| 利用Barracuda系统测量医用CT剂量指数量值不确定度评定 |
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| 引用本文： | 李秀芹,赵进沛,杨会锁,胡平,杨新芳.利用Barracuda系统测量医用CT剂量指数量值不确定度评定[J].职业与健康,2012,28(8):954-955. |
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| 作者姓名： | 李秀芹 赵进沛 杨会锁 胡平 杨新芳 |
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| 作者单位： | 1. 中国人民解放军北京军区疾病预防控制中心卫生防护科,北京市,100042
2. 石家庄市疾病预防控制中心 |
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| 摘 要： | 目的为保证医用CT剂量指数量值的准确性,评定其不确定度。方法建立Barracuda系统10 cm长杆电离室测量CT剂量指数数学模型,分析不确定度来源,通过计算给出不确定度。结果相对扩展不确定度为6.5%。结论利用Bar-racuda系统测量医用CT剂量指数量值不确定度主要受测量系统不确定度、校准因子、层厚偏差等分量的影响。
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| 关 键 词： | Barracuda、医用CT 剂量指数 测量不确定度 |
Evaluation of uncertainty in measurement of computed tomography dose index by Barracuda system |
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| LI Xiu-qin
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ZHAO Jin-pei
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YANG Hui-suo
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HU Ping
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YANG Xin-fang.Evaluation of uncertainty in measurement of computed tomography dose index by Barracuda system[J].Occupation and Health,2012,28(8):954-955. |
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| Authors: | LI Xiu-qin ZHAO Jin-pei YANG Hui-suo HU Ping YANG Xin-fang |
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| Institution: | *Department of Health Protection,Center for Disease Control and Prevention,Beijing Military Region of PLA,Beijing,100042,China |
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| Abstract: | Objective]In order to ensure the accuracy of computed tomography dose index,to evaluate the measurement uncertainty.Methods]The mathematical model of Barracuda system with 10 cm long ionization chamber in measurement of computed tomography dose index was established,the uncertainty was calculated by analyzing the uncertainty source.Results]The relative expanded uncertainty was 6.5%.Conclusion]The uncertainty of Barracuda system in measurement of computed tomography dose index is mainly influenced by the uncertainty of the measurement system,the calibration factors and the thickness deviation. |
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| Keywords: | Barracuda Computed tomography Dose index Measurement uncertainty |
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