Hypofractionated Focal Lesion Ablative Microboost in prostatE Cancer

SBRT technique with 35 Gy in 5 weekly fractions and an additional simultaneously integrated focal boost to the tumor nodule(s) visible on MRI up to 50 Gy. In addition, patients will be asked to undergo 5 additional MRI scans (\~15 min/scan) without contrast enhancement prior to each radiation session as well as blood sampling for translational research (radiogenomics) and Biobank purposes.