PET-CT is an acronym that stands for Positron Emission Tomography-Computed Tomography. It is a diagnostic imaging approach that combines PET and CT scans.
A PET scan involves the injection of a radioactive tracer (such as a type of glucose) into the body. A PET scanner detects positrons emitted by the tracer. This generates visuals that depict how the tracer is utilized by the body's cells and tissues.
A CT scan, on the other hand, makes comprehensive images of the inside of the body using X-rays. The images can depict the size, form, and location of organs, tissues, and other body structures.
PET-CT, which combines these two types of scans, can give more detailed and exact images of the body's organs and tissues than either scan alone. It is most widely used in oncology to diagnose and stage tumors, but it can also be used to diagnose heart disease, neurological diseases, and infections.