Gamma Knife and volumetric modulated arc therapy stereotactic radiosurgery plan quality and OAR sparing comparison for pituitary adenomas and vestibular schwannomas

. 2018;5(3):237–247.

Table 3b. OAR Sparing for Vestibular Schwannoma cases

OAR	Mean ± SD		p
OAR	Gamma Knife	VMAT	p
Brainstem D_max (Gy)	11.67 ± 4.56	12.22 ± 4.55	> 0.05
Brainstem D_0.5cc(Gy)	6.12 ± 3.56	6.08 ± 3.22	> 0.05
Brainstem D_1cc(Gy)	4.90 ± 3.22	4.23 ± 2.58	> 0.05
Cochlea D_max (Gy)	11.53 ± 3.24	10.29 ± 3.36	> 0.05
Cochlea D_mean (Gy)	7.31 ± 2.7	7.23 ± 3.13	> 0.05
Brain V_25%Rx (cc)	24.38 ± 22.41	26.57 ± 21.80	> 0.05

Abbreviations: VMAT = Volumetric modulated arc therapy; SD = standard deviation; p = Wilcoxon signed rank test, comparison of Gamma Knife and VMAT, p < 0.05 considered to be statistically significant.