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

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)

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)

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)

7.0 (6.2)

5.3 (4.1)

-

6.1² (5.2²)

6.6 (5.5)

6.1 (4.2)

-

6.4² (4.8²)