Prediction of VMAT delivery accuracy with textural features calculated from fluence maps

Radiation Oncology

Table 4 Differences in mechanical parameters between machine log files and original volumetric modulated arc therapy (VMAT) plans

Treatment site	MLC error (mm)	Gantry angle error (°)	Monitor unit error (MU)
Trilogy
H&N	0.188 ± 0.065	0.054 ± 0.002	0.104 ± 0.072
Prostate (PP)	0.043 ± 0.082	0.053 ± 0.004	0.061 ± 0.021
Prostate (BP)	0.027 ± 0.011	0.054 ± 0.002	0.055 ± 0.011
Liver	0.122 ± 0.098	0.054 ± 0.002	0.076 ± 0.037
Spine	0.073 ± 0.061	0.054 ± 0.001	0.124 ± 0.042
TrueBeam STx
H&N	0.090 ± 0.012	0.029 ± 0.000	0.017 ± 0.005
Brain	0.040 ± 0.022	0.029 ± 0.002	0.052 ± 0.041
Lung (SABR)	0.011 ± 0.006	0.010 ± 0.001	0.396 ± 0.033
Spine (SABR)	0.024 ± 0.011	0.025 ± 0.003	0.257 ± 0.088
Liver (SABR)	0.029 ± 0.018	0.037 ± 0.025	0.189 ± 0.106

MLC Multi-leaf collimator, H&N head and neck, PP primary plan, BP boost plan, SABR stereotactic ablative radiotherapy

ISSN: 1748-717X