Intensity Modulated Radiotherapy (IMRT) and Image Guided Radiotherapy (IGRT) Intensity-modulated radiation therapy (IMRT) is an advanced form of 3-DCRT. It uses sophisticated software and hardware to vary the shape and intensity of radiation delivered to different parts of the treatment area. Learn how radiation therapy kills or slows cancer cells by damaging their DNA. Find out about the types, uses, side effects, and costs of radiation therapy for different cancers. Radiation therapy , also called radiotherapy , is a type of cancer treatment. This treatment uses beams of intense energy to kill cancer cells. Radiation therapy most often uses X-rays. But other types of radiation therapy exist, including proton radiation. Modern methods of radiation are precise. Introduction Radiotherapy or radiation treatment is defined as the treatment of diseases (mostly malignant) with ionizing radiation. The various types of ionizing radiation are X-rays, gamma rays, electrons; neutrons etc. but rays and high energy X-rays are in common practice. Ionizing radiation are capable of damaging the genetic material (DNA) in vivo without significant deleterious effects on normal tissues. Usually, X-rays are generated from X-ray tube of a Lineal Accelerator and rays ...
