Acusphere, Inc. is a specialty pharmaceutical company that develops drugs and formulations of existing drugs using its porous microparticle technology. This technology enables the Company to control the size and porosity of particles, including nanoparticles and microparticles, so that the particles can be customized to address the delivery needs of a variety of drugs. These product candidates include Imagify (perflubutane polymer microspheres for delivery in an injectable suspension, formerly known as AI-700), a cardiovascular drug for the detection of coronary artery disease; Hydrophobic Drug Delivery System (HDDS), which converts drugs that do not dissolve well in water into microparticles or nanoparticles of the drugs embedded in small microparticles; and Pulmonary Drug Delivery System (PDDS), which facilitates sustained release of asthma drugs by c