Definition: Intensity Modulated Radiation Therapy (IMRT) is a precise technique of external beam radiation. Using computer-generated images of the tumor or the surgery site, the radiation oncologist can find the size, shape, and location of the area that needs treatment. During IMRT treatments, thousands of very thin radiation beams are aimed at the cancer. Each beam can be programmed to a different intensity and a different angle. These highly customized beams meet inside your body at the tumor site. Because the radiation is so carefully controlled and planned, intensity modulated radiation therapy can spare nearby healthy tissues, resulting in fewer side effects than standard external beam radiation.
Intensity modulated radiation therapy may be used for breast cancer as well as prostate, head and neck cancer.
Also Known As: IMRT, intensity modulated radiotherapy
Examples:
I underwent intensity modulated radiation therapy for breast cancer, which limited radiation exposure to nearby health tissues.
