Abstract: Preliminary results are presented for a color-flow imaging system being developed to detect early cancer by imaging tissue elasticity and blood flow simultaneously. The principal challenge is to separate blood velocities from movement of the surrounding tissues even though the corresponding Doppler spectra overlap. This report examines a broad range of digital filter designs using pulse-echo measurements from tissue-like materials. Adaptive eigenfilters are most able to separate the sources of physiological motion. When used with an improved autocorrelation technique (2-D autocorrelator), accurate and precise velocity estimates were obtained for slow pulsatile flow in 3-mm-diameter vessels with a peak velocity of 30 mm/s
To submit an update or takedown request for this paper, please submit an Update/Correction/Removal Request.