Table 2.
Setup results, required setup margins and estimated number of setup corrections.
| EPID | CBCT | CBCT (original clipbox) |
CBCT (extended clipbox) |
CBCT (mask = PTV+1 cm) |
|||||
|---|---|---|---|---|---|---|---|---|---|
| Bone match | Clinical match | Soft tissue match |
Bone match | Soft tissue match |
Bone match | Soft tissue match |
Bone match | ||
| Group mean [mm] | Lateral (RL) | −0.40 | 0.13 | 0.11 | 0.20 | 0.10 | −0.08 | 0.03 | −0.01 |
| Longitudinal (CC) | −0.03 | 0.33 | 0.27 | 0.28 | 0.01 | 0.33 | 0.58 | 0.46 | |
| Vertical (AP) | 0.33 | 0.28 | 0.25 | 0.31 | 0.15 | 0.33 | 0.03 | −0.11 | |
| Σ [mm] | Lateral | 1.44 | 1.78 | 1.78 | 1.90 | 1.69 | 1.89 | 1.82 | 2.47 |
| Longitudinal | 2.01 | 2.07 | 2.14 | 2.63 | 1.93 | 2.33 | 3.12 | 2.68 | |
| Vertical | 1.49 | 1.42 | 1.46 | 1.64 | 1.88 | 1.73 | 1.77 | 1.51 | |
| σ [mm] | Lateral | 3.47 | 2.03 | 2.04 | 2.10 | 1.97 | 2.05 | 2.11 | 2.27 |
| Longitudinal | 3.97 | 3.38 | 3.38 | 3.40 | 3.21 | 3.34 | 3.53 | 3.09 | |
| Vertical | 2.35 | 1.59 | 1.62 | 1.45 | 1.68 | 1.46 | 1.92 | 1.37 | |
| Setup margin [mm] | Lateral | 6.04 | 5.86 | 5.88 | 6.23 | 5.62 | 6.17 | 6.02 | 7.78 |
| Longitudinal | 7.80 | 7.54 | 7.73 | 8.94 | 7.07 | 8.17 | 10.27 | 8.87 | |
| Vertical | 5.37 | 4.67 | 4.79 | 5.13 | 5.88 | 5.36 | 5.76 | 4.72 | |
| Average number of corrections using offline SAL protocol | 0.75 | 0.36 | 0.38 | 0.69 | 0.49 | 0.56 | 0.64 | 0.71 | |