Why is a PET scan performed?

 Your doctor may order a PET scan to inspect your blood flow, your oxygen intake, or the metabolism of your organs and tissues. PET scans show problems at the cellular level, giving your doctor the best view of complex systemic diseases.

PET scans are most commonly used to detect:

Cancer

Cancer cells can have a higher metabolic rate than noncancerous cells. Because of this high level of chemical activity, cancer cells often show up as bright spots on PET scans. For this reason, PET scans are useful both for detecting cancer and for:

  • seeing if the cancer has spread
  • seeing if a cancer treatment like chemotherapy is working
  • checking for a cancer recurrence

However, these scans should be read carefully and explained by a doctor, as it’s possible for noncancerous conditions to look like cancer on a scan. It’s also common for solid tumors to fail to appear on PET scans.

Heart problems

PET scans can reveal areas of decreased blood flow in the heart. This is because healthy heart tissue tends to take in more of the tracer than unhealthy tissue or tissue that has decreased blood flow.

Different colors and degrees of brightness on the scan show different levels of tissue function. This information can help you and your doctor decide how to move forward with treatment.

Learn more about the heart PET scan.

Brain disorders

Glucose is the main fuel of the brain. During PET scans, tracers are “attached” to compounds such as glucose. By detecting radioactive glucose, the PET scan can show which areas of the brain are using glucose at the highest rates.

When a specialist interprets the scan, they can see how the brain is working and check for any irregularities.

Learn more about the brain PET scan.

PET scans are used to help diagnose and manage many CNS disorders, including:

Location: Bengaluru, Karnataka, India

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