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Positron emission tomography Quiz
Positron emission tomography is a nuclear medicine imaging technique which produces a three-dimensional image or picture of functional processes in the body.
The system detects pairs of gamma rays emitted indirectly by a positron-emitting radionuclide , which is introduced into the body on a biologically active molecule.
Images of tracer concentration in 3-dimensional or 4-dimensional space within the body are then reconstructed by computer analysis.
In modern scanners, this reconstruction is often accomplished with the aid of a CT X-ray scan performed on the patient during the same session, in the same machine.