Construction safety and health goetsch pdf forward this error screen to sharedip-10718044127. Three-dimensional images of tracer concentration within the body are then constructed by computer analysis. In modern PET-CT scanners, three-dimensional imaging is often accomplished with the aid of a CT X-ray scan performed on the patient during the same session, in the same machine. However, although on a minority basis, many other radioactive tracers are used in PET to image the tissue concentration of other types of molecules of interest.

One of the disadvantages of PET scanners is their operating cost. PET is both a medical and research tool. PET is also an important research tool to map normal human brain and heart function, and support drug development. PET is also used in pre-clinical studies using animals, where it allows repeated investigations into the same subjects.