Title :
A new high resolution color flow system using an eigendecomposition-based adaptive filter for clutter rejection
Author :
Kruse, Dustin E. ; Ferrara, Katherine W.
Author_Institution :
Dept. of Biomed. Eng., California Univ., Davis, CA, USA
Abstract :
We present a new signal processing strategy for high frequency color flow mapping in moving tissue environments. A new application of an eigendecomposition-based clutter rejection filter is presented with modifications to deal with high blood-to-clutter ratios (BCR). Additionally, a new method for correcting blood velocity estimates with an estimated tissue motion profile is detailed. The performance of the clutter filter and velocity estimation strategies is quantified using a new swept-scan signal model. In vivo color flow images are presented to illustrate the potential of the system for mapping blood flow in the microcirculation with external tissue motion.
Keywords :
adaptive filters; biomedical ultrasonics; blood flow measurement; clutter; colour; eigenvalues and eigenfunctions; image resolution; medical image processing; ultrasonic imaging; HF colour flow mapping; blood flow mapping; blood velocity estimates correction; clutter rejection filter; clutter suppression performance; echoes; eigendecomposition-based adaptive filter; estimated tissue motion profile; high blood-to-clutter ratios; high frequency color flow mapping; high resolution colour flow system; in vivo color flow images; microcirculation; moving tissue environments; signal processing strategy; swept-scan signal model; Adaptive filters; Blood flow; Clutter; Doppler radar; Frequency estimation; In vivo; Motion estimation; Signal resolution; Sonar; Ultrasonic imaging; Algorithms; Blood Flow Velocity; Computer Simulation; Connective Tissue; Fingers; Humans; Image Enhancement; Microcirculation; Models, Biological; Models, Statistical; Movement; Phantoms, Imaging; Signal Processing, Computer-Assisted; Statistics as Topic; Stochastic Processes; Ultrasonography, Doppler, Color;
Journal_Title :
Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on
DOI :
10.1109/TUFFC.2002.1041080
