Effects of wavelets analysis on power spectral distributions in laser doppler flowmetry time series

G. D'Addio, M. Cesarelli, P. Bifulco, L. Iuppariello, G. Faiella, D. Lapi, A. Colantuoni

Research output: Chapter in Book/Report/Conference proceedingChapter

Abstract

The evaluation of endothelium function impairments are of great clinical interest in many vascular diseases and laser Doppler flowmetry (LDF) is the gold standard technique for its evaluation. LDF signals show low-frequency oscillations related to heartbeat, respiratory, myogenic and endothelial activities. Although wavelets analysis (WLT) of LDF has been shown as a better technique than Fourier (FFT) and Short Time Fourier Transform (STFT) in the resolution of these oscillatory components, the overall spectral power modifications have not yet been described. Aim of the paper is to study the effects of WLT analysis on power spectral distributions in LDF. We studied 20 min LDF recordings of 20 obese subjects by PeriFlux LDF system. Signals were detrended by moving average algorithms and transformed by FFT, STFT and WLT for spectral analysis. The spectral power has been calculated in bands I (0.6-2 Hz), II (0.145-06), III (0.052-0.145), IV (0.021-0.052), V (0.0095-0.021) and VI (0.005-0.0095) in percent values of the total spectral power. Results of the ANOVA tests between spectral powers in the six bands by the three different spectral analysis' methods showed that WLT exhibited the highest F-value, reflecting significant difference (p

Original languageEnglish
Title of host publicationIFMBE Proceedings
Pages647-650
Number of pages4
Volume41
DOIs
Publication statusPublished - 2014
Event13th Mediterranean Conference on Medical and Biological Engineering and Computing 2013, MEDICON 2013 - Seville, Spain
Duration: Sep 25 2013Sep 28 2013

Other

Other13th Mediterranean Conference on Medical and Biological Engineering and Computing 2013, MEDICON 2013
CountrySpain
CitySeville
Period9/25/139/28/13

Keywords

  • Fourier transform
  • Laser doppler flowmetry
  • Short time fourier transform
  • Skin blood flow
  • Wavelets analysis

ASJC Scopus subject areas

  • Biomedical Engineering
  • Bioengineering

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    D'Addio, G., Cesarelli, M., Bifulco, P., Iuppariello, L., Faiella, G., Lapi, D., & Colantuoni, A. (2014). Effects of wavelets analysis on power spectral distributions in laser doppler flowmetry time series. In IFMBE Proceedings (Vol. 41, pp. 647-650) https://doi.org/10.1007/978-3-319-00846-2_160