A prostate tumor is a moving target. Body movement from breathing or coughing and normal movement of the organs within the body can change the location of a tumor between and during radiotherapy treatments. Traditionally, radiation oncologists would expand the treatment area to ensure the moving target is irradiated. However, in doing so, healthy tissue adjacent to or near the prostate may be affected, leading to a high rate of urinary, bowel, and sexual side effects. Calypso GPS for the Body® technology is different. The Calypso 4D localization system uses real-time tumor tracking to keep external radiation focused on the tumor and not surrounding healthy tissue, thereby minimizing side effects, such as incontinence and erectile dysfunction.
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