Table 3.
A comparison of the AUC values for various gamma criteria for different QA devices
| AUC [standard error, 95% confidence interval] | ||||||
|---|---|---|---|---|---|---|
| Treatment | QA device | Method | Acceptance criteria | |||
| 3%/3 mm | 3%/2 mm | 3%/1 mm | 2%/2 mm | |||
| IMRT | EPID | Absolute gamma analysis |
0.930 [0.016, 0.898–0.962] |
0.952 [0.013, 0.927–0.978] |
0.992 [0.005, 0.982–1] |
0.950 [0.014, 0.923–0.977] |
| VMAT | EPID | Absolute gamma analysis |
0.958 [0.031, 0.897–1] |
0.965 [0.036, 0.895–1] |
0.970 [0.031, 0.910–1] |
0.933 [0.065, 0.805–1] |
| VMAT | EPID | Relative gamma analysis |
0.629 [0.101, 0.431–0.826] |
0.740 [0.078, 0.588–0.892] |
0.966 [0.022, 0.923–1] |
0.766 [0.074, 0.620–0.912] |
| IMRT | MapCheck2 | Absolute gamma analysis |
0.590 [0.042, 0.505–0.667] |
0.610 [0.039, 0.532–0.686] |
0.669 [0.040, 0.589–0.745] |
0.723 [0.035, 0.655–0.792] |
| VMAT | ArcCheck | Absolute gamma analysis |
0.694 [0.105, 0.442–0.853] |
0.701 [0.105, 0.448–0.860] |
0.735 [0.106, 0.476–0.892] |
0.722 [0.101, 0.473–0.867] |