Bayesian Inference of Human Bone Sample Properties Using Ultrasonic Reflected Waves
Résumé
The non-intrusiveness and low cost of ultrasonic interrogation is motivating the development of new means towards the detection of osteoporosis and other bone deciencies. Bone is a porous media saturated with a viscous fluid, and could thus be well characterized by the Biot model. The main purpose of this work is to present an in vitro methodology for the identication of the properties and structural parameters of the bone, adopting a statistical Bayesian inference technique using ultrasonic reected signals at normal incidence. It is, in this respect, a companion paper to a previous work [J. Acoust. Soc. Am. 146, 3 (2019), pp. 1629-1640], where ultra-sonic transmitted signals were considered. This approach allows the retrieval of some important parameters characterizing the bone structure and associated uncertainties. The method was applied to seven samples of bone extracted from femoral heads, immersed in water and exposed to ultrasonic signals with a center frequency of ≈ 500 kHz. For all seven samples, signals at dierent sites were acquired to check the method robustness. The porosity, pore mean size and standard deviation and the porous frame bulk modulus were all successfully identied using only ultra-sonic reected signals.
Domaines
Acoustique [physics.class-ph]
Origine : Fichiers produits par l'(les) auteur(s)