Myocardial Infusion Imaging
A widely used diagnostic procedure for heart health is the imaging of the blood infusion to the heart using a low dose of a radioactive tracer in the blood. A large radiation detector rotates about the chest of the patient, detecting gamma radiation from the tracer element which has been injected into the patient's vein. The image shows the perfusion of the blood into the heart muscle.
The large detector uses an ionization detection in a manner similar to a Geiger counter and collects a series of exposures as it sequences around the body trunk. A collection of images is illustrated below, taken before and after exercise on a treadmill for comparison of the infusion of the blood under those two conditions.