Definition of intensity modulated radiation therapy (intensity-modulated radiation therapy (imrt))
Intensity-modulated radiation therapy (IMRT) is an advanced type of radiation therapy used to treat cancer and noncancerous tumors. IMRT uses advanced technology to manipulate beams of radiation to conform to the shape of a tumor.
IMRT uses multiple small radiation beams of varying intensities to precisely radiate a tumor. The radiation intensity of each beam is controlled, and the beam shape changes throughout each treatment. The goal of IMRT is to bend the radiation dose to avoid or reduce exposure of healthy tissue and limit the side effects of treatment.