| LR | SI | AP |
---|
| Before | After | Before | After | Before | After |
mean
| 0.3 | 0.1 | 0.4 | 0.0 | -0.2 | 0.0 |
SD
| 3.2 | 0.7 | 4.5 | 0.8 | 3.9 | 0.7 |
Range
| -12.0 ~ 13.5 | -2.6 ~ 1.4 | -17.2 ~ 16.3 | -2.5 ~ 1.5 | -12.9 ~ 10.9 | -1.9 ~ 1.5 |
Σ
| 1.4 | 0.2 | 2.1 | 0.2 | 2.3 | 0.1 |
σ
| 3.0 | 0.8 | 4.1 | 0.7 | 3.2 | 0.7 |
Theoretic margin
| 7.4 | 1.7 | 10.2 | 1.6 | 8.8 | 1.7 |
Translational shift
| 4.4 | 7.2 | 5.8 |
- Before: before online set-up correction; After: after online set-up correction; Theoretic margin: calculated by 2.27 × SD based on a pre-selected confidence level of 98%; Translational shift: translational shift of the treatment isocenter in simulated IMRT plan to cover the theoretic margin without online set-up correction in three axes, and calculated as "theoretic margin before online set-up correction-3" mm.