NASDAQ:ACUS) was a specialty pharmaceutical company that develops new drugs and improved formulations of existing drugs using its proprietary microparticle technology. Acusphere's three initial product candidates are designed to address large unmet clinical needs within cardiology, oncology and asthma. These product candidates were created using proprietary technology that enables Acusphere to control the porosity and size of nanoparticles and microparticles in a versatile manner that allows particles to be customized to address the delivery needs of a variety of drugs. Acusphere's lead product candidate, AI-700 (new trade name Imagify™), is a cardiovascular drug in Phase 3 clinical development. AI-700 is designed to enable ultrasound to compete more effectively with nuclear stress testing, the leading procedure for detecting coronary heart disease. An estimated 9.5 million procedures are done each year in the U.S. to detect coronary heart disease, the leading cause of death in the United States.'

In 2008 the FDA panel rejected the regulatory application for AI-700 (Imagify™) because of safety concerns.