Dose-volume Predictors of Radiation Pneumonitis Following Thoracic Hypofractionated Radiotherapy

To minimize the risk of grade ≥2 radiation pneumonitis when delivering 4 Gy per fraction at either 60 Gy or 72 Gy, it is advisable to maintain lung V20<17.7%. MLD<10.6 Gy and V5<41.3% can also be considered as lower-priority constraints. However, further validation is necessary before incorporating these constraints into clinical practice or trial planning guidelines.