Positron emission tomography (PET) scans are a type of medical imaging test that uses a small amount of radioactive tracer to create images of the inside of the body. PET scans are used to diagnose and monitor a variety of conditions, including cancer, heart disease, and neurological disorders.

Do PET Scans Use Radiation?

How Do PET Scans Work?

PET scans work by injecting a small amount of radioactive tracer into the body. The tracer is absorbed by cells and tissues in the body, and it emits positrons, which are positively charged particles. These positrons then collide with electrons in the body, producing gamma rays. The gamma rays are detected by a PET scanner, which creates images of the inside of the body based on the distribution of the radioactive tracer.

Do PET Scans Use Radiation?

Yes, PET scans do use radiation. However, the amount of radiation used in a PET scan is very small and is considered safe for most people. The amount of radiation used in a PET scan is typically less than the amount of radiation that a person is exposed to during a single chest X-ray.

What Are the Risks of PET Scans?

The risks of PET scans are generally low, but they can include:

  • Radiation exposure: The amount of radiation used in a PET scan is very small, but it can still pose a risk of cancer. The risk of cancer from a PET scan is very low, but it increases with the number of PET scans a person has.
  • Allergic reaction: Some people may experience an allergic reaction to the radioactive tracer used in a PET scan. Symptoms of an allergic reaction can include hives, itching, and swelling.
  • Kidney damage: The radioactive tracer used in a PET scan can be harmful to the kidneys. People with kidney problems may need to take special precautions before having a PET scan.

Who Should Not Have a PET Scan?

PET scans are generally not recommended for pregnant women or children under the age of 2. PET scans may also not be recommended for people with certain medical conditions, such as kidney problems or a history of allergic reactions.

Conclusion

PET scans are a valuable tool for diagnosing and monitoring a variety of medical conditions. However, it is important to be aware of the risks of PET scans before having one. Talk to your doctor about the risks and benefits of PET scans before deciding whether to have one.