Laser Doppler Flowmetry Time-frequency Analysis by the S-Transform

S. Assous, A. Humeau, A. Koïtka, J.-P. L'Huillier (France)


Laser Doppler flowmetry, time-frequency analysis,S-transform.


The laser Doppler flowmetry (LDF) technique is a non invasive method that measures the microvascular blood cell perfusion through tissue. It uses the principle of Doppler shifts. LDF signals are non stationary. As other physiological signals, the LDF ones need an appropriate method to be analyzed and the extraction of the microvascular activities dynamic evolution is not an easy task. For that purpose, we introduce the S-transform method which was initially applied to geophysics signal analysis.

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