Radiology Terms

PET-CT scan

What is a PET-CT scan?

A Positron Emission Tomography CT scan, also known as a PET-CT (or PET CT), is a medical imaging test that combines a PET scan with a CT scan.

The PET scan uses a radioactive tracer to check the function of certain organs or look for diseases such as cancer, brain disorders and heart disease.

A combined PET CT scan can be done at the same time, collecting views from two different studies on one image. While the PET scan shows changes at the cellular level, the CT scan provides anatomic information. The combined study is often better than performing the two scans separately.