Table 3.

Difference (dose 120 MLC ‐ dose 160 MLC) maximum, mean, and ${\mathrm{D}}_{1\text{cm}3}$ dose in brainstem between the two collimators.

	Eclipse 11.0			Prowess 5.0
BrainStem	Max. Dose	Mean Dose	$D_{1\text{cm}3}$	Max. Dose	Mean Dose	$D_{1\text{cm}3}$
Average Difference/Gy (Range)	2.0	0.6	1.4	2.6	1.3	1.8
	$(-0.6–3.8)$	$(-1.1–5.2)$	$(-1.4–4.3)$	$(-1.6–4.4)$	(0.2 ‐3.8)	(0.1–4.4)
p‐value	0.04	0.03	0.04	0.04	0.01	0.02