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美国在1972年到1982年的十年间,体内核医学检查的频度翻了一番。1982年比1964年的频度增长了近十倍。本文计算了检查的有效剂量当量,而且计算了按年龄特征的有效剂量当量。使用按年龄特征的有效剂量当量可以对受照人群的非对称分布提供修正,从而使其产生的有害效应能和因其它放射源所产生的有害效应相比较。使用单位放射性活度所致吸收剂量和有效剂量当量的数据取自Lindell等人的报告。对某些核医学检查单次操作所用的放射性活度的值是从Paker等人的调查报告中得到的。对无法用调查得到的数据采用Mettler等人教科书中的推荐值。计算中假定肺部显像中的1/3是采用通气法,2/3是灌注法。另外还假定所有的肺通气法是采用
In the decade from 1972 to 1982, the frequency of nuclear medicine in the United States doubled. The frequency of 1982 increased by nearly ten times that of 1964. This article calculates the effective dose equivalents examined, and calculates effective dose equivalents by age characteristics. Using age-specific effective dose equivalents can provide an amendment to the asymmetric distribution of irradiated populations, enabling them to be compared against the detrimental effects of other radioactive sources. Data on absorbed dose and effective dose equivalent using unit radioactivity are taken from the Lindell et al. Report. The values of radioactivity used for a single procedure for some nuclear medicine tests were obtained from a survey by Paker et al. Mettler et al. Textbook recommended values for data not available for investigation. The calculation assumes that 1/3 of the lungs are ventilated and 2/3 of the lungs perfusion. Also assume that all lung ventilation methods are used