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Table 2 The mechanical accuracies of gantry angle, couch angle, MLC position, and MU. The mean absolute errors ±2 standard deviations for the C-shaped phantom and the prostate cancers are shown

From: Quality assurance of non-coplanar, volumetric-modulated arc therapy employing a C-arm linear accelerator, featuring continuous patient couch rotation

Trajectory C-shaped phantom Prostate cancers (n = 5)
Gantry [°] Couch [°] MLC [mm] Beam output [MU] Gantry [°] Couch [°] MLC [mm] Beam output [MU]
1 0.04 ± 0.01 0.01 ± 0.01 0.03 ± 0.04 0.01 ± 0.02 0.04 ± 0.03 0.04 ± 0.02 0.02 ± 0.03 0.01 ± 0.01
2 0.04 ± 0.02 0.03 ± 0.06 0.03 ± 0.05 0.01 ± 0.02 0.04 ± 0.04 0.05 ± 0.08 0.02 ± 0.03 0.01 ± 0.02
3 0.04 ± 0.02 0.04 ± 0.09 0.03 ± 0.05 0.01 ± 0.01 0.04 ± 0.02 0.03 ± 0.06 0.02 ± 0.03 0.01 ± 0.01
4 0.04 ± 0.01 0.03 ± 0.03 0.03 ± 0.04 0.01 ± 0.02 0.04 ± 0.03 0.07 ± 0.05 0.02 ± 0.04 0.01 ± 0.01
5 0.04 ± 0.02 0.04 ± 0.08 0.03 ± 0.05 0.01 ± 0.01 0.04 ± 0.04 0.06 ± 0.09 0.02 ± 0.03 0.01 ± 0.01
6 0.04 ± 0.01 0.02 ± 0.01 0.02 ± 0.03 0.01 ± 0.02 0.04 ± 0.03 0.08 ± 0.03 0.02 ± 0.04 0.01 ± 0.01
7 0.04 ± 0.02 0.04 ± 0.01 0.03 ± 0.04 0.01 ± 0.02 0.04 ± 0.03 0.06 ± 0.02 0.02 ± 0.04 0.01 ± 0.01
  1. Abbreviations: CCR-VMAT non-coplanar, volumetric-modulated arc therapy featuring continuous couch rotation, MLC multi-leaf collimator, MU monitor units