Prostate Boost Irradiation With Stereotactic Body RT (SBRT)

Inclusion Criteria: * Histological and or clinical diagnosis of high risk adenocarcinoma of the prostate within six months of entry (stage T3 or higher and/or Gleason score 8 or higher and/or initial PSA level above 20;) * No radiographic evidence of metastatic disease to the abdomen, lymph nodes, bone or other distant organs; determined by standard staging investigations (bone scan and CT-scan of the abdomen and pelvis) or incidental findings (localized N0, M0 disease) * Patient is able to complete the quality of life questionnaires in English. * Informed consent obtained Exclusion Criteria: * • Histological diagnosis of carcinoma of the prostate more than six months prior to potential registration date; * Previous treatment for carcinoma of the prostate (other than biopsy or TURP), including bilateral orchiectomy; * Patients previously on more than twelve weeks of hormone therapy for their PrCa; * Past history of other malignancies except: adequately treated non-melanoma skin cancer or other solid tumours curatively treated with no evidence of disease for more than 3 years; * Contraindications to placement of gold seeds for daily prostate localization; * Previous pelvic RT and/or significant pelvic surgery; * Severe diverticular or inflammatory bowel disease (as determined by the treated radiation oncologist) * Previous hip replacement * PSA over 50 * IPSS 20 or higher * TRUS-based prostate * volume of \> 80 cc