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Ultrasonic imaging apparatus

  • US 5,072,735 A
  • Filed: 06/19/1989
  • Issued: 12/17/1991
  • Est. Priority Date: 06/21/1988
  • Status: Expired due to Term
First Claim
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1. An ultrasonic imaging apparatus comprising:

  • ultrasonic transducer means for propagating ultrasonic beams toward a subject, and converting echo beams reflected from the subject into an echo signal;

    focus setting means for setting a plurality of focal depths;

    delay control means connected to said focus setting means, for outputting a plurality of delay signals corresponding to a plurality of the focal depths, said delay control means including means for detecting a central portion of a display range, means for changing the focal depths set by said focus setting means to a plurality of new focal depths corresponding to a plurality of locations within the display range and near the central portion of the display range, and means for outputting a new plurality of delay signals corresponding to the new focal depths;

    transmitter/receiver means connected to said ultrasonic transducer means and said delay control means, for driving said ultrasonic transducer means in accordance with the delay signals to scan the subject in a multi-focusing manner, and for processing the echo signal output from the ultrasonic transducer means; and

    display means connected to said transmitter/receiver means, for displaying a B-mode image based on the echo signal supplied from said transmitter/receiver means.

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