Used in nuclear medicine as a radiolabeled compound for diagnostic imaging of the heart. When labeled with iodine-123 or iodine-131, it serves as a myocardial perfusion imaging agent to assess blood flow to the cardiac muscle. It helps detect areas of reduced perfusion, particularly in patients with suspected coronary artery disease. The compound accumulates in viable myocardial tissue in proportion to blood flow, allowing clinicians to evaluate heart function and identify ischemic regions during stress and rest imaging protocols. Its uptake and retention characteristics make it suitable for single-photon emission computed tomography (SPECT) scans.