Table 2.
Dosimetric parameters of targets and OARs
| Variable | Value, median (range), % |
|---|---|
| Breast PTVeval | |
| V95 | 98.9 (95.2-99.9) |
| V105 | 7.6 (0-26.1) |
| Boost PTVeval∗ | |
| V95 | 100 (98.6-100) |
| V105 | 3.6 (0-27.3) |
| Chest wall PTVeval | |
| V95 | 97.5 (96.3-98.7) |
| V105 | 8.2 (7.4-8.9) |
| Heart (all patients) | |
| V5 | 2.2 (0-85.6) |
| V10 | 0.2 (0-14.6) |
| V20 | 0 (0-5.2) |
| Mean, Gy | 1.38 (0.66-5.69) |
| Heart (Left-sided-only treatments) | |
| V5 | 3.4 (0.4-55.9) |
| V10 | 1.1 (0-14.6) |
| V20 | 0.3 (0-5.2) |
| Mean, Gy | 1.87 (1.21-5.69) |
| Heart (Right-sided-only treatments) | |
| V5 | 0 (0-15.0) |
| V10 | 0 (0-1.3) |
| V20 | 0 (0-0) |
| Mean, Gy | 1.12 (0.66-1.72) |
| Heart (Bilateral treatments) | |
| V5 | 6.0 (3.1-85.6) |
| V10 | 0.6 (0.1-9.4) |
| V20 | 0.1 (0-1.3) |
| Mean, Gy | 3.09 (2.96-3.59) |
| Heart (MV CBCT-only patients) | |
| V5 | 2.5 (0-85.6) |
| V10 | 0.1 (0-14.6) |
| V20 | 0 (0-5.2) |
| Mean, Gy | 1.60 (0.78-5.69) |
| Heart (kV CBCT-only patients) | |
| V5 | 0.4 (0-3.4) |
| V10 | 0 (0-2.0) |
| V20 | 0 (0-1.4) |
| Mean, Gy | 1.21 (0.66-1.97) |
| Ipsilateral lung | |
| V5 | 32.9 (0-85.0) |
| V10 | 16.9 (0-48.8) |
| V20 | 13.3 (0-35.6) |
| Mean, Gy | 7.19 (0.75-18.70) |
Abbreviations: CBCT = cone beam computed tomography; OAR = organ at risk; PTVeval = planning target volume for evaluation.
∗
Non–6-MV flattening-filter-free O-ring linear accelerator boosts excluded.