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

Risks

Considerations