irradiation
Synonyms: radiation therapy, radiotherapy, x-ray therapy
Definition: (ih-RAY-dee-AY-shun) The use of high-energy radiation to kill cancer cells and shrink tumors. Radiation may come from outside the body (external beam) or from inside (brachytherapy). Systemic radiation therapy uses a radioactive substance, such as a radiolabeled monoclonal antibody, that circulates through the body.
|