Fig. 2.

An illustrative case of successful SBRT for 58-year-old man with unfavorable intermediate risk prostate cancer. a CT scan before SBRT and 36.25 Gy in 5 fractions was prescribed for prostate cancer. b A typical DVH for Cyberknife treatment of a prostate cancer patient is shown, revealing doses to the CTV, PTV, and nearby critical structures. Take the abscissa as reference, the organizations and targets from left to right are as follows: penile bulb, right femoral head, left femoral head, bowel, urethra, rectum, bladder, PTV, CTV. c Enhanced MRI scan before SBRT. d Enhanced MRI scan 1 year after SBRT. SBRT stereotactic body radiation therapy, CT computed tomography, DVH dose-volume histogram, CTV clinical target volume, PTV planning tumor volume. The red arrows indicate tumor location before and after SBRT