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  • 标题:Bioimpedance Parameter Estimation using Fast Spectral Measurements and Regularization
  • 本地全文:下载
  • 作者:Roberto G. Ramírez-Chavarría ; Gustavo Quintana-Carapia ; Matias I. Müller
  • 期刊名称:IFAC PapersOnLine
  • 印刷版ISSN:2405-8963
  • 出版年度:2018
  • 卷号:51
  • 期号:15
  • 页码:521-526
  • DOI:10.1016/j.ifacol.2018.09.198
  • 语种:English
  • 出版社:Elsevier
  • 摘要:AbstractThis work proposes an alternative framework for parametric bioimpedance estimation as a powerful tool to characterize biological media. We model the bioimpedance as an electrical network of parallelRC circuits,and transform the frequency-domain estimation problem into a time constant domain estimation problem by means of the distribution of relaxation times (DRT) method. The Fredholm integral equation of the first kind is employed to pose the problem in a regularized least squares (RLS) form. We validate the proposed methodology by numerical simulations for a synthetic biological electrical circuit, by using a multisine signal in the frequency range of 1kHz to 853kHz and considering an error in variables (EIV) problem. Results show that the proposed method outperforms the state-of-the-art techniques for spectral bioimpedance analysis. We also illustrates its potentiality in terms of accurate spectral measurements and precise data interpretation, for further usage in biological applications.
  • 关键词:KeywordsBiomedical SystemsFrequency MeasurementsImpedance SpectroscopyParameter EstimationRegression AlgorithmSpectrum Analysis
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