The standard radiotherapy technique for delivering radiation therapy to the pelvis following a hysterectomy involves a technique which also causes a large amount of normal tissue to receive radiation. This can cause both early and late side effects, which may be severe. The new technique of intensity modulated radiotherapy (IMRT) has been used to help spare normal tissue, especially tissue of the small bowel. This is an advanced new technology that delivers the high-dose of radiation to the target area but avoids the normal tissue. Using CT scans, the target is outlined by the doctors before treatment. However, sometimes organs in the pelvis move throughout the course of treatment. Using CT scans during treatment and re-outlining the target may help to deliver more radiation to the cancer tissues and less to the surrounding normal areas.