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加拿大国家剂量登记处成立于 １９５０ 年，目前有来自２４ ０００ 多个机构的超过５００ ０００ 人的包括 Ｘ 射线、γ射线、中子、β粒子、体内氚及氡子体的监测记录。方法：从 １９５１ 年１ 月 １ 日至１９８３ 年１２ 月 ３１ 日的 登记者中， 选择 记录齐 全的 ２０６ ６２０ 人（男１０５ ４５６ 人，女 １０１ １６４ 人），对其受照剂量与死亡资料作了统计分析。该人群按其职业分为４ 类：牙科工作者（占 ２１％ ）、其他医学工作者（占 ３５％ ）、工业部门工人（占 ３８％ ）及核电站工人（占 ６％ ）。以热释光剂量系统监测外照射剂量，剂量在 ０２ｍ Ｓｖ 以下者计为零。核电站报告的中子剂量的相对生物效应取为１０。通过尿样分析氚的照射并换算为以ｍ Ｓｖ 表示的剂量当量。死亡信息来自加拿大死亡资料库。对该群体随访至 １９８７ 年，平均随访 １４ 年。结果：在１９５１～１９８７ 年随访期间，共有５ ４２６ 人（男４ ２１０ 人，女 １ ２１６ 人）死亡。终生累积全身受照剂量较低：１７７ ７０３ 人在０～４９ｍ Ｓｖ，其中 ９３ ２６０ 人在 ０２ｍ Ｓｖ 以 下， 仅 １４％ 的人 累 积 剂 量 超 过１００ｍ Ｓｖ。所有成员平均剂量为 ６３ｍ Ｓｖ，而男性平均为 ?
The National Dose Register of Canada was established in 1950 and there are currently over 500,000 monitoring records from more than 24 000 agencies including X-rays, gamma rays, neutrons, beta particles, tritium and radon in vivo. Methods: From January 1, 1951 to December 31, 1983, 206,620 people (105,456 men and 101,161 women) were selected and the data of their doses and deaths were recorded Statistical Analysis. The population is divided into four categories according to their occupation: dental workers (21%), other medical workers (35%), industrial sector workers (38%) and nuclear power station workers (6%). The external exposure dose was monitored with a thermoluminescent dose system, with a dose of 0 2mSv below zero. The relative biological effect of neutron doses reported by nuclear power plants is taken as 10. Tritium irradiation was analyzed by urine samples and converted to dose equivalents in mSv. Death information from the Canadian Mortality Database. The group was followed until 1987, with an average follow-up of 14 years. Results: During the period from 1951 to 1987, a total of 5 426 people (4 210 males and 1 216 females) died. Lifelong cumulative systemic exposure dose is low: 177 703 people in the 0 ~ 4 9m Sv, of which 93 260 people in 0 2m Sv below, only 1 4% of the cumulative dose of more than 100m Sv. All members of the average dose of 6 3m Sv, while the average male?