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- W2117312963 abstract "The ultrasonic attenuation of soft tissue is usually mod- eled by the frequency function exp (-r'(,t)j''), which due to the band- pass character of the transducer, can be measured only within a lim- ited-frequency band. A parametric description of the attenuation in the passband of the transducer is made by means of first-order time- varying minimum-phase network functions. It is shown that quite good approximations of the exponential attenuation can be achieved for con- tinuously varying depth .r in a large x-interval hy gradual connnection of additional networks. By a network description of the attenuation a method for separating attenuation and texture of tissue has been de- vised. It recursively estimates the attenuation, and this estimate con- trols the parameters in an inverse time-varying network in which the output depends almost only on the texture. The behavior of the device is shown by means of both simulated and in vivo measured ultrasonic signals." @default.
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- W2117312963 date "1986-05-01" @default.
- W2117312963 modified "2023-09-26" @default.
- W2117312963 title "On the Separation of Attenuation and Texture of Tissue Using a Parametric Time-Varying Network" @default.
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- W2117312963 doi "https://doi.org/10.1109/t-uffc.1986.26830" @default.
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