IMRT, or intensity modulated radiation therapy, uses a radiation-blocking device, also known as a Multi-Leaf Collimator (MLC), to block some of the radiation. This causes the beam to take different shapes that are contoured to fit perfectly with the patient’s tumor. Because the tumor can be contoured more efficiently with IMRT, the radiation doses to healthy surrounding tissues are minimized. With less radiation to healthy tissues, the patients treated with IMRT experience fewer harsh side effects from the radiation therapy.
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