Dosimetric accuracy and clinical quality of Acuros XB and AAA dose calculation algorithm for stereotactic and conventional lung volumetric modulated arc therapy plans

Table 2 Comparison of stage III VMAT and hybrid-VMAT plans

Study	Method	N	D_prescibed[Gy]	V_PTV[cm³]	MLD [Gy]	V_20Gy[%]	V_5Gy[%]	V_5Gy-cont[%]
De Bree-Balk et al. [14]¹	VMAT	20	66	838⁵	20.0	36.6	NA	69.6
Verbakel et al. [15]²	VMAT	14	66	779	NA	30.3 ± 5.7	NA	44.6 ± 9.0
	H-VMAT	14	66	779	NA	30.1 ± 5.8	NA	36.2 ± 15.0
Chan et al. [16]³	VMAT	24	60	508	14.4 ± 2.9	25.4 ± 6.0	64.0 ± 15.4	NA
	H-VMAT	24	60	508	14.0 ± 2.9	23.3 ± 5.3	59.5 ± 16.7	NA
This study⁴	VMAT	73	66	344	12.4 ± 3.5	19.3 ± 6.8	46.6 ± 10.6	35.6 ± 7.1
This study⁴V_PTV > 500 cm³	VMAT	13	66	678	14.5 ± 2.1	22.1 ± 6.4	52.1 ± 10.3	38.7 ± 10.0

Average values and standard deviations are given.
¹[14] Use the volume of both lungs minus CTV for MLD and V_20Gy; PTV V_95% > 99% and PTV V_107% < 1%.
²[15] Use the volume of both lungs minus PTV for V_20Gy; PTV V_95% > 97% and PTV V_107% < 5%.
³[16] Use the volume of both lungs minus PTV for MLD, V_20Gy and V_5Gy; D_98% > 57.0 Gy and D_2% < 64.2 Gy.
⁴ This study uses the volume of both lungs minus ITV for MLD, and volume of both lungs minus PTV for V_20Gy and V_5Gy.
PTV V_90% > 99% and PTV V_110% ≤ 1%.
⁵ Median instead of average value is given.

ISSN: 1748-717X