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Importance of wavelet analysis in laser Doppler flowmetry time series.

Bernjak, Alan and Stefanovska, Aneta (2007) Importance of wavelet analysis in laser Doppler flowmetry time series. In: 2007 ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY, VOLS 1-16. IEEE Engineering in Medicine and Biology Society Annual Conference (EMBS) . IEEE, NEW YORK, NY 10017, USA. ISBN 978-1-4244-0787-3

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Abstract

Spectral analysis of microvascular laser Doppler flowmetry time series is performed to resolve their complex dynamics. The method of analysis should be carefully chosen such that as much information as possible of the signal is obtained. Conventional Fourier transform and short-time Fourier transform are compared with wavelet analysis to resolve several oscillatory components on a wide frequency interval. Wavelet transform with the Morlet mother wavelet is shown to have an advantage of adjustable window length as it detects each frequency with a window of a corresponding length. In this way good localization in time and frequency is provided. Low and high frequencies can be resolved and their variations traced in time. This is of crucial importance in analysis of oscillations in LDF signals and studies of their physiological origin as well as their changes in health and disease.

Item Type: Contribution in Book/Report/Proceedings
Subjects: Q Science > QC Physics
Departments: Faculty of Science and Technology > Physics
ID Code: 54636
Deposited By: ep_importer_pure
Deposited On: 28 May 2012 13:52
Refereed?: No
Published?: Published
Last Modified: 10 Apr 2014 01:10
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/54636

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