Positron Emission Tomography (PET) is primarily used for diagnosis of cancer and neuro/degenerative diseases like Alzheimer’s. The system is a combo unit that includes a 16-slice Computed Tomography (CT) scanner. This is a fixed unit as opposed to a mobile unit. A good analogy for how the PET and CT work together is to think of a weather map. As Doppler radar shows colors that indicate rain, PET shows colors that indicate cancer. The CT portion identifies the organs in high resolution, where it’s raining on the map. The CT portion also provides backup to the 64-slice CT scanner during times of high volume so more patients can be accommodated.