WHAT IS PET SCAN?

Positron Emission Tomography, also called PET imaging or a PET scan, is a diagnostic examination that involves the acquisition of physiologic images based on the detection of positrons through non-invasive molecular imaging technique. Positrons are tiny particles emitted from a radioactive substance administered to the patient. The subsequent views of the human body developed by this technique are used to evaluate a variety of diseases.  The usefulness of PET extends into a variety of medical specialties, including heart and neurological disorders as well as many types of cancers.

BENEFITS

1. No special preparation or change in the daily routine is required.
2. It can differentiate malignant from benign growth as well as spread of malignant tumours.
3. PET scans can accurately reveal the extent of a cancer and measure how most tumors respond to therapy, it helps doctors choose the best treatment for each patient.
4. PET scans of the heart can be used to determine blood flow to the heart muscle and help evaluate signs of coronary artery disease
5. PET scans of the heart can also be used to determine if areas of the heart that show decreased function are alive rather than scarred due to a prior heart attack, called a myocardial infarction.

The radioactivity is very short-lived; the radiation exposure is extremely low. The substance amount is so small that it does not affect the normal processes of the body.

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