Table 3.

Comparisons of average MCS, AA, total MUs, and gamma passing rates between the PRO and PO plans for SBRT and SRS treatments

SBRT					SRS
Rx	54 Gy/3Fx		50 Gy/5Fx		Rx	25 Gy/5Fx
Algorithm	PRO	PO	PRO	PO	Algorithm	PRO	PO
MCS	0.38 ± 0.08	0.51 ± 0.04	0.34 ± 0.08	0.51 ± 0.08	MCS	0.28 ± 0.07	0.38 ± 0.05
AA	927 ± 371	1184 ± 361	849 ± 375	1254 ± 469	AA	379 ± 143	507 ± 184
Total MU	5723 ± 1045	4151 ± 475	3388 ± 574	2241 ± 453	Total MU	1820 ± 600	1304 ± 473
γ(3%/3 mm)	97.9 ± 1.5	99.2 ± 1.2	96.1 ± 2.4	99.1 ± 1.0	γ(5%/1 mm)	96.1 ± 3.4	98.4 ± 2.0
γ(2%/2 mm)	94.8 ± 2.8	97.7 ± 1.2	91.1 ± 3.2	96.0 ± 2.2	γ(3%/1 mm)	90.6 ± 5.1	95.7 ± 4.6