| Position shift error (mm) | Gamma passing rate (%) | ||
| H & N | Prostate | ||
| X-axis | 1.0 | 96.5 ± 1.1 | 99.4 ± 0.7 |
| 2.0 | 96.3 ± 1.7 | 99.1 ± 1.0 | |
| 3.0 | 92.7 ± 1.9 | 97.9 ± 1.5 | |
| 4.0 | 70.1 ± 5.2 | 71.3 ± 13.4 | |
| X-axis | −1.0 | 94.5 ± 2.0 | 99.1 ± 0.9 |
| −2.0 | 86.1 ± 2.3 | 94.2 ± 3.4 | |
| −3.0 | 73.0 ± 4.7 | 76.5 ± 12.4 | |
| −4.0 | 55.9 ± 9.0 | 60.4 ± 17.6 | |
| Y-axis | 1.0 | 94.9 ± 1.9 | 98.9 ± 1.0 |
| 2.0 | 87.8 ± 3.4 | 94.2 ± 3.5 | |
| 3.0 | 82.3 ± 3.2 | 83.8 ± 4.6 | |
| 4.0 | 74.3 ± 5.9 | 70.6 ± 4.6 | |
| Y-axis | −1.0 | 96.9 ± 1.4 | 99.4 ± 0.7 |
| −2.0 | 96.6 ± 1.5 | 99.3 ± 0.9 | |
| −3.0 | 95.2 ± 1.9 | 98.4 ± 0.6 | |
| −4.0 | 83.8 ± 4.3 | 80.5 ± 2.5 | |