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Ultrasonic diagnosis apparatus

  • US 5,090,412 A
  • Filed: 02/27/1990
  • Issued: 02/25/1992
  • Est. Priority Date: 08/31/1987
  • Status: Expired due to Fees
First Claim
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1. In an ultrasonic diagnostic apparatus comprising means for scanning the interior of a subject'"'"'s body with a plurality of beams, each of said beams comprising ultrasonic pulses;

  • and means for receiving echo signals returning from the subject'"'"'s body with respect to various sound rays of said ultrasonic, pulses, the improvement comprisingmeans for determining a receiving signal for a portion of one of said sound rays by effecting a correlation process on the echo signals of said plurality of ultrasonic pulses each having a difference in directionality within a rang of bearing resolution of the respective ultrasonic beam; and

    means for forming a sectional image of the subject'"'"'s body on the basis of the receiving echo signal of the respective sound ray thus determined, whereby speckle noise is eliminated from the sectional image.

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