Lam C, Martin C J
Department of Bio-Medical Physics and Bio-Engineering, Aberdeen University, Foresterhill, UK.
Br J Radiol. 1991 Sep;64(765):831-5. doi: 10.1259/0007-1285-64-765-831.
A database system has been set up on an IBM PC to store X-ray quality assurance (QA) data and patient doses for all X-ray equipment operated by Grampian Health Board. Graphical analysis facilities have been developed to display data in a readily understandable form. Data on equipment specifications, QA test results, exposure factors for standard examinations, and thermoluminescent dosemeter (TLD) measurements of patient skin doses are stored in separate forms. X-ray machine outputs are fitted to a simple polynomial equation, and the data combined with information on exposure factors to calculate entrance doses for selected examinations. Data such as filtration and backscatter factors are derived from look-up tables for use in dose calculations. Histogram comparisons can be made between calculated doses, means of TLD measurements and National Radiological Protection Board reference levels to allow units giving high skin doses to be identified so that corrective actin can be taken.
已在一台IBM个人计算机上建立了一个数据库系统，用于存储格兰扁健康委员会操作的所有X射线设备的X射线质量保证（QA）数据和患者剂量。已开发出图形分析工具，以易于理解的形式显示数据。有关设备规格、QA测试结果、标准检查的曝光因子以及患者皮肤剂量的热释光剂量计（TLD）测量数据，均以单独的形式存储。X射线机输出结果拟合到一个简单的多项式方程，并将数据与曝光因子信息相结合，以计算选定检查的入射剂量。诸如过滤和反向散射因子等数据来自查找表，用于剂量计算。可以对计算剂量、TLD测量平均值和国家放射防护委员会参考水平进行直方图比较，以便识别出皮肤剂量高的设备，从而采取纠正措施。
