Hypofractionated Radiotherapy for Localized Prostate Cancer (With CyberKnife or With IMRT)

Inclusion Criteria:- Eligible patients will have clinical stage T1c through T2b, initial PSA level \<10 and a biopsy Gleason score of 3+3 or 3+4 with fewer than 50% of biopsy cores involved. * Patients who have had any form of prior curative treatment (surgery, radiotherapy, cryotherapy) will not be eligible. A prior course of hormone therapy of less than 3 months duration will be allowed. * Adult men will be considered. * No life expectancy restrictions will apply. * Performance Status will not be considered. * No requirements for organ or marrow function will be made * Ability to understand and the willingness to sign a written informed consent document. Exclusion Criteria:- No prior prostate treatment will be allowed. * The use of other concurrent Investigational Agents will not be allowed. * No exclusion requirements due to co-morbid disease or incurrent illness. * No requirements regarding history of allergic reactions. * Pregnancy or nursing patients is not applicable (ie. patients are male).