Radon is the leading source of lung cancer mortality after smoking in Chiang Mai, Thailand. Finding a source of carcinogens is one of the important measures for preventing the cancer risk for this region. Specific sites at Pa Miang, Doi Saket have the highest incidences of lung cancer and have a combination of factors that influence indoor radon concentration. Our study identified the sources of indoor radon within several houses. The results indicate that geological and topographic characteristics, including active faults and mountain terraces, are the main sources of indoor radon, especially for wooden houses. Besides building materials, the design of the houses, ventilation conditions, and lifestyle choices are all factors influencing indoor radon concentrations and its associated risk. Although radon levels (29-101 Bq m-3) and total indoor annual effective doses (0.9-3.8 mSv year-1) received from all sources at these sites have shown no significant health risk due to radon exposure , this investigation will be useful as a starting point to guide strategies to respond and prevent the risk of lung cancer, especially in Chiang Mai.

译文

氡是泰国清迈吸烟后肺癌死亡的主要来源。寻找致癌物的来源是预防该地区癌症风险的重要措施之一。在Pa Miang,Doi Saket的特定部位具有最高的肺癌发病率,并且具有影响室内ra浓度的多种因素。我们的研究确定了几所房屋内室内ra的来源。结果表明,地质和地形特征 (包括活动断层和山地阶地) 是室内ra的主要来源,尤其是木屋。除建筑材料外,房屋的设计,通风条件和生活方式的选择都是影响室内ra浓度及其相关风险的因素。尽管从这些地点的所有来源获得的ra水平 (29-101 Bq m-3) 和室内年度总有效剂量 (0.9-3.8 mSv year-1) 没有显示出由于ra暴露而导致的重大健康风险,这项调查将作为指导应对和预防肺癌风险的策略的起点,尤其是在清迈。

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