<qa>  What is the effect of hypoIGRT treatment on localized prostate cancer?Hypofractionated intensity modulated and image guided radiotherapy HypoIGRT with fewer high-fraction-size treatments would be beneficial for prostate cancer because it would deliver a larger biological-equivalent dose to the tumor than would conventional treatment in 1.8-2.0 Gy fractions, while maintaining a similar or lower incidence of late normal tissue reactions. Thus, the investigators aim to assess the hypothesis that HypoIGRT treatment for localized prostate cancer will improve the therapeutic ratio by either: 