Radiation high dose volume,
represented by the isodose lines (pink color lines), conform very well to the
shape of prostate and seminal vesicles treatment volume (red color). Normal tissues
such as bladder (yellow object on top) and rectum (green shape on bottom) are
well spared. This normal tissue sparing allows escalation of radiation dose to
the prostate safely. For prostate cancer, higher dose improves cure rates.