Conibear S A
Health Phys. 1983;44 Suppl 1:231-7. doi: 10.1097/00004032-198306001-00020.
Two hundred seventy-three men exposed to thorium and other rare earths between 1940 and 1973 at a plant which refined monazite sand were studied at Argonne National Laboratory from 1976 to 1980. In vivo measurements of body burden were made by counting gamma rays emitted by daughter products of retained thorium and by measuring exhaled thoron. Health status was ascertained through questionnaire, physical examination, and clinical laboratory tests. Measured body burden was found to be higher in those with a history of longer exposure. All parameters of the complete blood count were examined for evidence of an effect due to thorium. Comparisons of high and low body burden groups showed that only age and cigarette smoking had an effect on complete blood count parameters.
1976年至1980年期间，阿贡国家实验室对1940年至1973年在一家提炼独居石砂的工厂接触钍和其他稀土元素的273名男性进行了研究。通过对体内留存钍的子产物发射的伽马射线进行计数以及测量呼出的钍射气，对体内负荷进行了测量。通过问卷调查、体格检查和临床实验室测试确定健康状况。结果发现，接触时间较长者的测量体内负荷较高。对全血细胞计数的所有参数进行了检查，以寻找钍产生影响的证据。高体内负荷组和低体内负荷组的比较表明，只有年龄和吸烟对全血细胞计数参数有影响。
