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 PET is an acronym for Positron Emission Tomography. PET is a test that uses special imaging cameras and a radioactive type of sugar to produce pictures of the function and metabolism of cells in the body. Because cancer cells are generally hyper-metabolic, PET imaging is primarily used for diagnosing and learning the extent of cancers.
CT stands for Computerized Tomography. CT is an x-ray test that generates a detailed view of the anatomy or structure of organs and tissues in the body. The CT scan can show the dimension of vessels, lymph nodes, and organ systems.
A PET/CT scan merges both technologies into a single machine. It provides a picture of function (PET), a picture of anatomy (CT), and a merged picture of both the body's metabolism and structure.
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