What is PET Scan ?
PET scan or Positron Emission Tomography is a diagnostic imaging technique used to detect a disease with the use of small amounts of biologically active compounds. A tracer is introduced into the body and its actions visualized. It is used to diagnose diseases of the heart, lung, brain, gastrointestinal tract and more. It is based on the principle that the action of the tracer material depends on the metabolic activity of the tissues. It gives a clear view of the biological, chemical and metabolic changes in a tissue. It can also provide input on the progress of a treatment. It can detect abnormalities even before an anatomical change occurs.