Table 2: Percentage of γ < 2%/2 mm within the 50% and 90% isodose volume regarding target size for one-arc, half-arc and two-arc VMAT plans of six patients.

Patient Target size (cm3) γ < 2%/2 mm
[metal implant size (cm3)] one-arc half-arc two-arc
50% 90% 50% 90% 50% 90%
Patient 1 [4.8] 160.80 99.13 99.17 97.75 97.63 99.33 99.37
121.50 99.73 97.73 98.78 98.28 98.79 98.59
39.10 99.71 97.34 98.55 97.10 98.88 98.73
16.90 99.26 90.72 96.07 84.80 97.53 93.87
Patient 2 [2.6] 82.46 97.95 96.25 97.48 93.93 99.09 98.75
60.13 98.34 97.18 98.33 96.79 98.83 98.04
27.40 98.26 96.32 97.10 92.73 98.71 97.52
17.78 97.60 94.66 97.31 94.08 98.67 97.38
Patient 3 [0.6] 85.09 99.27 99.56 99.14 99.36 99.26 99.56
49.41 99.28 99.36 99.32 99.21 99.44 99.56
29.50 99.48 99.60 99.18 99.25 99.32 99.39
Patient 4 [2.9] 55.08 99.11 98.98 99.28 99.23 99.40 99.46
37.45 98.65 97.83 98.42 97.05 99.25 99.09
18.50 98.89 98.59 98.70 97.46 99.14 98.97
Patient 5 [4.6] 66.77 96.93 95.75 94.18 88.60 97.64 97.27
51.77 97.07 95.84 94.98 91.19 97.30 96.54
24.12 96.74 94.54 96.92 94.14 97.57 97.57
Patient 6 [0.9] 63.40 97.78 97.56 97.59 97.45 99.10 99.17
45.65 98.62 97.92 97.33 98.19 99.07 99.06
22.37 98.13 96.98 97.41 96.21 98.99 99.07