Scattering by a fluid cylinder in a porous medium: application to trabecular bone.
In a trabecular bone, considered as a nondissipative porous medium, the scattering of an incident wave by cylindrical pores larger than the wavelength is studied. The goal is to know if scattering alone may cause such a high attenuation as that observed in calcaneus. The porous medium is modelized via Biot's theory and the scattering by a single pore is characterized from the definition of a scattering matrix. An approximation of weakly disordered medium is then discussed to estimate the effective attenuation and dispersion as a function of frequency. These effective properties are shown to be different of those measured on calcaneus, due to the neglect of wave conversions during the scattering process.
Luppé
Francine
F
Laboratoire d'Acoustique Ultrasonore et d'Electronique, UMR 6068, Université du Havre, France.
Conoir
Jean-Marc
JM
Franklin
Hervé
H
D002111:Calcaneus / Q000000981:diagnostic imaging*; D006801:Humans; D008433:Mathematics; D016062:Porosity; D012542:Scattering, Radiation; D014463:Ultrasonography