【Key words】 Radiotherapy; Pulmonary function testing; Forced expiratory volume in the first second as percentage of predicted value; Percentage of forced expiratory volume in the first second to forced vital capacity; Carbon monoxide diffusing capacity as percentage of predicted value; Non-small cell lung cancer; Radiation pneumonia; Predictive value

    随着我国老年人口数量的不断增加， 老年肺癌的发生率逐年增加， 已经成为当前严重威胁人类身体健康和生命安全的全球性恶性肿瘤， 其中非小细胞肺癌在肺癌中所占的比例达到80% ......