contouring nuances, OAR, prostate cancer radiotherapy, risk stratification, PSA level, intensity-modulated radiotherapy versus stereotactic body radiotherapy, SBRT, moderate hypofractionation, nodal coverage, RTOG pelvis, IMRT, rectum, define post boundary of prostate, anatomy of LA, PR, PC, IC, Denoviller's Fascia, MRF, PR sling, disappearance of P-rectal fat, axial, sag, exclude mesorectum and levator ani group, rectum/rectal delineation, UB versus subsites in SBRT, trigone dose, GU toxicity, full or empty bladder, prostatic urethra, urethra sparing, bulb penis, penile bulb, CT/MR appearance, NVB coursing, bowel, bowel bag, femur, quality of life, genitourinary toxicity, IGRT, absorbable spacer hydrogel