Nearby: Atlanta, GA 30308

Access Your Account

New to Healthgrades?

Join for free!

Or, sign in directly with Healthgrades:

Doctors and their Administrators:
Sign Up or Log In


Should You Consider a Clinical Trial?

If you’re interested in a clinical trial related to cancer, consider the following information.

What is a nuclear scan?

PET/CT scanner

A nuclear scan is an imaging test that uses imaging technology and trace amounts of radioactive materials, called radiotracers, to diagnose and monitor diseases and treatments. Nuclear scans can show the structure and function of most body organs and tissues. Doctors use nuclear scans to evaluate and treat a wide variety of conditions, including cancer, coronary artery disease, and seizure disorders.

In a nuclear scan, the radiotracer illuminates organs and tissues by releasing radiation inside the body, instead of targeting the radiation from outside the body, as with X-rays. Nuclear scans are based on your body’s ability to absorb, or take up, certain substances. Body tissue that is infected, inflamed, or growing abnormally (such as a cancer cell) absorbs the substance differently—usually more—than other tissues. Special cameras (nuclear scanners) detect the radiation once it is absorbed into your body.

Nuclear scans go beyond showing the structure of your body. They provide important information about how organs and tissues are functioning that generally cannot be learned using other imaging methods. Nuclear scans can also identify some diseases and conditions in their earliest, most treatable stage. 

A nuclear scan is only one method used to diagnose and treat various diseases and conditions. Discuss all of your testing options with your doctor to understand which options are right for you.  

Types of nuclear scans

General types of nuclear scans include:

  • Gallium scan looks for infection, inflammation or cancer in certain organs or in the whole body.

  • PET scan (positron emission tomography) evaluates such functions as blood flow, oxygen use, and glucose metabolism. Doctors often use PET scans to evaluate cancer, heart disease, and nervous system problems to see how they are responding to treatment.

  • PET/CT is a combination PET and CT scan to diagnose, stage or restage cancer and evaluate the treatment plan. PET/CT scans create three-dimensional (3-D) pictures to pinpoint the exact location of cancer and other diseased tissue.

  • SPECT scan (single photon emission computed tomography) creates 3-D images to show how blood flows to tissues and organs. SPECT scans are particularly useful in diagnosing heart and blood vessel conditions.

Specific types of nuclear scans include:

  • Bone scan checks for infection and bone cancer.

  • Gallbladder scan checks gallbladder function and helps find the cause of upper abdominal pain.

  • MUGA (multiple gated acquisition) scan and other nuclear heart scans evaluate the pumping of the heart, how blood is flowing to the heart muscle, and if heart muscle is damaged.

  • RBC scan (red blood cell) helps to identify bleeding along the gastrointestinal tract

  • Renal scan checks kidney function.

  • Thyroid scan checks for hyperthyroidism (overactive thyroid), thyroid cancer, and thyroid nodules.

Medical Reviewers: William C. Lloyd III, MD, FACS Last Review Date: Sep 4, 2016

© 2016 Healthgrades Operating Company, Inc. All rights reserved. May not be reproduced or reprinted without permission from Healthgrades Operating Company, Inc. Use of this information is governed by the Healthgrades User Agreement.

View Sources

Medical References

  1. General Nuclear Medicine.
  2. Nuclear scans. American Cancer Society.
  3. What is a Nuclear Heart Scan? National Heart Lung and Blood Institute.
  4. Nuclear Medicine Imaging. American Society of Radiologic Technologists.

You Might Also Like

10 Things Doctors Want You to Know About Lung Cancer

Doctors say there are many promising new therapies today that are revolutionizing how they attack lung cancer.

What is Immunotherapy and How Does It Fight Cancer?

Immunotherapy is a group of treatments that help your immune system find and fight cancer.

Share via Email


Lung Cancer By the Numbers

Up Next

Lung Cancer By the Numbers