Table 4.

The normalized BED saturation threshold at which gBEUD, averaged over the nine HDR boost plans, equals the corresponding mean IMRT gBEUD (“mean” column). The “One std dev” column gives the ${\text{BED}}_{\text{sat}}^{\text{gBEUD}}$ value at which the HDR mean gBEUD exceeds IMRT gBEUD by one standard deviation (gBEUD_HDR=gBEUD_IMRT+σ_IMRT).

Organ	igIMRT		cIMRT-S
	Mean	One std dev	Mean	One std dev
Rectum a=4.4	1.4	>2.0	>2.0	>2.0
Rectum a=8.3	1.05	1.3	1.55	>2.0
Rectum a=16.7	0.95	1.0	1.2	1.4
Bladder a=7.7	>2.0	>2.0	>2.0	>2.0