PET scan

Positron emission tomography; Tumor imaging - PET; PET/CT

A positron emission tomography scan is a type of imaging test. It uses a radioactive substance called a tracer to look for disease in the body.

A positron emission tomography (PET) scan shows how organs and tissues are working.

  • This is different than MRI and CT scans. These tests show the structure of, and blood flow to and from organs.
  • Machines that combine the PET and CT images, called a PET/CT, are commonly used.
Thyroid enlargement - scintiscan

This image shows the enlargement of the thyroid gland and extension down behind the breastbone (retrosternal space). The image, called a scintiscan, was generated using a radioactive isotope.

How the Test is Performed

How to Prepare for the Test

How the Test will Feel

Why the Test is Performed

Normal Results

What Abnormal Results Mean