An inter-hospital comparison of patient dose based on clinical indications

被引:25
作者
Teeuwisse, W. [1 ]
Geleijns, J. [1 ]
Veldkamp, W. [1 ]
机构
[1] Leiden Univ, Med Ctr, Dept Radiol, NL-2300 RC Leiden, Netherlands
关键词
average glandular dose; computed tomography; clinical indication; dosimetry; effective dose;
D O I
10.1007/s00330-006-0473-1
中图分类号
R8 [特种医学]; R445 [影像诊断学];
学科分类号
1002 ; 100207 ; 1009 ;
摘要
Patient dose is usually estimated for a single radiographic projection or computed tomography (CT) series. In this study, patient dose was calculated for predefined clinical indications (24 radiography, 11 CT). Members of the radiology staff of each of 11 hospitals were trained in dose measurement and calculation techniques. Based on clinical indications participants decided on imaging protocols and calculated cumulative effective dose for a complete examination. Effective dose ranged from < 1 mu Sv to 0.6 mSv for examinations with radiographs and from 0.2 to 12 mSv for CT scans. Differences in the imaging protocols contributedd to a substantial variation in patient dose. For mammography, average glandular dose (AGD) was estimated for 32-, 53- and 90-mm compressed breast thicknesses, with a median value of 0.74, 1.74 and 3.40 mGy, respectively. The results presented here demonstrate that a pragmatic choice of dosimetry methods enables local staff to estimate effective dose. The inclusion of imaging protocols in the dose surveys provided a broader view on the variations in patient dose between hospitals.
引用
收藏
页码:1795 / 1805
页数:11
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