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| An Investigation on the Possible Threshold between the Inhaled Thorium Dusts and Its Effects on Hepatic Functions of the Miners |
| CHENG Yong-e1, CHEN Xing-an1,2, ZHANG Gui-qing2, et al |
| National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention, Beijin 100088 China |
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Abstract Objective To investigate the possible threshold between the thorium lung burden and the five hepatic parameters of the miners with long-term inhaled thorium containing ore dusts.Method By using high sensitive negative voltage exhaled thoron progeny collection and measurement system, the thorium lung burdens of each dust exposed miner was obtained.Results Our results showed that whenever the thorium lung burden is below 7.26Bq, the miner's five hepatic parameters would be normal range.Conclusion By our own results and the data from literatures.The possible threshold existing between the thorium lung burden and its effects on five hepatic parameters will be from 7.26Bq~74Bq.
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Received: 29 November 2006
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