对于不适宜手术的早期非小细胞肺癌(NSCLC)可选用放射治疗。为确切评价Ⅰ期NSCLC的放疗效果,作者回顾性分析了日本10家大医院1980～1989年间因各种原因不能手术的NSCLC149例,均由CT确定为Ⅰ期。中位年龄74.6(50～89)岁。143例为常规放射治疗,2Gy/次,5次/周,总DT55～74Gy;6例为3Gy/次,3次/周,由TDF公式等效调整其总剂量。83例由于心脏功能差,靶区仅包括原发灶,经肺密度校正后两 Radiotherapy can be used for early non-small cell lung cancer (NSCLC) that is not suitable for surgery. To accurately evaluate the effect of radiotherapy for stage I NSCLC, the author retrospectively analyzed 149 cases of NSCLC that could not be operated for various reasons during the period from 1980 to 1989 in 10 major hospitals in Japan. All of them were identified as stage I by CT. The median age was 74.6 (50 to 89) years old. 143 cases were conventional radiation therapy, 2Gy/time, 5 times/week, total DT55~74Gy; 6 cases were 3Gy/time, 3 times/week, and the total dose was equivalently adjusted by TDF formula. 83 cases due to poor cardiac function, the target area includes only the primary tumor, after lung density correction two