A SPECT diagnostic method of performing myocardial perfusion imaging on a patient by administering a rest radiotracer to the patient while the patient is at rest then when the rest radiotracer is fixed in a heart of the patient, scanning the heart to obtain rest heart pumping ability information scanning the heart of the patient to obtain a rest perfusion image administering a stressing agent to the patient to place the patients heart under stress scanning the heart of the patient to obtain stress heart pumping ability information then administering a stress radiotracer while the heart of the patient is under stress then when the stress radiotracer is fixed in the heart, scanning the heart to obtain a stress perfusion image.