Table 5.

The difference in volumes of OARs that received the tolerance dose between rotated and original plans.

	$V_{55\mathit{\text{Gy}}}$			$V_{45\mathit{\text{Gy}}}$		$V_{12\mathit{\text{Gy}}}$
	Brain Stem	Chiasm	Opt.N	Retina	Cochlea	Lens
Mean V.(cm3)	$27.6\pm 3.4$	$0.6\pm 0.4$	$1.0\pm 0.5$	$5.5\pm 0.9$	$0.08\pm 0.03$	$0.3\pm 0.2$
$\pm 1°$	$0.2\pm 0.3$	$0.0\pm 0.1$	$0.0\pm 0.1$	$0.0\pm 0.0$	$0.0\pm 0.0$	$0.0\pm 0.0$
$\pm 3°$	$0.2\pm 0.6$	$0.0\pm 0.1$	$0.0\pm 0.1$	$0.0\pm 0.0$	$0.0\pm 0.0$	$0.0\pm 0.0$
$\pm 5°$	$0.3\pm 0.9$	$0.0\pm 0.1$	$0.0\pm 0.1$	$0.0\pm 0.1$	$0.0\pm 0.0$	$0.0\pm 0.1$
$\pm 7°$	$0.4\pm 1.3$	$0.0\pm 0.1$	$0.0\pm 0.1$	$0.1\pm 0.3$	$0.0\pm 0.0$	$0.1\pm 0.2$

${\mathrm{V}}_{55\hspace{0.17em}\text{Gy}},{\mathrm{V}}_{45\hspace{0.17em}\text{Gy}},{\mathrm{V}}_{12\hspace{0.17em}\text{Gy}}$ = volume (cm³) receiving 55 Gy, 45 Gy and 12 Gy or more, respectively