A positron emission tomography (PET) scan is a diagnostic test that takes pictures of your organs and tissues working. A harmless, injectable radioactive material called a radiotracer is used during the test, as is a PET scanner. The scanner detects ill cells that take up lots of the radiotracer, suggesting a possible illness. At ILS Hospital, Howrah PET scans are done with the utmost precision and accuracy, with advanced medical equipment.

Test Details

A PET scan is a type of nuclear medicine imaging. Nuclear medicine injects small and harmless amounts of radioactive material, called radiotracers, through an IV. PET scans, in contrast to other imaging techniques, focus on internal functions and chemical processes. This makes them able to detect illness in its initial phases. Unhealthy cells in your body take in more radiotracer than healthy ones. These are referred to as “hot spots.” The PET scanner picks up the radiation and produces images of the affected tissue. PET/CT scans integrate X-ray and PET scan images.

Preparation

PET scans are outpatient exams, so you can be discharged on the day of the test. Your doctor will give you detailed guidance on preparation for the test.

In general, patients should:

• Ensure your physician has up-to-date information on all medications, vitamins, and supplements you take, and any allergies you have.
• If you are pregnant or breastfeeding, inform your doctor.
• Do not eat anything for six hours prior to the test. If you have diabetes, your physician may instruct you differently.
• Drink water only.
• If you are being tested for a heart condition, you must not consume caffeine for 24 hours prior to the test.
• Dress comfortably and avoid bringing any metal items, like jewelry, glasses, dentures, or hairpins.
• Alert your medical professional if you feel anxious when you are in a confined space. You can possibly take a mild sedative to calm you during the procedure.

How long does it take for a PET scan?

The PET scan process takes approximately two hours. It may take up to 60 minutes for your body to absorb the injected radiotracer. During this period, you must sit quietly and minimize your movements. The actual PET scan takes approximately 30 minutes. Following the exam, you will need to wait while the technologist reviews the scans to confirm they are clear.

Results and Follow-Up

A PET scan specialist radiologist will review the images, generate a report, and send it to your doctor. This should only take 24 hours.