A 20-year follow-up study on the effects of long-term exposure to thorium dust
  • 万方数据
    中华医学杂志(英文版) 중화의학잡지(영문판)
    CHINESE MEDICAL JOURNAL
    2003年 5期 692-694 ,共3页

    陈兴安%程永娥%肖慧娟%冯国栋%邓芸辉%冯志良%陈莲%韩轩茂%杨英杰%董智华%甄荣

    진흥안%정영아%초혜연%풍국동%산예휘%풍지량%진련%한헌무%양영걸%동지화%견영



    thorium%thoron progeny%lung cancer


    Objective The purpose of this study is to investigate the possible effects of long-term exposure to dust containing thorium and thoron progeny dust-exposed miners. Methods A negative, high voltage, exhaled thoron progeny measurement system was used to estimate the miners' thorium lung burden. Results The highest thorium lung burden of 638 miners was 11.11 Bq. The incidence of stage 0+ pneumoconiosis was higher among dust-exposed miners. Lung cancer mortality of the dust-exposed miners was significantly higher than that of controls (P<0.005). Conclusion There is a difference in cancer rates between those who have long-term exposure to dust containing thorium (in which carcinogenic ThO2 and SiO2 exist) and thoron progeny and those who have not.
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