×

Method for adaptively filtering doppler signals using a complex time domain filter

  • US 5,445,156 A
  • Filed: 11/02/1994
  • Issued: 08/29/1995
  • Est. Priority Date: 11/02/1994
  • Status: Expired due to Fees
First Claim
Patent Images

1. A processor for color flow imaging of velocity of scatterers flowing past moving tissue, comprising:

  • a source of basebanded signals;

    a first velocity estimator for estimating velocity of said tissue based on said basebanded signals;

    selection logic means for selecting complex filter coefficients in dependence on at least said estimated tissue velocity;

    delay means coupled to receive said basebanded signals;

    a complex filter coupled to receive delayed basebanded signals from said delay means and to receive signals representing complex filter coefficients from said selection logic means; and

    a second velocity estimator for estimating flow velocity of said scatterers based on said filtered basebanded signals.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×