Table 1.
The dose constraints for postmastectomy radiotherapy (PMRT) patients with irradiated planning target volume (PTV) chest wall (CW) and chest wall plus regional nodes (CW + RN).
| Structure | Chest wall only irradiation | Chest wall + regional nodes irradiation | ||
|---|---|---|---|---|
| Dose (Gy) | Volume (%) | Dose (Gy) | Volume (%) | |
| PTV (CW, CW + RN) | <53.5 | 2 | <53.5 | 2 |
| 50 | 50 | 50 | 50 | |
| >47.5 | 95 | >47.5 | 95 | |
| Ipsilateral lung | 20 | 20 | 20 | 30 |
| 30 | 20 | |||
| Contralateral lung | 5 | 10 | 5 | 20 |
| Contralateral breast | 5 | 10 | 5 | 10 |
| 8 | 2 | 8 | 2 | |
| Heart | 20 | 15 | 20 | 15 |
| 10 | 20 | 10 | 20 | |
| Heart (mean dose) | 8 | 8 | ||
| Spinal cord | 20 | 2 | 20 | 2 |
| Left anterior descending artery (LAD) | 50 | 2 | 50 | 2 |
| Esophagus | 52.5 | 2 | 52.5 | 2 |