| Definitions of Constraints | Site/OAR | Ideal dose-volume constraints | Acceptable dose-volume constraints |
| Targets | Chestwall/whole breast | D95% ≥ 47.5 Gy | D90% ≥ 45.0 Gy |
|
| Axillary Lymph Node | D95% ≥ 45.6 Gy | D90% ≥ 43.0 Gy |
|
| Supraclavicular Lymph Node | D95% ≥ 45.6 Gy | D90% ≥ 43.0 Gy |
|
| Internal Mammary Lymph Nodes | D90% ≥ 42.0 Gy | D90% ≥ 38.0 Gy |
| Organs at Risk (OAR) | Ipsilateral Lung | V20 ≤ 25% | V20 ≤ 30% |
|
| Heart | V25 ≤ 5% | V25 ≤ 9% |