Nuclear medicine, like other forms of imaging helps to assist physicians in detecting and diagnosing diseases. Nuclear medicine
works by giving patients small doses of radioactive material,
radiopharmaceutical or a tracer, that localizes in specific organ
systems. It collects in the organ and gives off gamma rays, which is
detected by the gamma camera and then produces images and measurements
by a computer system.
Positron emission tomography (PET), also called PET or a PET scan,
is a diagnostic examination that involves the development of biologic
images based on the detection of subatomic particles. These particles
are emitted from a radioactive substance given to the patient.