Table 1.
Error components for the presented setup correction protocol in different directions (mm)
| Structure |
Systematic error Σ (1 SD) |
Random error σ (1 SD) |
||||
|---|---|---|---|---|---|---|
| AP/ vertical | CC/ longitudinal | LAT/ lateral | AP/ vertical | CC/ longitudinal | LAT/ lateral | |
| Rigid target1 |
0.8 (1.1) |
0.9 (1.3) |
0.7 (0.7) |
1.7 (1.3) |
1.6 (1.6) |
1.6 (1.2) |
| Observer variation |
0.9 (1.0) |
0.8 (1.0) |
0.9 (0.9) |
1.4 (1.4) |
1.5 (1.6) |
1.6 (1.6) |
| C1-22 |
2.0 (1.6) |
1.0 (1.4) |
1.6 (1.3) |
1.8 (1.4) |
1.3 (1.6) |
1.6 (1.5) |
| C5-72 |
1.5 (1.8) |
1.0 (1.5) |
1.2 (1.2) |
1.4 (1.6) |
1.8 (1.9) |
1.7 (1.6) |
| Mandible2 |
2.9 (1.5) |
2.7 (1.5) |
1.6 (1.3) |
2.3 (1.7) |
2.4 (1.9) |
1.9 (1.6) |
| Occiput bone2 | 2.4 (2.2) | 1.5 (2.0) | - | 2.3 (1.9) | 1.9 (1.7) | - |
1Errors of the reference location for weekly IGRT without observer related variation.
2Errors with daily imaging including observer errors.
The results are given for the two matching principles as MID_PTV (MIN_MAX).