Nuclear myocardial perfusion imaging is a diagnostic imaging method that has the advantages of being simple, non-invasive, safe, and highly accurate. Myocardial perfusion imaging allows the observation of myocardial perfusion and the functional status of myocardial cells, which means that the presence of ischemia in the myocardium can be seen directly. Understanding myocardial ischemia not only helps patients to accurately diagnose coronary artery disease, but also, and more importantly, helps patients with coronary artery disease to identify the “offender vessel”. This is because by identifying the site of myocardial ischemia, the diseased coronary artery is identified. Patients with symptoms such as precordial discomfort, pain, and breath-holding may be suffering from myocardial ischemia due to coronary artery disease or other diseases. Nuclear myocardial perfusion imaging can help patients with these symptoms to accurately diagnose their presence or absence of coronary artery disease with an accuracy rate of greater than 90% or even more than 95%, and it is a non-invasive test that allows them to receive timely treatment.