| Position shift error (mm) | Gamma passing rate (%) | ||
| H & N | Prostate | ||
| X-axis | 1.0 | 98.6 ± 0.7 | 98.8 ± 1.7 |
| 2.0 | 98.0 ± 1.0 | 98.2 ± 2.0 | |
| 3.0 | 93.4 ± 2.9 | 92.9 ± 3.7 | |
| 4.0 | 64.3 ± 6.7 | 60.8 ± 13 | |
| X-axis | −1.0 | 96.8 ± 1.8 | 98.8 ± 2.0 |
| −2.0 | 91.1 ± 3.1 | 97.1 ± 3.4 | |
| −3.0 | 75.7 ± 3.3 | 84.1 ± 10 | |
| −4.0 | 49.6 ± 2.4 | 53.9 ± 19 | |
| Y-axis | 1.0 | 97.0 ± 1.7 | 99.0 ± 1.7 |
| 2.0 | 92.6 ± 2.6 | 95.5 ± 4.4 | |
| 3.0 | 87.3 ± 3.7 | 87.4 ± 5.7 | |
| 4.0 | 75.0 ± 4.3 | 75.1 ± 11 | |
| Y-axis | −1.0 | 98.5 ± 0.4 | 98.7 ± 1.5 |
| −2.0 | 96.9 ± 0.6 | 96.9 ± 2.5 | |
| −3.0 | 93.6 ± 2.2 | 90.1 ± 5.1 | |
| −4.0 | 81.1 ± 2.3 | 68.7 ± 5.7 | |