Early Investigation of High Precision Radiotherapy Prior to Commencing Standard Radiotherapy for Prostate Cancer

"This is a dose escalation study. Participants will be allocated to the current dose level, or if the current dose level has been filled and acceptable toxicity has been established, they will be enrolled into the next dose level.~The first dose level will be 20Gy in 2 fractions to PTV and 25Gy to Gross Target Volume (GTV) if identified. The second dose level will be 22Gy in 2 fractions to PTV and 27.5Gy to GTV if identified. The dose level will be 24 Gy in 2 fractions to PTV and 30Gy to GTV if identified.~Following stereotactic boost, all participants will receive 46Gy in 23 fractions radiotherapy to the prostate / seminal vesicles +/- lymph nodes."