Abstract:Doppler signals from the umbilical artery of 20 women with normal pregnancy between 18-20 weeks of gestation were recorded. As a new alternative technique to take the place of traditional short-time Fourier transform (STFT) method, the application of fractal analysis method to the umbilical artery Doppler signals is presented. Traditional Doppler indexes which are resistance index (RI), pulsality index (PI), systolic: diastolic ratio (S/D) indexes have been calculated from the maximum frequency envelope of Dop… Show more
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