Table 4.

Dosimetric results for the standard VMAT and IMRT planning, averaged over the ten patients. Standard deviation is shown within parentheses

Volume		IMRT	VMAT
PTV1	V95%	$95.8\%\pm 1.3\%$	$97.1\%\pm 2.3\%$
	V90%	$99.3\%\pm 0.4\%$	$99.4\%\pm 0.2\%$
	HI (D95/D5)	$1.09\pm 0.03$	$1.12\pm 0.02$
PTV2	V95%	$96.9\%\pm 0.5\%$	$97.6\%\pm 1.4\%$
	V90%	$99.0\%\pm 0.3\%$	$99.2\%\pm 0.7\%$
	HI (D95/D5)	$1.19(\pm 0.05$	$1.17\pm 0.03$
PTV3	V95%	$96.8\%\pm 1.2\%$	$97.4\%\pm 1.8\%$
	V90%	$99.2\%\pm 0.4\%$	$99.4\%\pm 0.6\%$
	HI (D95/D5)	$1.21\pm 0.09$	$1.16\pm 0.08$
Spinal cord PRV		$46.8\pm 0.7\text{Gy}$	$47.4\pm 1.3\text{Gy}$
Brainstem PRV		$56.6\pm 1.1\text{Gy}$	$56.9\pm 3.6\text{Gy}$
Optic chiasm and optic nerves		$45.5\pm 5.6\text{Gy}$	$45.7\pm 3.8\text{Gy}$
Cochleae		$39.3\pm 1.6\text{Gy}$	$37.1\pm 2.9\text{Gy}$
Parotids		$25.9\pm 3.2\text{Gy}$	$26.8\pm 1.5\text{Gy}$
Larynx		$48.3\pm 1.2\text{Gy}$	$45.6\pm 4.3\text{Gy}$
Oral cavity		$50.7\pm 1.6\text{Gy}$	$48.9\pm 8.7\text{Gy}$
Eyes		$29.7\pm 11.9\text{Gy}$	$31.2\pm 9.7\text{Gy}$