Hypofractionated SBRT For Prostate Cancer

Radiosurgery should be ideal for treating prostate cancer because: * targeting accuracy for static targets is excellent, with an error of about 1mm, * it can adjust for intra-fractional organ motion, reducing the volume of the target PTV and therefore the dose to surrounding organs, * by using over one-hundred non-conplanar beams, the dose gradient between the prostate and surrounding tissues may be superior to that achieved with conventional linear accelerators, * the radiobiology of prostate cancer may favor large dose per fractions.