组织阻抗频谱测量中测量频率点分布的研究

The Measurement Frequency Distribution in Tissue Impedance Spe ctroscopy Measurement

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。

In the research of tissue impedance spectroscopy measure me nt, the authors constructed a frequency sets that produce angularly equidistant points on the Nyquist loci. The studies of simulation data model demonstrate tha t, by use of the same quantity of frequency points and in comparison with the fr equency sets that are logarithmic and quasi-linear, the angularly equidistant f requency sets can improve the estimate accuracy of tissue electrical model param eters of α and f c.