Figure 1
From: Stereotactic body radiation therapy (SBRT) for prostate cancer in men with large prostates (≥50 cm3)
Treatment Planning and Delivery. (a) The volumes represent the GTV (red), PTV (blue), rectum (light green), and bladder (yellow). The prescription isodose line (82%) is denoted by the thick cyan line. (b) A typical dose-volume histogram (DVH) for Cyberknife treatment of a prostate cancer patient is shown, revealing doses to the GTV, PTV, and nearby critical structures, including the rectum, bladder, and penile bulb.