Therapy, external beam radiation

Cancer 101: Cancer Explained

Medical Definition of Therapy, external beam radiation

Therapy, external beam radiation: Radiation focused from a source outside the body on the affected area (a cancer) within the body. It's much like getting a diagnostic x-ray, but using a more potent x-ray beam and giving it over a longer period of time per dose with usually multiple doses given over multiple days.


Quick GuideUnderstanding Cancer: Metastasis, Stages of Cancer, and More

Understanding Cancer: Metastasis, Stages of Cancer, and More

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Reviewed on 7/1/2016

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