![](https://webarchive.library.unt.edu/eot2008/20081108190725im_/http://www.cancer.gov/images/spacer.gif) |
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(...RAY-dee-AY-shun THAYR-uh-pee)
![](https://webarchive.library.unt.edu/eot2008/20081108190725im_/http://www.cancer.gov/images/spacer.gif)
| A type of radiation therapy that uses a machine to aim high-energy rays at the cancer from outside of the body. Also called external-beam radiation therapy. |
Previous Definitions: | expectant management, experimental, experimental drug, exploratory surgery, extensive-stage small cell lung cancer | Next Definitions: | external-beam radiation therapy, extracorporeal photopheresis, extracranial, extracranial germ cell tumor, extract |
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