放射性肺早期损伤的预防或治疗的实验研究在国内外做的工作都较多,但对减轻晚期损伤方面的工作尚很少见报道。本文用曾在大鼠实验中证实于减轻放射性肺纤维化的中药复方的提取物764-1观察C_3H/HeJ小鼠一次全肺照射后肺晚期改变情况。 C_3H/HeJ小鼠一次全肺照射9、11、13、15Gy。于照射后次日开始腹腔注射764-1每日一次共30天,以 Experimental studies on the prevention or treatment of early radiation-induced lung injury have done more work at home and abroad, but there are few reports on the work on reducing late injury. In this article, we used the extract 764-1 of traditional Chinese medicine compound that has been proved to reduce radiation-induced pulmonary fibrosis in rat experiments to observe late-stage lung changes in C3H/HeJ mice after one-full-lung irradiation. C_3H/HeJ mice were exposed to total lung 9, 11, 13, 15 Gy at a time. On the next day after irradiation, 764-1 was injected intraperitoneally once a day for 30 days.