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Ultrasonic diagnostic apparatus for obtaining blood data

  • US 5,971,927 A
  • Filed: 10/20/1997
  • Issued: 10/26/1999
  • Est. Priority Date: 10/21/1996
  • Status: Expired due to Term
First Claim
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1. An ultrasonic diagnostic apparatus comprising:

  • scanning means for scanning an interested region including an interested blood vessel of a subject so as to receive echo signals;

    means for detecting Doppler signals from the echo signals for sample points in the interested region;

    means for calculating an average frequency, a variance, and power at each of the sample points based on the Doppler signals;

    means for picking up out of the sample points phase, one sample point whose one of the average frequency, the variance, and power is characteristic of the sample points; and

    means for forming a time curve of the blood current based on at least one of the average frequency, the variance and power of the picked up sample point.

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