放射性肺损伤是胸部肿瘤放射治疗的常见并发症之一,由放射性肺炎和放射性肺纤维化两部分组成。放射性肺炎一般属于急性反应,常发生在放疗后1～3个月。主要表现为干咳、程度不一的呼吸困难,有时有发热,影像学表现为放射区的不均匀密度增高及纵隔密度增高。放射区外也有密度改变, Radiation lung injury is one of the common complications of radiation therapy of thoracic tumors, which is composed of two parts: radiation pneumonitis and radiation pulmonary fibrosis. Radiation pneumonia is generally an acute reaction, often occurs in 1 to 3 months after radiotherapy. Mainly manifested as dry cough, varying degrees of breathing difficulties, and sometimes fever, radiological manifestations of uneven radiation density increased density and mediastinal density. Radiation outside the area also have a density change,