Three-dimensional conformal radiation therapy (3D-CRT) is an advanced type of electron beam radiation therapy which is used as a prostate cancer treatment. 3D-CRT works by aiming an external beam of radiation at the prostate gland while trying to minimize the exposure of healthy tissue in the surrounding organs. 3D-CRT immobilizes the patient in a bed of styrofoam that is customized for his body. A computer generates a precise image of his internal organs. The radiation oncologist then aims waves of photons generated by a linear accelerator at the image to irradiate the malignant area. The waves are formed exactly to the shape of the treated to be treated so the surrounding healthy tissue is spared being damaged by radiation.
