PET scan
PET scan
Positron Emission Tomography (PET scan) (pronunciation: /pɛt skæn/) is a type of medical imaging technique that uses a radioactive substance, known as a radiotracer, to visualize and measure changes in metabolic processes, and in other physiological activities.
Etymology
The term "Positron Emission Tomography" is derived from the process it uses to generate images. "Positron" refers to the type of particle emitted by the radiotracer, "Emission" refers to the release of these particles, and "Tomography" refers to the imaging technique that creates a cross-sectional, three-dimensional image of the body.
Procedure
A PET scan involves the injection of a small amount of a radioactive substance, usually fluorodeoxyglucose (FDG), which is a form of glucose. The scanner detects signals from the radiotracer as it accumulates in various organs and tissues, which are then processed by a computer to produce multi-dimensional images.
Uses
PET scans are used to diagnose, plan treatment for, and evaluate the progress of a variety of diseases, including cancer, heart disease, and neurological disorders. They can provide information about the body's metabolism, blood flow, and the functioning of organs and tissues.
Related Terms
See Also
External links
- Medical encyclopedia article on PET scan
- Wikipedia's article - PET scan
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