Table 1. Details of the analyzed VMAT plan cases for two years.
| Treatment sites | Total number of cases | Prescription (Gy) | Fraction number (Gy) | MIs | %GP with 2%/1 mm (%) |
|---|---|---|---|---|---|
| Head & Neck | 1 | 24 | 3 | 18.44 | 99.2 |
| C-spine | 6 | 16 ± 5.4 | 1 ± 0.0 | 13.3 ± 3.9 | 94.1 ± 3.2 |
| T-spine | 12 | 19 ± 3.6 | 1.3 ± 1.2 | 10.3 ± 3.6 | 95.3 ± 3.7 |
| Lung | 82 | 57.0 ± 5.7 | 4.0 ± 0.3 | 9.8 ± 2.6 | 97.7 ± 2.4 |
| Liver | 28 | 39.9 ± 9.6 | 3.3 ± 0.4 | 10.5 ± 4.9 | 97.1 ± 1.8 |
| Abdomen | 16 | 34.4 ± 7.0 | 3.3 ± 1.0 | 11.3 ± 8.0 | 97.1 ± 1.6 |
| Pelvis | 9 | 28.3 ± 5.7 | 3.3 ± 2.8 | 11.2 ± 7.5 | 96.2 ± 1.7 |
| L-spine | 12 | 19.3 ± 3.7 | 1.2 ± 0.6 | 12.2 ± 3.5 | 96.0 ± 2.6 |
| Thorax | 2 | 29.5 ± 13.4 | 4.0 ± 1.4 | 22.8 ± 13.4 | 95.8 ± 3.1 |
| Total | 168 | 43.1 ± 16.4 | 3.2 ± 1.3 | 10.7 ± 4.7 | 97.0 ± 2.5 |
Abbreviations: VMAT, volumetric modulated arc therapy; MIs, modulation index evaluating the speed of multi-leaf collimators; %GP with 2%/1 mm, global gamma passing rate with a gamma criterion of 2%/1 mm