Table 1.

Dose constraints for OARs

Organ at risk	Dose constraint	Aim
Rectal Wall	V18.1 Gy V29 Gy V36 Gy	<50% <20% <1 cc
Bladder Wall	V18.1 Gy V 37 Gy	<40% <10 cc
PRV_VUA and distal Urethra	V36 Gy	<1 cc
Femoral heads	V14.5 Gy	<5%
Penile bulb	V29.5 Gy	<50%
Bowel	V18.1 Gy V30 Gy	<5 cc <1 cc

OAR, organs at risk; PRV, planning organ at risk volume; VUA, vesicourethral anastomosis.