Table III.

Averages of the average γ values and averages of the fraction of points with γ<1 with 2% /2 mm and 3% /3 mm criteria for the 79 dynamic multileaf collimator (DMLC) and 29 segmented multileaf collimator (SMLC) intensity modulated radiation therapy (IMRT) fields. The one-standard deviation for each quantity is given in parenthesis. For each IMRT type, one-way paired ANOVA tests indicated that the improved gamma results for the hybrid method is statistically significant.

		2% /2 mm		3% /3 mm
IMRT type	Method	$\overline{\stackrel{‒}{\gamma }}$	% pass γ<1	$\overline{\stackrel{‒}{\gamma }}$	% pass γ<1
DMLC	Hybrid	0.38 (±0.08)	92.2 (±3.7)	0.25 (±0.05)	99.0 (±0.9)
DMLC	PINNACLE3 7.6c	0.4 (±0.1)	90.0 (±4.3)	0.27 (±0.08)	98.2 (±2.3)
DMLC	Analytic 2	0.41 (±0.08)	89.0 (±4.2)	0.28 (±0.05)	97.0 (±2.2)
DMLC	Analytic 1	0.85 (±0.2)	66.1 (±9.7)	0.56 (±0.14)	83.0 (±7.1)
SMLC	Hybrid	0.27 (±0.1)	94.5 (±6.1)	0.19 (±0.08)	98.3 (±2.8)
SMLC	PINNACLE3 7.6c	0.34 (±0.2)	92.2 (±7.7)	0.22 (±0.12)	97.1 (±4.3)
SMLC	PINNACLE3 6.2b	0.41 (±0.22)	89.2 (±9.5)	0.27 (±0.14)	96.0 (±4.9)