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Théorie géométrique de la diffraction appliquée à la caractérisation expérimentale des propriétés acoustiques et dimensionnelles de la diaphyse osseuse

Abstract : This thesis aims to study an instrumental approach for the dimensional and acoustical characterization of cortical bone and medullar cavity. The Theory of Geometrical Diffraction is used, for both pulse echo and transmission mode. This theory is applied to a cylindrical model and only needs to know the phase delay between transmitted and reflected echoes from bone. This approach is evaluated by some simulations. The theoretical prediction of the echoes arriving time is experimentally verified. The solution of the inverse problem is validated on Plexiglas and Duraluminium phantom and in vitro with bovine bone. The measurements uncertainties are analysed too. The whole results are promising. The acoustical celerity are in keeping with reference data. The external and internal dimensions found follow the real boundary of the diaphysis in a satisfactory way.
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Theses
File URL :
http://docnum.univ-lorraine.fr/prive/SCD_T_2000_0130_DETTI.pdf
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https://hal.univ-lorraine.fr/tel-01746489
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Submitted on : Thursday, March 29, 2018 - 10:38:55 AM
Last modification on : Monday, January 11, 2021 - 10:50:21 AM

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  • HAL Id : tel-01746489, version 1

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Valérie Detti. Théorie géométrique de la diffraction appliquée à la caractérisation expérimentale des propriétés acoustiques et dimensionnelles de la diaphyse osseuse. Médecine humaine et pathologie. Université Henri Poincaré - Nancy 1, 2000. Français. ⟨NNT : 2000NAN10130⟩. ⟨tel-01746489⟩

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