Acoustic wave propagation in bovine cancellous bone: application of the Modified Biot-Attenborough model.
Acoustic wave propagation in bovine cancellous bone is experimentally and theoretically investigated in the frequency range of 0.5-1 MHz. The phase velocity, attenuation coefficient, and broadband ultrasonic attenuation (BUA) of bovine cancellous bone are measured as functions of frequency and porosity. For theoretical estimation, the Modified Biot-Attenborough (MBA) model is employed with three new phenomenological parameters: the boundary condition, phase velocity, and impedance parameters. The MBA model is based on the idealization of cancellous bone as a nonrigid porous medium with circular cylindrical pores oriented normal to the surface. It is experimentally observed that the phase velocity is approximately nondispersive and the attenuation coefficient linearly increases with frequency. The MBA model predicts a slightly negative dispersion of phase velocity linearly with frequency and the nonlinear relationships of attenuation and BUA with porosity. The experimental results are in good agreement with the theoretical results estimated with the MBA model. It is expected that the MBA model can be usefully employed in the field of clinical bone assessment for the diagnosis of osteoporosis.
Lee
Kang Il
KI
Acoustics Research Laboratory, BK21 Physics Research Division, Department of Physics, SungKyunKwan University, Suwon 440-746, Republic of Korea.
Roh
Heui-Seol
HS
Yoon
Suk Wang
SW
D000818:Animals; D001844:Bone Conduction / Q000502:physiology*; D015519:Bone Density / Q000502:physiology; D001857:Bone Matrix / Q000503:physiopathology; D001842:Bone and Bones / Q000503:physiopathology; D002417:Cattle; D008838:Microcomputers; D008962:Models, Theoretical; D010024:Osteoporosis / Q000000981:diagnostic imaging* / Q000503:physiopathology; D012815:Signal Processing, Computer-Assisted / Q000295:instrumentation*; D014159:Transducers; D014463:Ultrasonography / Q000295:instrumentation*