Yes, a PET scan involves radiation.
A PET scan, or Positron Emission Tomography scan, uses a radioactive drug called a tracer to help visualize how your organs and tissues are functioning. The tracer emits a small amount of radiation that is detected by the PET scanner.
How Does a PET Scan Use Radiation?
During a PET scan:
- A radioactive tracer is injected: According to the reference, "a radioactive drug called a tracer will be injected into a vein." This tracer emits positrons.
- Positron Emission: The tracer emits positrons within the body.
- Detection and Image Creation: The PET scanner detects the radiation emitted by the tracer and uses this information to create detailed 3D images of the body's internal structures and functions.
Is the Radiation from a PET Scan Harmful?
While a PET scan does involve radiation, the amount is generally considered to be low. The reference specifies, "Because the amount of radiation you're exposed to in the tracer is small, the risk of negative effects from the radiation is low." However, like all medical procedures involving radiation, there are potential risks, which are weighed against the benefits of obtaining crucial diagnostic information.
Key Takeaways
- PET scans utilize radioactive tracers, making them a form of radiation exposure.
- The radiation dose is generally low, minimizing the risk of negative effects.
- The diagnostic benefits of PET scans typically outweigh the small risk associated with radiation exposure.
