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英国常见的放射、荧光透视和牙科X射线检查的国家参考剂量。

National reference doses for common radiographic, fluoroscopic and dental X-ray examinations in the UK.

作者信息

Hart D, Hillier M C, Wall B F

机构信息

Radiation Protection Division, Health Protection Agency, Chilton, Didcot, Oxon, UK.

出版信息

Br J Radiol. 2009 Jan;82(973):1-12. doi: 10.1259/bjr/12568539. Epub 2008 Oct 13.

Abstract

The National Patient Dose Database (NPDD) is maintained by the Radiation Protection Division of the Health Protection Agency. The latest review of the database analysed the data collected from 316 hospitals over a 5-year period to the end of 2005. The information supplied amounted to a total of 23 000 entrance surface dose measurements and 57 000 dose-area product measurements for single radiographs, and 208 000 dose-area product measurements along with 187 000 fluoroscopy times for diagnostic examinations or interventional procedures. In addition, patient dose data for dental X-ray examinations were included for the first time in the series of 5-yearly reviews. This article presents a summary of a key output from the NPDD - national reference doses. These are based on the third quartile values of the dose distributions for 30 types of diagnostic X-ray examination and 8 types of interventional procedure on adults, and for 4 types of X-ray examination on children. The reference doses are approximately 16% lower than the corresponding values in the previous (2000) review, and are typically less than half the values of the original UK national reference doses that were derived from a survey in the mid-1980s. This commentary suggests that two of the national reference doses from the 2000 review be retained as diagnostic reference levels because the older sample size was larger than for the 2005 review. No clear evidence could be found for the use of digital imaging equipment having a significant effect on dose.

摘要

国家患者剂量数据库(NPDD)由健康保护局辐射防护司维护。对该数据库的最新审查分析了截至2005年底的5年期间从316家医院收集的数据。提供的信息包括单张X光片的23000次入射表面剂量测量和57000次剂量面积乘积测量,以及诊断检查或介入程序的208000次剂量面积乘积测量和187000次透视时间。此外,牙科X光检查的患者剂量数据在5年一次的审查系列中首次被纳入。本文概述了NPDD的一项关键产出——国家参考剂量。这些参考剂量基于30种成人诊断性X光检查和8种介入程序以及4种儿童X光检查的剂量分布的第三四分位数。参考剂量比上一次(2000年)审查中的相应值低约16%,通常不到20世纪80年代中期一项调查得出的英国原始国家参考剂量值的一半。本评论建议保留2000年审查中的两项国家参考剂量作为诊断参考水平,因为旧样本量比2005年审查时的大。没有发现明确证据表明使用数字成像设备对剂量有显著影响。

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