Table 2.

Overview of dose constraints to the organs at risk per treatment arm

Organ	Constraints	Arm 1 (35x2Gy)	Arm 2 (20x3Gy)
Rectum	Va70	< 5%
	V65	< 15%
	V60		< 5%
	V55		< 15%
Rectal wall	V25		< 80%
	V30	< 80%
	V35		< 50%
	V41	< 50%
	V50		< 25%
	V60	< 25%
	Mean Dose	< 30Gy	< 25Gy
Anus	Mean Dose	< 25Gy	<22Gy
Anal wall	V25		< 30%
	V30	< 30%
Bladder	Dose0.1cc	< 105%	< 105%
	V70	< 25%
	V60	< 50%	< 25%
	V50		< 50%
Femoral head	V45		< 10%
	V55	< 10%
Penile bulb		ALARAb	ALARA

^aVolume; ^bAs low as reasonably achievable