What is PET?
PET is a nuclear medicine technique using a camera, which captures images of the human body's function. Compounds normally existing in the body, like simple sugars, are labeled with radioactive tracers, and are injected into the body intravenously. The tracer emits signals which are recorded by the scanner as the tracer travels through the body and/or collects in targeted organs. A computer reassembles the signals into actual images, which then show biological maps of normal organ function and failure of organ systems in disease.
The basic steps of PET imaging include radioisotope production, radiopharmaceutical chemistry, tomographic acquisition, and image re-construction.