Single photon emission computed tomography imaging method

A SPECT diagnostic method of performing myocardial perfusion imaging on a patient, the method comprising the steps of:

• (A) administering a stressing agent to the patient to place the patient's heart under stress;
• then
• (B) administering a stress radiotracer while the heart of the patient is under stress;
• (C) when the stress radiotracer is fixed in the heart, immediately scanning the heart to obtain a stress perfusion image and stress heart pumping ability information;
• (D) administering a rest radiotracer to the patient once the patient is at rest, the rest radiotracer and stress radiotracer comprising the same radiopharmaceutical, with the rest radiotracer being administered at a higher dose than the stress radiotracer;
• (E) when the rest radiotracer is fixed in a heart of the patient, scanning the heart to obtain rest heart pumping ability information and a rest perfusion image;
• (F) subtracting the stress perfusion image from the rest perfusion image to obtain a refined rest perfusion image.