Positron Emission Tomography (PET) Scan - Frequently Asked Questions

Frequently Asked Questions

1.Which doctor does a PET scan or Positron Emission Tomography Scan?

This radiological procedure is done by a qualified radiologist.

2. What does a PET scan reveal?

PET scan images reveal the physiological functioning of the tissues or organs that are studied. CT or MRI scan shows the size and shape of the organs while PET scan shows the functioning.

3. What should we avoid before a PET scan procedure?

The patient must not consume caffeine, alcohol or tobacco 24 hours prior to the PET scan. The patient must not consume food for about 8 hours before the scan, however is allowed to can drink water.

4. Are PET scans painful?

No. PET scanning is not painful. The patient needs to lie down on his or her back for a long time in a narrow table that slides through a tunnel-like PET machine. This position may be uncomfortable or cause some body pain. If the patient is claustrophobic, he needs some assurance and supportive counseling.

5. How long does PET scan procedure take?

After the radioactive dye is injected into the patient, he has to wait for an hour for the dye to spread to the target site. PET procedure inside the scanner may take about 30 to 90 minutes, depending on the area of scanning. The patient can go home right after the procedure.

6. What care has to be taken after the PET procedure?

The patient needs to take a lot of water for the next 24 hours to flush out the radioactive tracer out of the body.

7. How long does a PET scan take?

Once you're ready to start the scan, you'll be asked to lie on your back on a platform. The platform will enter a long tube where the PET scan is performed. The scan will take 20 to 40 minutes. It's very important to remain still during the test.

8. Do PET scans confirm cancer?

Positron emission tomography (PET) scans detect early signs of cancer, heart disease and brain conditions. It involves an injection of a safe radioactive tracer that helps detect diseased cells.

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