COMPARISON OF FFT-BASED AND AR-BASED SONOGRAM OUTPUTS OF 20 MHZ PULSED DOPPLER DATA IN REAL-TIME


GULER N., KIYMIK M., GULER İ.

COMPUTERS IN BIOLOGY AND MEDICINE, vol.25, no.4, pp.383-391, 1995 (SCI-Expanded) identifier identifier identifier

Abstract

Real time sonogram outputs of autoregressive (AR) and Fast Fourier Transform (FFT) spectral analysis of 20 MHz pulsed ultrasonic Doppler blood flowmeter are presented. Data obtained from coronary, renal, iliac, digital and mesenteric arteries were processed using AR- and FFT-based spectral analysis techniques and interpretable sonograms were constructed. In comparison with the FFT-based sonogramm outputs, AR-based sonogram outputs for 20 MHz pulsed Doppler data provide better results. Hence, the AR modeling is strongly recommended for small vessels with diameters between 1 and 2 mm.