An IMRT/VMAT Technique for Nonsmall Cell Lung Cancer

Table 2

The data for PTV coverage for IMRT, VMAT, and Hybrid IMRT/VMAT plans.

	IMRT	VMAT	Hybrid	IMRT versus VMAT	IMRT versus Hybrid	VMAT versus Hybrid
	Mean ± SD	Mean ± SD	Mean ± SD	value	value	value
PTV
(Gy)	64.6 ± 0.5	64.6 ± 0.5	65.0 ± 0.3	>0.05	<0.05	<0.05
(Gy)	72.6 ± 1.7	73.3 ± 1.7	71.5 ± 1.0	>0.05	<0.05	<0.05
CN	0.79 ± 0.05	0.86 ± 0.04	0.88 ± 0.03	<0.05	<0.05	<0.05
HI (%)	11.3 ± 0.7	12.6 ± 0.6	9.8 ± 0.3	<0.05	<0.05	<0.05

PTV is planning target volume, IMRT is intensity modulated radiation therapy, VMAT is volumetric modulated arc therapy, CN is conformation number, and HI is homogeneity index.