Table 2 Set-up margins (mm) for each scenario using the van Herk formula [3]
From: Impact of the frequency of online verifications on the patient set-up accuracy and set-up margins
| Â | Â | Safety Margin* | ||
|---|---|---|---|---|
Anatomical region | FOV | AP | Lateral | SI |
Head and Neck | 0% | 3 | 4 | 5 |
Chest | 0% | 7 | 7 | 5 |
Abdomen | 0% | 9 | 8 | 11 |
Pelvis | 0% | 8 | 6 | 9 |
Head and Neck | 20% | 2 | 3 | 3 |
Chest | 20% | 5 | 5 | 4 |
Abdomen | 20% | 7 | 5 | 8 |
Pelvis | 20% | 6 | 5 | 7 |
Head and Neck | 50% | 1 | 2 | 2 |
Chest | 50% | 3 | 3 | 2 |
Abdomen | 50% | 5 | 4 | 6 |
Pelvis | 50% | 4 | 3 | 4 |