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作者报告了阳江天然放射性高本底地区环境辐射水平的测量和居民吸收剂量估算方面近几年的调查结果。根据辐射流行病学调查的需要，将高本底地区因外照射所致居民的年吸收剂量，按村庄平均分成高、中、低３个组。对照地区将根据分组人数的配对要求，仅在以前调查过的对照地区选部分村庄。高本底地区有３８４个村庄，对照地区有１４２个村庄。现阶段调查的目的是要给出调查地区每个人员的个人累积剂量。为此，自１９９１年以来，已连续４次开展了个人和环境中的累积剂量调查。回收并能提供实际测量值的人数，高本底地区和对照地区分别为３９００人和１３０４人，他们的平均年个人累积剂量分别是２１０．９８×１０￣（－５）Ｇｙ·ａ￣（－１）和７０．１７×１０￣（－５）Ｇｙ·ａ￣（－１）。高本底地区的女性吸收剂量稍比男性高（Ｐ＝０．１８），０～７岁组的年吸收剂量明显高于其他四个年龄组（Ｐ＜０．０５），４１～６０岁年龄组低于其他４个年龄组（Ｐ＜０．０５），而８～１６，１７～４０和６０岁以上年龄组间差异无显著性（Ｐ＞０．０５）。对照地区的性别和各年龄组之间均无明显差异（Ｐ＞０．０５）。高本底地区的居民以居住在砖瓦结构房屋的个人剂量非常明显高于居住在其他建筑材料类型的?
The authors report on the survey of environmental radiation levels and estimates of inhaled dose of natural high background radiation in Yangjiang in recent years. According to the needs of radiation epidemiological survey, the inhabitants’ annual absorbed dose due to external radiation in the high background area is divided into three groups of high, medium and low according to the village average. In the control area, some villages will be selected only in the control areas previously surveyed, based on the matching requirements of the number of groups. There are 384 villages in the high background area and 142 in the comparison area. The purpose of the investigation at this stage is to give a personal cumulative dose for each person in the surveyed area. To this end, cumulative dose surveys in individuals and the environment have been conducted four times in a row since 1991. The average number of individuals recovered and able to provide actual measurements was 3,900 and 1,304 in the high background area and the control area respectively. Their average annual cumulative individual doses were 210.98 × 10 -5 Gy · a ~ (- 1) and 70.17 × 10 ~ (-5) Gy · a ~ (-1). The absorbed dose of female in high background area was slightly higher than that of male (P = 0.18), and the annual absorbed dose in 0-7 years old group was significantly higher than the other four age groups (P <0.05) Group was lower than the other four age groups (P <0.05), while there was no significant difference between 8-16, 17-40 and 60 years old (P> 0.05). There was no significant difference between sex and age groups in the control area (P> 0.05). Individuals living in brick-and-mortar houses in very high background areas have significantly higher individual doses than those living in other types of building materials?