positron

ghts into the metabolic and physiological processes within the human body. As a hybrid technology combining nuclear medicine and imaging sciences, PET has revolutionized diagnostic capabilities, particularly in

diotracer is fluorodeoxyglucose (FDG), which mimics glucose metabolism. Other tracers include oxygen-15 (for blood flow), nitrogen-13 (for oxygen utilization), and carbon-11 (for various biochemical processes). How does positron emission occur in PET