Table 1 Positioning deviations of isocenter relocation at CT verification before and during radiation treatment.
| Â | pre-treatment | 2 weeks | 4 weeks | end of treatment |
|---|---|---|---|---|
Direction (mm) | mean (SD) | mean (SD) | mean (SD) | mean (SD) |
Craniocaudal | 0.3 (0.4) | 0.3 (0.5) | 0.3 (0.6) | 0.4 (0.5) |
Mediolateral | 0.1 (0.3) | 0.1 (0.4) | 0.2 (0.4) | 0.2 (0.4) |
Anteroposterior | 0.1 (0.4) | 0.2 (0.4) | 0.2 (0.4) | 0.2 (0.5) |
3D-displacement | 0.5 (0.4) | 0.5 (0.4) | 0.6 (0.4) | 0.6 (0.5) |