During a PET scan, the patient is first injected with a glucose (sugar) solution that contains a very small amount of radioactive material. A PET scan can be used to detect cancerous tissues and cells in the body that may not always be found through computed tomography (CT) or magnetic resonance imaging (MRI).
Also question is, what is the purpose of a PET CT scan?
This advanced nuclear imaging technique combines positron emission tomography (PET) and computed tomography (CT) into one machine. A PET/CT scan reveals information about both the structure and function of cells and tissues in the body during a single imaging session.
How does it work positron emission tomography?
For example, in PET scans of the brain, a radioactive atom is applied to glucose (blood sugar) to create a radionuclide called fluorodeoxyglucose (FDG), because the brain uses glucose for its metabolism. FDG is widely used in PET scanning.