在人类受到的天然放射性辐照中，氡所致人类的照射剂量占５０％左右，而氡及氡子体是诱导肺癌的主要因素之一，因此，近年来环境中氡浓度水平，尤其是室内氡浓度水平受到越来越多的重视。我们于１９９６～１９９８年对东北地区１６个市区室内氡浓度水平进行了系统的调查，现将 Human exposure to natural radioactive radiation caused by human exposure to radon dose of about 50%, and radon and radon progenitor is one of the main factors inducing lung cancer, therefore, the level of radon concentration in the environment in recent years, especially indoor Radon concentration has received more and more attention. We conducted a systematic survey of indoor radon concentration levels in 16 municipalities in Northeast China from 1996 to 1998,