×

Method and apparatus for abberation correction in the presence of a distributed aberrator

  • US 5,673,699 A
  • Filed: 05/31/1996
  • Issued: 10/07/1997
  • Est. Priority Date: 05/31/1996
  • Status: Expired due to Fees
First Claim
Patent Images

1. A method for phase aberration correction for use with medical ultrasound imaging systems employing a probe in contact with the body of a subject, comprising:

  • generating a first ultrasound pulse at a first set of preselected transmit elements to define a first transmit aperture;

    focusing said first ultrasound pulse to a predetermined target point in said subject;

    transmitting said first focused ultrasound pulse from said first aperture to said target location;

    receiving echoes of said first ultrasound at a first plurality of receive transducer elements;

    storing electronic signal data corresponding to said first pulse echoes measured by a predetermined number of said first plurality of receive elements;

    generating a second ultrasound pulse at a second set of preselected transmit elements different from said first set of preselected transmit elements to define a second transmit aperture spatially translated relative to said first transmit aperture;

    focusing said second ultrasound pulse to said target location;

    transmitting said second focused ultrasound pulse from said second transmit aperture to said target location;

    receiving echoes of said second ultrasound pulse at a second plurality of receive transducer elements;

    processing electronic signal data corresponding to said second pulse echo measured by each of a predetermined number of said second plurality of receive elements;

    comparing variations of electronic signal data between said first and second echoes to estimate signal variations; and

    correcting said phase aberrations with said estimated signal variations.

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