Table 4.

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

	Eclipse 11.0		Prowess 5.0
Spinal Cord	Max. Dose	$D_{1\text{cm}3}$	Max. Dose	$D_{1\text{cm}3}$
Average Difference/Gy (Range)	1.6	1.7	1.5	1.2
	(0.0–8.3)	(0.5– 6.6)	(0.5–5.6)	(0.5–5.5)
p‐value	0.01	0.01	0.04	0.02