Correlator circuit and device for ultrasound flow mapping...

Details Correlator circuit and device for ultrasound flow mapping... Correlator circuit and device for ultrasound flow mapping...

G - Physics

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G01S 7/52 (2006.01) A61B 8/06 (2006.01) G01S 15/89 (2006.01) G06F 17/15 (2006.01)

Patent

CA 1283200

PHA 21.32OC 14 2-10-1986 ABSTRACT: Correlator circuit and device for ultrasonic flow mapping comprising such a circuit. A circuit for determining the cross-correlation function between two digitally sampled signals comprises a plurality of fractional step delay (FSD) digital interpolation filters (86,87,88) which estimate the value of one of said input signals at intervals between said samples and a plurality of correlation circuits (89-97) each of which determines the correlation between the first signal and the output of one of said interpolation filters. A device for ultrasound flow mapping comprising such a circuit has an improved accuracy. (Fig. 14a)

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