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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
No special preparation or change in the daily routine is required.
- It can differentiate malignant from benign growth as well as spread of malignant tumours.
- 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.
- PET scans of the heart can be used to determine blood flow to the heart muscle and help evaluate signs of coronary artery disease
- 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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