Table 2.

Treatment planning dose-volume constraints for normal tissues

Structure	Parameter	Dose-volume constraint
		PTV 40 Gy	PTV 37.5 Gy
Rectum	Max point dose, Gy	41.2	38.6
	D1cc, Gy	38.5	NA
	Mean dose, Gy	13 (16.4∗)	12.2 (15.4∗)
	V24 Gy, %	<25	<25
	V30.15 Gy, cm3	≤8	≤8
Bladder	Max point dose, Gy	42	39.4
	D53%, Gy	24	24
	D1cc	<103% of prescription dose
Femoral heads	Max point dose, Gy	31	31
Large bowel	Max point dose, Gy	29	29
Small bowel	Max point dose, Gy	26.5	26.5
Bladder trigone	Max point dose, Gy	38	38
Urethra	Max point dose, Gy	42	39.4
	D1cc, Gy	40	NA

Abbreviations: Max = maximum; NA = not applicable; PTV = planning target volume.

^∗This criteria was used if the first criterion is not achieved.