Skip to Content

Vanderbilt-Ingram Cancer CenterVanderbilt-Ingram Cancer Center

 

VICC toll-free number 1-877-936-8422

Radioisotope

Glossary

radioisotope

An unstable form of a chemical element that releases radiation as it breaks down and becomes more stable. Radioisotopes may occur in nature or be made in a laboratory. In medicine, they are used in imaging tests and in treatment. Also called radionuclide.

Last updated: 2014-02-26

Source: The National Cancer Institute's Dictionary of Cancer Terms (http://www.cancer.gov/dictionary)