PET scan
What Is A PET Scan?
A PET scan is a type of imaging test that uses a special type of camera and a small amount of radioactive material to create images of organs and tissues inside the body. It is commonly used to diagnose and evaluate many types of cancer, as well as other diseases, such as Alzheimer's, heart disease, and brain disorders.
Preparation for the PET Scan
Before the PET scan, your doctor will likely advise you to avoid anything containing sugar the day before. This means you'll be asked to fast for at least 8 hours prior to the scan. Also, please inform your doctor if you are pregnant or breast-feeding, as well as any prescription or over-the-counter medications you are taking so that the appropriate precautions can be taken.
The Procedure
The PET scan procedure itself is relatively simple and painless. While you lie on a padded table, a technologist will inject a glucose solution with a small amount of radioactive material into your bloodstream. During the scan, the radiotracer travels throughout your body and is absorbed by body tissues. The camera is used to detect areas of higher radioactivity, which can reveal information about the functioning of the organ or tissue being studied.
Types of PET Scans
There are two main types of PET scans: a full body scan and a localized scan. A full body scan is often used to screen for cancer in people with no signs or symptoms of the disease, while a localized scan is used to study a specific area of the body, such as the brain or heart.
What Are the Risks?
- The radiotracer used in the PET scan is generally safe and poses very little risk, as the amount of radiation exposure is relatively low.
- The PET scan can be stressful for some patients, particularly those who may be claustrophobic.
- There is a small chance of having an allergic reaction to the radiotracer or the contrast material used for the scan.
When Is a PET Scan Recommended?
A PET scan is most often used to help diagnose or stage cancer, as it can detect areas of abnormal cell growth that may not be seen with other imaging tests, such as an MRI or CT scan. It is also used to help monitor the effectiveness of cancer treatments, as well as assess the extent of certain heart conditions.
Conclusion
A PET scan is a safe, noninvasive imaging test that can be used to diagnose a variety of medical conditions, including cancer, Alzheimer's, heart disease, and brain disorders. While there are some risks associated with the procedure, the amount of radiation exposure is low and it has proven itself to be useful in the diagnosis and treatment of these conditions. It is important to speak to your doctor to determine if a PET scan is the right test for you.
