PET-CT is a nuclear medicine technique that combines, the functional PET and anatomical CT images to give detailed information about cancer. The CT scan takes a series of x-rays from all around your body and the PET scan uses a mildly radioactive drug to show up areas of your body where cells are more active than normal. A PET/CT scan reveals information about both the structure and function of cells and tissues in the body during a single imaging session.

By combining information about the body’s anatomy and metabolic function, a PET/CT scan provides a more detailed picture of cancerous tissues than either test does alone. The images are captured in a single scan, which provides a high level of accuracy.

PET-CT has revolutionized medical diagnosis in many fields, by adding precision of anatomic localization to functional imaging, which was previously lacking from pure PET imaging. These scanners are available only in the major cancer hospitals.


PET-CT scan can help to:

  • diagnose cancer
  • stage a cancer, so doctors know how big it is and whether it has spread
  • decide whether you can have surgery to remove your cancer
  • decide which is the best treatment for your cancer
  • find the place in the body where your cancer first started to grow (primary cancer)
  • monitoring the response to treatment
  • check whether your cancer has come back