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Dose volume constraints for organs at risk
| Structure | Dose limits (Gy[RBE]) |
|---|---|
| Esophagus | D33% <65; D67% <55, Dwhole volume ≤45, as low as reasonably achievable |
| Liver | Dwhole volume ≤25; D50% ≤35 |
| Total normal lung | V20 Gy[RBE] <37% is desirable; V20 Gy[RBE] >41% is a major deviation |
| Spinal cord | Dmax ≤50 |
| Heart | D33% ≤60; D67% ≤45; Dwhole volume ≤30, as low as reasonably achievable; V50 <25%; Dmean <20 |
| Skin | Dmax ≤55 (decided by the treating physician) |
