Table 2.
Summary of inter-fraction and intra-fraction translational error and rotational error in each dimension
|
Translational error (mm) | |||||||||
|---|---|---|---|---|---|---|---|---|---|
|
Initial inter-fraction error |
Residual inter-fraction error |
Intra-fraction error |
|||||||
| ML | SI | AP | ML | SI | AP | ML | SI | AP | |
| M |
−0.3 |
−0.9 |
0.8 |
0 |
−0.4 |
0.2 |
0 |
−0.2 |
−0.3 |
| SD |
1.5 |
1.3 |
1.2 |
0.7 |
0.8 |
0.8 |
0.5 |
0.7 |
0.7 |
| Minimum |
−5.2 |
−4.8 |
−2.9 |
−2.0 |
−2.0 |
−1.9 |
−1.5 |
−2.4 |
−2.8 |
| Maximum |
5.0 |
2.0 |
4.2 |
1.8 |
2.0 |
2.0 |
2.1 |
1.8 |
0.7 |
| Σ |
1.4 |
1.0 |
1.0 |
0.4 |
0.5 |
0.4 |
0.2 |
0.4 |
0.4 |
| σ |
0.8 |
0.8 |
0.7 |
0.6 |
0.7 |
0.7 |
0.5 |
0.6 |
0.6 |
| Rotational error (°) | |||||||||
| |
Initial inter-fraction error |
Residual inter-fraction error |
Intra-fraction error |
||||||
| pitch |
roll |
yaw |
pitch |
roll |
yaw |
pitch |
roll |
yaw |
|
| M |
−0.7 |
−0.2 |
−0.2 |
−0.7 |
−0.1 |
−0.1 |
−0.1 |
0.1 |
0 |
| SD |
0.9 |
1.4 |
1.0 |
0.9 |
1.4 |
0.9 |
0.5 |
0.5 |
0.4 |
| Minimum |
−3.5 |
−4.4 |
−4.0 |
−3.0 |
−3.0 |
−3.0 |
−2.8 |
−1.2 |
−1.5 |
| Maximum |
2.1 |
2.9 |
2.8 |
1.8 |
2.9 |
2.7 |
1.4 |
1.5 |
0.9 |
| Σ |
0.7 |
1.0 |
0.7 |
0.7 |
1.0 |
0.6 |
0.3 |
0.2 |
0.2 |
| σ | 0.6 | 1.0 | 0.7 | 0.6 | 1.0 | 0.7 | 0.5 | 0.5 | 0.4 |
M, mean of all patients’ mean; SD, standard deviation; Σ, systematic setup uncertainty; σ, random setup uncertainty; ML, medial–lateral; SI, superior–inferior; AP, anterior–posterior.