What exactly does a PET scan measure?
What exactly does a PET scan measure? Metabolic activity (FDG) Detects pairs of gamma rays emitted indirectly by a positron-emitting radionuclide (tracer) which is introduced into the body on a biologically active molecule [fludeoxyglucose (FDG)] The concentrations of tracer imaged will indicate tissue metabolic activity by virtue of the regional glucose uptake. Can be positive in 1. Cancer 2. Inflammation 3. Mosquito bite