Table 3.
Doses to normal tissues
| VMAT | HT | |
| Ipsilateral lung | ||
| V5 | 85.3% ± 9.6% | 78.5% ± 12.6% |
| V20 | 20.1% ± 3.2% | 21.1% ± 5% |
| V30 | 8.8% ± 3.2% | 10.1 ± 3.3 |
| Mean dose | 13.6 ± 1.4 Gy | 13.6 ± 1.2 Gy |
| Controlateral lung | ||
| V5 | 46% ± 14.1% | 35.4 ± 11.3 |
| V20 | 0.7% ± 0.5% | 0.1 ± 0.2 |
| Mean dose | 5.4 ± 1 Gy | 4.6 ± 0.8 Gy |
| Heart | ||
| Mean dose | 10.3 ± 4.2 Gy | 7.5 ± 1.4 Gy |
| V5 | 77.6% ± 21% | 59.8 % ± 14.6% |
| V30 | 2.5% ± 3.9% | 1% ± 1% |
| Controlateral breast | ||
| Mean dose | 4.6 ± 0.9 Gy | 3.6 ± 0.6 Gy |
| V5 | 32% ± 11.9% | 14.7% ± 7% |
| Spinal cord | ||
| V40 | 0 mm3 | 0 mm3 |
| V5 | 22.4 ± 8.8 mm3 | 25.2 ± 9 mm3 |
| Oesophagus | ||
| V45 | 0.4 ± 0.6 mm3 | 1 ± 1.2 mm3 |
| V10 | 8.8 ± 5.4 mm3 | 12.8 ± 5.7 mm3 |
| Thyroid | ||
| Mean dose | 28.3 ± 7 Gy | 26.7 ± 7.7 Gy |
| V30 | 44% ± 15.3% | 39.8% ± 17.6% |
| V5 | 97.1% ± 8.3% | 96% ± 9.4% |
| Unspecified tissues | ||
| V40 | 1977 ± 911 mm3 | 1880.9 ± 754 |
| V5 | 9770.3 ± 2551 mm3 | 8566.6 ± 1946.2 |
VMAT: Volumetric modulated arc therapy; HT: Helical tomotherapy.