×

Doppler ultrasound method and apparatus for monitoring blood flow and detecting emboli

  • US 6,547,736 B1
  • Filed: 05/18/2000
  • Issued: 04/15/2003
  • Est. Priority Date: 11/11/1998
  • Status: Expired due to Term
First Claim
Patent Images

1. A method for detecting embolic events using a Doppler ultrasound system sensing motion along an ultrasound beam, the Doppler ultrasound system compiling for a plurality of time periods movement information including detected Doppler shift signal power and associated velocity for a plurality of locations along the ultrasound beam, the method comprising:

  • subtracting a respective background power level from the compiled movement information for each of the plurality of locations and time periods;

    for each time period, removing movement information having a detected velocity less than a velocity threshold from the subtracted compiled movement information;

    performing for each time period a plurality of binary characterization tests to determine whether the resultant compiled movement information is indicative of an embolic event; and

    reviewing the results of the binary characterization tests to reject any false positive identifications of an embolic event.

View all claims
  • 3 Assignments
Timeline View
Assignment View
    ×
    ×