Table 1 The systematic and random setup errors and setup margins in the lateral (LR), superior-inferior (SI) and anterior-posterior (AP) directions with different correction action levels (CALs)(based on the 75 pre-treatment CBCT data sets).
CAL | LR | SI | AP | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Â | Systematic setup error (mm) | Random setup error (mm) | Margin (mm) | Systematic setup error (mm) | Random setup error (mm) | Margin (mm) | Systematic setup error (mm) | Random setup error (mm) | Margin (mm) |
3 mmCAL | 0.9 | 1.2 | 3.1 | 0.9 | 1.4 | 3.2 | 0.7 | 1.1 | 2.5 |
4 mmCAL | 1.1 | 1.5 | 3.8 | 1.2 | 1.7 | 4.2 | 0.9 | 1.2 | 3.1 |
5 mmCAL | 1.3 | 1.6 | 4.4 | 1.7 | 1.9 | 5.6 | 1.5 | 1.6 | 4.9 |
6 mmCAL | 1.6 | 1.8 | 5.3 | 2.1 | 1.9 | 6.6 | 1.9 | 1.6 | 5.9 |
nocorrection | 2.1 | 1.8 | 6.5 | 3.1 | 2.3 | 9.4 | 2.3 | 2.0 | 7.2 |