Positron emission tomography (PET) is a test that makes use of a particular kind of camera and a tracer (radioactive chemical) to take a look at organs within the physique. The tracer usually is a particular form of a substance (equivalent to glucose) that collects in cells which can be using a whole lot of power, similar to most cancers cells.
To conduct the scan, a brief-lived radioactive tracer isotope is injected into the living topic (often into blood circulation). Each tracer atom has been chemically incorporated right into a biologically energetic molecule. There is a waiting interval whereas the active molecule becomes concentrated in tissues of curiosity; then the subject is placed in the imaging scanner. The molecule most commonly used for this function is F-18 labeled fluorodeoxyglucose (FDG), a sugar, for which the ready interval is often an hour. During the scan, a file of tissue concentration is made as the tracer decays.
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The picture reveals how components of the affected person’s body perform by the way they break down the radiotracer. A PET image will show completely different ranges of positrons in keeping with brightness and color. When you arrive for the scan, you might have to placed on a hospital gown. Or you might have to take off garments or jewellery that could get in the way in which. PET scan is used if other imaging tests are unclear, inconclusive or surgical procedures usually are not doable. PET is a precious technique for some diseases and issues, as a result of it is possible to focus on the radio-chemical compounds used for specific bodily features.