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).