Table 1.

Dose-response parameters for probit model

Group	Volume V (cc)	EQD03		3fxED
		m	TD50(V), (Gy)	TD50(V), (Gy)
De novo	1.0	0.2506	108.0	27.0
De novo	0.1	0.2506	164.3	34.2
De novo	0 (Dmax)	0.2680	188.0	36.9
Re-treatment	0 (Dmax)	0.3438	188.0	36.9

^*The slope for D_1cc was constrained not to exceed the slope for D_0.1cc or D_max.

^†The TD₅₀(V) for the re-treatment cases was constrained not to exceed that for the de novo cases.