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 |