what is PET scan
A positron emission tomography (PET) scan is an imaging test that allows doctors to check for disease in your body. The scan uses radioactive tracers in a special dye.These tracers are injected into a vein in your arm and are then absorbed by your organs and tissues.he PET scan is able to measure blood flow, oxygen use, glucose metabolism (how your body uses sugar), and much more. A PET scan is typically an outpatient procedure, meaning that you will be able to go about your day after the test is complete.