辐射防护2013，Vol.33Issue(2)：74-81,8.
医用X射线CT主要检查类型所致成年受检者剂量研究
Research on the Radiation Doses to Adults Receiving from Main Types of Medical X-ray CT Examinations
摘要
Abstract
To study and master the doses to examinees receiving from the wide spread X - CT examinations, is a key issue for strengthening the medical radiation protection. In the studies of the medical exposure levels during the Eleventh Five - Year Plan period in Shanghai, based on the brands of X - CT scanners and their distributions in different levels of hospitals, a total of 45 sets (about 30% of all) of scanners were selected for the field study. Among the 8 commonly performed examinations, the scan parameters and their relevant dosimetry information for 500 adults were collected, and their typical effective doses were estimated with the dose conversion factors. The results showed that the averages of weighted CT dose index ( CTDI W) were 55.4,12.5 and 18.4 mGy,and the dose length products (DLP) were averaged to be 603,294 and 415 mGy cm, for the skull, chest and abdomen X - CT scans, respectively. The typical effective doses were estimated to be 1.4,5.3, and 7. 5 mSv for adults in the head, chest and abdomen X - CT scans,respectively. The values of CTDI for skull scans were generally higher than those for the ear canal, eye, or sinus examinations. It is clear that the optimization between the image quality and the radiation dose should be further strengthened. Particular attentions should be paid in selecting the scanning parameters for various types of X - CT scans, and the diagnostic reference levels for X - CT examinations should be continuously improved.关键词
X-CT/CT剂量指数/剂量长度乘积/有效剂量/诊断参考水平Key words
X-ray computed tomography/ CT dose index/ dose length product/ effective dose/ diagnostic reference level分类
医药卫生引用本文复制引用
高林峰,郑钧正,卓维海,王彬,曲良勇,姚杰,钱爱君..医用X射线CT主要检查类型所致成年受检者剂量研究[J].辐射防护,2013,33(2):74-81,8.基金项目
上海市放射卫生重点学科建设项目(08 GWZX 0602) （08 GWZX 0602）
卫生行业科研专项(201002009) （201002009）
上海市公共卫生人才培养计划项目(GWDTR 201206,GWDTR 201208) （GWDTR 201206,GWDTR 201208）
上海市卫生局科研项目(2007177). （2007177）
