| 组织阻抗频谱测量中测量频率点分布的研究 |
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| 引用本文： | 林新,董秀珍,付峰,王跃民,张国鹏. 组织阻抗频谱测量中测量频率点分布的研究[J]. 生物医学工程学杂志, 2004, 21(6): 893-896 |
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| 作者姓名： | 林新 董秀珍 付峰 王跃民 张国鹏 |
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| 作者单位： | 1. 第四军医大学,生物医学工程系,医学电子工程教研室,西安,710032
2. 第四军医大学,生理学教研室,西安,710032 |
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| 基金项目： | 国家自然科学基金资助项目 (3 0 2 70 3 78) |
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| 摘 要： | 在组织阻抗频谱测量研究中 ,作者提出了一种等角测量频率分布法 ,使测量频率点在Nyquist轨迹图中呈等角度分布。通过仿真数据模型的研究证明 :相对于通常采用的准线性测量频率分布和对数等距测量频率分布 ,在测量频率点数相同的情况下 ,采用等角测量频率分布法 ,可以提高组织阻抗频谱特征参数值α、fc 的估算精度。
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| 关 键 词： | 阻抗频谱 阻抗参数 参数拟合 频率 |
The Measurement Frequency Distribution in Tissue Impedance Spectroscopy Measurement |
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| Xin Lin,Xiuzhen Dong,Feng Fu,Yuemin Wang,Guopeng Zhang. The Measurement Frequency Distribution in Tissue Impedance Spectroscopy Measurement[J]. Journal of biomedical engineering, 2004, 21(6): 893-896 |
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| Authors: | Xin Lin Xiuzhen Dong Feng Fu Yuemin Wang Guopeng Zhang |
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| Affiliation: | Department of Medical Electronic Engineering, Faculty of Biomedical Engineering, The Fourth Military Medical University, Xi'an 710032, China. |
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| Abstract: | In the research of tissue impedance spectroscopy measurement, the authors constructed a frequency sets that produce angularly equidistant points on the Nyquist loci. The studies of simulation data model demonstrate that, by use of the same quantity of frequency points and in comparison with the frequency sets that are logarithmic and quasi-linear, the angularly equidistant frequency sets can improve the estimate accuracy of tissue electrical model parameters of alpha and fc. |
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| Keywords: | Impedance spectroscopy Impedance parameter Parametric modeling Frequency |
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