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Method and apparatus for remote tissue identification by statistical modeling and hypothesis testing of echo ultrasound signals

  • US 4,542,744 A
  • Filed: 03/23/1983
  • Issued: 09/24/1985
  • Est. Priority Date: 03/23/1983
  • Status: Expired due to Fees
First Claim
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1. A method for remote identification of a tissue using ultrasound, comprising the steps of:

  • directing ultrasound energy into an unknown tissue;

    measuring values of a characteristic of echoes of the ultrasound which are scattered from the unknown tissue;

    accumulating a statistically significant sample of the measured values of the characteristic;

    filtering the accumulated sample to determine, for each of a plurality of predetermined mathematical models, each of which is associated with a possible tissue type, a signal which is a measure of the likelihood that the accumulated sample of measured values was generated by said mathematical model;

    applying the the filtered signals as inputs of a predetermined logical decision function which selects one of the models which most likely produced the sample; and

    assigning the tissue type which is associated with the chosen model as the identity of the unknown tissue.

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