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Impedance cardiography signal denoising using discrete wavelet transform

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Abstract

Impedance cardiography (ICG) is a non-invasive technique for diagnosing cardiovascular diseases. In the acquisition procedure, the ICG signal is often affected by several kinds of noise which distort the determination of the hemodynamic parameters. Therefore, doctors cannot recognize ICG waveform correctly and the diagnosis of cardiovascular diseases became inaccurate. The aim of this work is to choose the most suitable method for denoising the ICG signal. Indeed, different wavelet families are used to denoise the ICG signal. The Haar, Daubechies (db2, db4, db6, and db8), Symlet (sym2, sym4, sym6, sym8) and Coiflet (coif2, coif3, coif4, coif5) wavelet families are tested and evaluated in order to select the most suitable denoising method. The wavelet family with best performance is compared with two denoising methods: one based on Savitzky–Golay filtering and the other based on median filtering. Each method is evaluated by means of the signal to noise ratio (SNR), the root mean square error (RMSE) and the percent difference root mean square (PRD). The results show that the Daubechies wavelet family (db8) has superior performance on noise reduction in comparison to other methods.

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Authors and Affiliations

  1. University of Tunis El-Manar, ISTMT, Laboratory of Biophysics and Medical Technologies, Tunis, Tunisia

    Souhir Chabchoub & Sofienne Mansouri

  2. Salman Bin Abdulaziz University & College of Applied Medical Sciences, Al-Kharj, Saudi Arabia

    Ridha Ben Salah

Authors
  1. Souhir Chabchoub
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  2. Sofienne Mansouri
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  3. Ridha Ben Salah
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Correspondence to Souhir Chabchoub.

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Chabchoub, S., Mansouri, S. & Salah, R.B. Impedance cardiography signal denoising using discrete wavelet transform. Australas Phys Eng Sci Med 39, 655–663 (2016). https://doi.org/10.1007/s13246-016-0460-z

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  • DOI: https://doi.org/10.1007/s13246-016-0460-z

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