🔬 Illuminating Disease: The Technology and Vital Clinical Applications of Positron Emission Tomography
Description:Â An explanation of Positron Emission Tomography (PET), detailing how this advanced nuclear medicine imaging technique visualizes metabolic function to diagnose, stage, and monitor diseases like cancer.
Positron Emission Tomography (PET) is a powerful, non-invasive medical imaging technique that provides a unique view of the body's functional, or metabolic, activity, rather than just its structure. Unlike X-rays or standard Computed Tomography (CT) scans, which show anatomy, PET scans visualize processes at the cellular level. This is achieved by injecting the patient with a small dose of a radioactive tracer, usually fluorodeoxyglucose (FDG), a glucose analogue. Because metabolically active cells, such as those in tumors, consume glucose at a much higher rate, the tracer accumulates in these areas, emitting signals that the scanner detects.
The core technology of the PET scanner relies on detecting pairs of gamma rays that…