Androgen Suppression Combined With Elective Nodal Irradiation and Dose Escalated Prostate Treatment: A Non-Inferiority, Phase III Randomized Controlled Trial of Stereotactic Body Radiation Therapy Versus Brachytherapy Boost in Patients With Unfavourable Risk Localized Prostate Cancer

This study is being done to answer the following question: Is the strategy to give higher doses of radiotherapy treatment over a shorter period of time using special equipment and fewer treatments (also known as Stereotactic Body Radiation Therapy or SBRT) as effective as usual external radiation therapy given with a brachytherapy boost (which involves radiation sources inserted directly into the prostate)>=

Radiation: Radiation SBRT only