The studies on nuclear cardiology are always performed using the conventional gamma camera with a sodium iodide detector and single-photon emission computed tomography (SPECT). A nuclear cardiogram uses the non-invasive technique to evaluate the pumping action of the heart and also to know the location and range of the heart attack, and assess the myocardial blood flow. Among the techniques, the myocardial perfusion imaging technique is widely used. Nuclear cardiology studies are ceaseless to expand an important role in the new millennium, in the non-invasive diagnosis of coronary artery disease, the assessment of the pumping function of the heart, and in the prediction of outcomes in patients with heart disease