WATERTOWN, Mass.--(BUSINESS WIRE)--Acusphere, Inc. (NASDAQ: ACUS) today announced that it exceeded the criteria for success for two of the primary endpoints, accuracy and sensitivity, in RAMP-2, its second Phase 3 clinical trial of Imagify™, (perflubutane polymer microspheres) injectable suspension. All three of the ultrasound blinded readers had superior sensitivity and non-inferior accuracy to nuclear stress, the most frequently used imaging procedure for the assessment of coronary artery disease. Although RAMP-2 did not achieve the specificity endpoint, the Company had previously reported superior specificity for Imagify in its first Phase 3 trial, RAMP-1. High accuracy and sensitivity were the top priorities in RAMP-2. The Company believes that these results will support a strong NDA submission in Q4 2007.