Single Fraction Early Prostate Irradiation (SiFEPI)

Expected benefit(s) of the trial * Improved quality of life during brachytherapy on account of the absence of radioactive seeds in the prostate: * Fewer early urinary complications, * No urine filtration, * No post-operative use of condoms, * No 2-year ban on cremation following treatment, * Health cost savings, * Acquisition of dosimetric data for inverse optimization. Predictable risk(s) for patients Predictable risks in the context of this trial involve the frequency of essentially urinary disorders. Methodology Open, monocentric, phase I-II study.