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Approximating the acoustic reflection coefficient of lossy biological tissues
1Department of Radiology and Diagnostic Imaging, Walter C Mackenzic Health Sciences Centre, University of Alberta, Edmoñton, Canada. le@raddi.uah.ualberta.ca
Physics in Medicine and Biology
|April 1, 1997
Abstract:
The amplitude acoustic reflection coefficient of an interface between two lossy biological tissues can be approximated as Rlossy approximately Rlossless + i delta/2 where Rlossless is the lossless acoustic reflection coefficient and delta is the change in alpha/kappa (absorption coefficient per wavenumber) across the tissue interface. This approximation is shown to be valid for both normal and oblique angles of incidence.