Positron Corporation is an American nuclear medicine healthcare company specializing in cardiac Positron Emission Tomography imaging. Positron is headquartered in Niagara Falls, New York in addition to its clinical and technical cardiovascular PET training facility. The company's products and services enable healthcare providers to diagnose cardiac disease and improve patient outcomes. Positron Corporation is a public company and traded on the Financial Industry Regulatory Authority, Inc.'s OTC Bulletin Board under the ticker symbol POSC. Wikipedia