Intensity-Modulated Radiation Therapy (IMRT)

IMRT is an advanced form of external beam radiation therapy. The advantage of this type of radiation therapy is that radiation specialists can shape, or conform radiation doses to the exact three-dimensional shape of a tumor, making the technology ideal for use on irregularly shaped tumors located in various places throughout the body.

In IMRT, radiation specialists also can vary the amount of radiation in each beam targeted at the tumor. They also can turn the radiation on and off during treatments. The precise control and flexibility of IMRT minimizes the amount of radiation going to surrounding healthy tissue.

Common cancers treated with three-dimensional IMRT include lung, prostate, breast, head and neck, and brain tumors, as well as cancer in the bone and spinal cord.