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IMRT has also been used in limited situations to treat breast, thyroid, lung, as well as in gastrointestinal, gynecologic malignancies and certain types of sarcomas. IMRT may also be beneficial for treating pediatric malignancies. Radiation therapy, including IMRT, stops cancer cells from dividing and growing, thus slowing or stopping tumor growth. In many cases, radiation therapy is capable of killing all of the cancer cells, thus shrinking or eliminating tumors.
Lower doses of radiation to normal tissues means a tremendous reduction in side effects. IMRT incorporates several beams coming from different angles to envelope the tumor and the dose intensity of each beam is modulated by changing the shape of the fields during treatment.