Journal ArticleDOI
Spectral characterization and attenuation measurements in ultrasound.
TLDR
In this paper, a simple method for estimating frequency-dependent attenuation via measurement of the zero crossing density of the signal is presented and validated, both the effects of the frequency dependence of scatter and stochastic variability of the measurement are considered and discussed.About:
This article is published in Ultrasonic Imaging.The article was published on 1983-04-01. It has received 117 citations till now. The article focuses on the topics: Attenuation.read more
Citations
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Journal ArticleDOI
Elastography: ultrasonic estimation and imaging of the elastic properties of tissues.
Jonathan Ophir,S.K. Alam,Brian S. Garra,Faouzi Kallel,Elisa E. Konofagou,Thomas A. Krouskop,Tomy Varghese +6 more
TL;DR: The strain filter formalism and its utility in understanding the noise performance of the elastographic process is given, as well as its use for various image improvements.
Journal ArticleDOI
Chirp subbottom profiler for quantitative sediment analysis
TL;DR: In this article, a wideband, frequency-modulated, subbottom profiling system (the chirp sonar) can remotely determine the acoustic attenuation of ocean sediments and produce artifact-free sediment profiles in real time.
Journal ArticleDOI
Estimating acoustic attenuation from reflected ultrasound signals: Comparison of spectral-shift and spectral-difference approaches
TL;DR: In this article, two approaches for estimating the attenuation coefficient of soft biological tissue have been examined: the spectral shift approach, which estimates β from the downward shift experienced by the propagating pulse spectrum with penetration into the liver, and the spectral-difference approach (SDA) which estimates α from the slope of the log spectral differences.
PatentDOI
Power spectral strain estimators in elastography
TL;DR: It is demonstrated that strain estimation using the spectral-shift technique is moderately less precise, but far more robust than the cross-correlation method.
Journal ArticleDOI
Texture Analysis of Ultrasonic Images of the Prostate by Means of Co-occurrence Matrices
TL;DR: In this paper, the second-order statistics, namely co-occurrence matrices, were used to discriminate the various prostatic tissues (normal tissue, benign prostatic hypertrophy and cancer) by means of texture analysis.
References
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Journal ArticleDOI
Mathematical analysis of random noise
TL;DR: In this paper, the authors used the representations of the noise currents given in Section 2.8 to derive some statistical properties of I(t) and its zeros and maxima.
Journal ArticleDOI
Estimating the Acoustic Attenuation Coefficient Slope for Liver from Reflected Ultrasound Signals
Roman Kuc,M. Schwartz +1 more
TL;DR: In this paper, an acoustic Fabry-Perot interferometer is used for measuring high-frequency acoustic losses in isotropic and anisotropic materials with high Q-factor.
Journal ArticleDOI
Evaluation of backscattering coefficients for excised human tissues: results, interpretation and associated measurements
TL;DR: In this article, the ultrasonic attenuation coefficient, the velocity of sound propagation and the differential scattering coefficient (for 180° scattering) for 3 types of freshly excised normal human tissues: liver, spleen and brain (white matter) were measured as a continuous function of frequency in the range 0.7-7 MHz.
Journal ArticleDOI
Ultrasonic Signal Processing for in Vivo Attenuation Measurement: Short Time Fourier Analysis
TL;DR: The use of short-time Fourier analysis is investigated to provide an estimation of the echographic spectral composition as a function of time and it will be shown that the time dependence of the spectral centroid of this representation allows one to deduce easily the frequency-dependent attenuation.
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Ultrasonic Signal Processing for in Vivo Attenuation Measurement: Short Time Fourier Analysis
Estimating the Acoustic Attenuation Coefficient Slope for Liver from Reflected Ultrasound Signals
Roman Kuc,M. Schwartz +1 more