Table 3 Target coverage in the C6-C7 region
| Â | IMRT | VMAT | ||||
|---|---|---|---|---|---|---|
| Â | 100% | 98% | 95% | 100% | 98% | 95% |
C6-C7 | Â | Â | Â | Â | Â | Â |
   No shift | 97 | 98 | 100 | 94 | 97 | 99 |
   5 mm superior | 90 | 98 | 100 | 84 | 96 | 99 |
   15 mm superior | 23 | 53 | 94 | 16 | 35 | 72 |
C7-T2 | Â | Â | Â | Â | Â | Â |
   No shift | 98 | 100 | 100 | -- | -- | -- |
   15 mm posterior | 89 | 99 | 100 | -- | -- | -- |