On the day of implantation, the patient will be brought into the operating room and 'timeout' performed. He will be placed in dorsal lithotomy position after anesthetic (either general or spinal) is administered. A foley catheter will be placed into the urethra. Ultrasound images will be acquired and a dosimetric plan developed based on the intraoperative ultrasound. Computerized dosimetric algorithms are used to assist the physician in creating a plan which adequately treats the prostate while minimizing dose to urethra and rectum.