| 医用CT剂量指数测量结果的不确定度评定 |
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| 引用本文： | 高铁,李国琛. 医用CT剂量指数测量结果的不确定度评定[J]. 中国测试技术, 2008, 34(6) |
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| 作者姓名： | 高铁 李国琛 |
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| 作者单位： | 温州市计量技术研究院,浙江,温州,325001 |
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| 摘 要： | 为了使医用诊断计算机断层摄影装置（CT）X射线辐射源在模体中的剂量指数测量结果的不确定度评定合理。基于用带有100mm长杆电离室的积分剂量仪测量CT剂量指数的数学模型，对其测量不确定度来源进行分析，列出了方差、灵敏系数及标准不确定度的计算公式，从而给出了CT剂量指数测量的合成标准不确定度和扩展不确定度。
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| 关 键 词： | 医用诊断计算机断层摄影装置（CT）X射线辐射源 剂量指数 测量不确定度 |
Uncertainty analyses of computed tomography dose index |
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| GAO Tie,LI Guo-chen. Uncertainty analyses of computed tomography dose index[J]. China Measurement Technology, 2008, 34(6) |
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| Authors: | GAO Tie LI Guo-chen |
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| Affiliation: | GAO Tie,LI Guo-chen(Wenzhou Institute of Measurement Technology,Wenzhou 325001,China) |
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| Abstract: | In order to make the uncertainty of the dose index measurement in the head phantom reasonable for the medical diagnostic X-ray radiation sources of the computed tomography(CT),the measurement uncertainty components were analyzed according to the mathematical model for the computed tomography dose index test method with a 100 mm ionization chamber.And the calculated formula for square-error,sensitivity coefficient and standard deviation were listed in the article.As the results,the standard measurement uncer... |
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| Keywords: | Medical diagnostic X-ray radiation source for computed tomography Dose index Uncertainty |
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