Quantification of the backscatter coefficient in heterogeneous media: Comparison of attenuation compensation methods

2020 ◽  
Vol 148 (4) ◽  
pp. 2559-2559
Author(s):  
Laura Casta ñeda-Martinez ◽  
Timothy J. Hall ◽  
Noushin Jafarpisheh ◽  
Hayley Whitson ◽  
Hassan Rivaz ◽  
...  
Keyword(s):  
Heterogeneous Media ◽  
Backscatter Coefficient ◽  
Attenuation Compensation ◽  
Media Comparison ◽  
Compensation Methods

Comparison of attenuation compensation methods in the estimation of the backscatter coefficient of breast cancer

2021 ◽  
Vol 150 (4) ◽  
pp. A55-A55
Author(s):  
Laura Castañeda-Martinez ◽  
Hayley Whitson ◽  
Noushin Jafarpisheh ◽  
Jorge Castillo-Lopez ◽  
Hector Galvan-Espinosa ◽  
...  
Keyword(s):  
Breast Cancer ◽  
Backscatter Coefficient ◽  
Attenuation Compensation ◽  
Compensation Methods

Total attenuation compensation for backscatter coefficient estimation using full angular spatial compounding

Ultrasonics ◽  
2021 ◽  
Vol 114 ◽  
pp. 106376
Author(s):  
Andres Coila ◽  
Julien Rouyer ◽  
Omar Zenteno ◽  
Adam Luchies ◽  
Michael L. Oelze ◽  
...  
Keyword(s):  
Backscatter Coefficient ◽  
Spatial Compounding ◽  
Total Attenuation ◽  
Attenuation Compensation ◽  
Coefficient Estimation

Optics of Heterogeneous Media. Comparison of Some Light Scattering Model Calculations

1993 ◽  
Vol 58 (10) ◽  
pp. 2272-2281 ◽  
Author(s):  
Jaroslav Holoubek
Keyword(s):  
Heterogeneous Media ◽  
Incident Light ◽  
Mie Theory ◽  
Polystyrene Latex ◽  
Asymmetry Factor ◽  
Good Correspondence ◽  
Model Calculations ◽  
Surrounding Matrix ◽  
Media Comparison ◽  
Scattering Correction

Typical dependences of turbidity as a function of diameter of scattering elements and their volume fractions as well as a function of the wavelength of the incident light were calculated, based both on the Lorenz-Mie theory and the fluctuation theory of Debye and Bueche. Such dependences calculated for the polyethylene, polypropylene and polyamide inclusions differing slightly in their reactive index from the surrounding matrix of the same material were compared. The multiple scattering correction of the Lorenz-Mie theory based on the asymmetry factor affects the turbidity similarly as the use of mixing rule for refractive indices of multicomponent systems. A good correspondence between both theories was found only for small scattering inclusions fulfilling the approximate condition for diameter d < 0.3 λ. Only approximate agreement of the turbidity and refractive index fluctuations up to the diameters d < 5 λ can be observed for the present systems using both theories. The results obtained for the solid polymers were compared with model calculations for polystyrene latex under identical conditions: the latter are in a reasonable agreement with the expected trends (more pronounced dispersion and larger turbidity).

RADIATION BOUNDARY CONDITIONS FOR VERTICALLY HETEROGENEOUS ACOUSTIC MEDIA

1993 ◽  
Vol 01 (03) ◽  
pp. 321-333 ◽  
Author(s):  
GONGQIN LI ◽  
JOSEPH E. MURPHY ◽  
STANLEY A. CHIN-BING
Keyword(s):  
Boundary Conditions ◽  
Heterogeneous Media ◽  
Plane Waves ◽  
Reflection Coefficients ◽  
Radiation Boundary Conditions ◽  
Media Comparison ◽  
Acoustic Media ◽  
Radiation Boundary ◽  
Radiation Conditions ◽  
Effective Reflection Coefficient

Several radiation boundary conditions for inhomogeneous acoustic media are investigated. Previous investigators have developed various approximate radiation conditions and have studied their accuracy by calculating an effective reflection coefficient for plane waves incident on such radiating boundaries. In this paper, it is shown that effective reflection coefficients can be calculated for a class of parabolic approximations to the Helmholtz equation. These results are valid for vertically heterogeneous media. Comparison of these radiation conditions is given through numerical examples.

Media Comparison of Aggression: Reality Versus Dramatic TV

2006 ◽  
Author(s):  
Tressa Mallamo ◽  
Sharon E. Gay ◽  
Krista Kumley ◽  
Hilary Anton-Stang ◽  
William J. Szlemko ◽  
...  
Keyword(s):  
Media Comparison

Designing Time Delay Compensation Methods for Functional Modes Using Sensory Evaluation

2015 ◽  
Vol 135 (7) ◽  
pp. 755-764 ◽  
Author(s):  
Shuhei Shimizu ◽  
Yoshiki Ohno ◽  
Takahiro Nozaki ◽  
Kouhei Ohnishi
Keyword(s):  
Time Delay ◽  
Sensory Evaluation ◽  
Delay Compensation ◽  
Compensation Methods ◽  
Time Delay Compensation
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