Table 4.
Required setup margins (mm) for the presented weekly IGRT protocol in different directions with the action level of 4 mm for position errors of the subregions
| Structure |
MID_PTV |
MIN_MAX |
||||||
|---|---|---|---|---|---|---|---|---|
| AP/ vertical | CC/ longitudinal | LAT/ lateral | Mean 3D | AP/ vertical | CC/ longitudinal | LAT/ lateral | Mean 3D | |
| C1-21 |
6.0 (5.1) |
4.6 (3.1) |
5.5 (4.7) |
5.4 (4.3) |
6.0 (4.7) |
5.7 (3.6) |
5.0 (4.2) |
5.6 (4.2) |
| C5-71 |
5.4 (4.3) |
5.0 (3.7) |
4.9 (4.1) |
5.1 (4.0) |
6.5 (5.3) |
5.9 (3.8) |
4.7 (3.8) |
5.7 (4.3) |
| Mandible1 |
6.1 (5.2) |
5.8 (4.7) |
5.2 (4.4) |
5.7 (4.8) |
5.9 (4.5) |
6.3 (4.5) |
5.1 (4.3) |
5.7 (4.4) |
| Occiput bone1 | 7.0 (6.2) | 5.3 (4.1) | - | 6.12 (5.22) | 6.6 (5.5) | 6.1 (4.2) | - | 6.42 (4.82) |
1includes observer errors, 22D margins for the occiput bone.
The results for daily IGRT are given in parenthesis.