Title :
Improving Doppler ultrasound spectroscopy with multiband instantaneous energy separation
Author :
Maragos, Petros ; Loupas, Thanasis ; Pitsikalis, Vassilis
Author_Institution :
Dept. of Electr. & Comput. Eng., Nat. Tech. Univ. of Athens, Greece
Abstract :
This paper deals with improving the time-frequency resolution of Doppler ultrasound spectroscopy, applied to blood flow analysis, by developing robust nonstationary spectrum estimation techniques based on Gabor (1946) filterbanks and multiband AM-FM demodulation that uses an instantaneous energy separation algorithm.
Keywords :
Doppler effect; amplitude modulation; biomedical ultrasonics; channel bank filters; demodulation; filtering theory; frequency modulation; haemodynamics; medical image processing; signal resolution; source separation; spectral analysis; spectroscopy; time-frequency analysis; Doppler ultrasound spectroscopy; Gabor filterbanks; blood flow analysis; instantaneous energy separation algorithm; multiband AM-FM demodulation; multiband instantaneous energy separation; robust nonstationary spectrum estimation; time-frequency resolution; Algorithm design and analysis; Blood flow; Demodulation; Energy resolution; Gabor filters; Robustness; Spectral analysis; Spectroscopy; Time frequency analysis; Ultrasonic imaging;
Conference_Titel :
Digital Signal Processing, 2002. DSP 2002. 2002 14th International Conference on
Print_ISBN :
0-7803-7503-3
DOI :
10.1109/ICDSP.2002.1028164
