Table 3.

Dose of OARs and significance of differences for VMAT and IMRT plans (results are averaged for five patients)

	Cord ${\mathrm{D}}_{\text{max}}$ (Gy)	Heart $V_{10}(\%)$	Heart $V_{20}(\%)$	Heart $V_{30}(\%)$	Heart $D_{\mathit{\text{mean}}}(\mathit{\text{Gy}})$
IMRT	$38.85\pm 1.53$	$94.98\pm 2.57$	$72.59\pm 1.36$	$40.67\pm 1.15$	$30.09\pm 0.46$
VMAT	$44.04\pm 0.48$	$84.83\pm 2.24$	$59.33\pm 4.65$	$40.75\pm 1.02$	$28.51\pm 0.41$
t value	3.27	4.90	10.80	0.08	4.54
p value	$<0.05$	$<0.05$	$<0.05$	$>0.05$	$<0.05$
	Whole lung $V_5(\%)$	Whole Lung $V_{10}(\%)$	Whole Lung $V_{20}(\%)$	Whole Lung $V_{30}(\%)$	Whole Lung $D_{\mathit{\text{mean}}}(\mathit{\text{Gy}})$
IMRT	$58.43\pm 3.36$	$43.66\pm 1.50$	$25.32\pm 1.03$	$21.88\pm 0.90$	$16.09\pm 0.66$
VMAT	$65.19\pm 1.95$	$36.55\pm 0.67$	$24.12\pm 0.86$	$21.96\pm 1.08$	$15.50\pm 0.72$
t value	3.52	7.88	4.33	0.17	3.42
p value	$<0.05$	$<0.05$	$<0.05$	$>0.05$	$<0.05$
	Contralateral Lung $V_5(\%)$	Contralateral Lung $V_{10}(\%)$	Contralateral Lung $V_{20}(\%)$	Contralateral Lung $V_{30}(\%)$	Contralateral Lung $D_{\mathit{\text{mean}}}(\mathit{\text{Gy}})$
IMRT	$44.21\pm 2.18$	$23.52\pm 2.28$	$2.11\pm 0.97$	‐	$7.12\pm 0.45$
VMAT	$52.37\pm 3.22$	$17.88\pm 1.41$	$1.83\pm 0.68$	‐	$5.88\pm 0.61$
t value	4.26	6.52	3.21	‐	3.13
p value	$<0.05$	$<0.05$	$<0.05$	‐	$<0.05$