CHICAGO and LEXINGTON, Mass.--(BUSINESS WIRE)--EPIX Pharmaceuticals, Inc. (NASDAQ: EPIX) announced today the results from a Phase 2a clinical trial of EP-2104R, a novel fibrin-binding thrombus (clot) imaging agent, as presented during an oral presentation at the Radiological Society of North America (RSNA) Annual Meeting in Chicago, Illinois. The results of the Phase 2a trial found that EP-2104R was able to detect blood clots not previously seen on magnetic resonance imaging (MRI) and enhanced the images of clots previously seen on MRI. Blood clots are a major underlying cause of several diseases including deep vein thrombosis, pulmonary embolism, heart attack and stroke, and identifying a minimally invasive method for detecting clots would address a substantial medical need.