Intensity modulated radiation therapy (IMRT) combines tumor imaging techniques with special linear accelerators that can deliver hundreds of thin beams of radiation from any angle. Information fed into the linear accelerator allows it to revolve around the patient, delivering radiation in a three-dimensional pattern that corresponds to the exact tumor location. Extremely precise targeting of radiation to the tumor allows doctors to deliver the maximum dose of radiation to the cancer while sparing healthy tissues. IMRT is evaluated related to radiodermatitis.