Table 1.
Median values of the OVS between CBCT-CT and the RVS for the extremities, for each isocenter position. IQR values are reported in parentheses.
| Isocenter Position | OVS [mm] |
Left Extremity RVS [mm] |
Right Extremity RVS [mm] |
|---|---|---|---|
| Head | 3.8 (2.3, 5.1) |
- | - |
| Shoulders | 2.8 (1.6, 4.2) |
2.9 (0, 6.2) |
5.1 (0, 8.0) |
| Abdomen/Arms | 4.7 (3.0, 6.4) |
7.0 (4.5, 10.0) |
7.3 (3.3, 9.8) |
| Hip | 4.1 (2.5, 6.4) |
3.8 (0, 8.9) |
5.1 (1.2, 8.9) |
| Legs | 4.1 (2.4, 6.3) |
2.0 (0, 5.8) |
2.1 (0, 6.0) |
| Feet | 4.4 (2.6, 6.4) |
7.5 (3.0, 11.0) |
7.5 (3.6, 10.4) |
| Total | 4.0 (2.4, 6.0) |
4.8 (0, 8.0) |
5.1 (0, 8.4) |
Legend: OVS = online vector shift; RVS = residual vector shift.