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- W1498986044 abstract "The Fourier analysis has become a standard tool to study blood flow in cardiovascular system. However it is not able to perform a time-frequency analysis of signals generated by the blood flow. Non-stationary signals, such as Doppler signals, require the notion of frequency analysis that is local in time. Time-frequency distributions can be applied to perform time-frequency analysis. The aim of this work is to reconstruct the blood flow profiles using Cohen's class time-frequency distribution by estimating the instantaneous frequency of a simulated pulsed Doppler signal. Velocity profiles were theoretically computed from Womersley's equation for a pulsatile stationary-state flow in a circular-cross section tube. Errors in the estimation of the pseudo-instantaneous mean frequency were computed for different sampling windows sizes. The blood flow velocity profiles of a carotid artery calculated with the Wigner-Ville time-frequency distribution show a good agreement with the velocity profiles given by the Womersley's model." @default.
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- W1498986044 date "2004-06-21" @default.
- W1498986044 modified "2023-10-01" @default.
- W1498986044 title "Time-frequency distribution applied to blood flow velocity profiles" @default.
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- W1498986044 doi "https://doi.org/10.1109/iembs.2003.1279627" @default.
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