Ultrasound scanner for tissue characterization
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United States of America Patent
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-
Apr 21, 1987
Grant Date -
N/A
app pub date -
May 31, 1985
filing date -
May 31, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Both the linear attenuation coefficient and an index describing the heterogeneity of the scatterers of tissue can be obtained simultaneously by the method and system disclosed herein. The system also produces a B-scan image with optimal time-variable gain compensation. The system combines an envelope peak method with a conventional ultrasound pulse-echo scanner. In this method, the peaks of the echo envelopes in a B-scan are multiplied by a controllable gain function. By adjusting the parameter of the gain function, the noise-to-signal ratio (NSR) of the envelope peaks is minimized. The minimum NSR can be used as an index to describe the heterogeneity of the tissue scatterers and the parameter of the gain function corresponding to the minimum NSR is equal to the attenuation coefficient of the tissue.
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