Table 2.

Typical OAR optimization parameters for IMRT

Organ	Threshold dose (Gy)	Volume above limit (%)
Bladder	30	80
	40	40
	0	50
Small Bowel	30	40
	40	30
	0	50
Genitalia/perineum	30	35–45
	40	5–10
	0	48
Iliac crests	10	35–45
	20	25–30
	0	50
Femoral heads	45	5
	0	55