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3D analysis from micro-MRI during in situ compression on cancellous bone.

Article dans une revue avec comité de lecture
Author
BENOIT, Aurélie
GILLET, Brigitte
440 Institut de Chimie des Substances Naturelles [ICSN]
GUILLOT, Geneviève
167945 Imagerie par Résonance Magnétique Médicale et Multi-Modalités [IR4M]
HILD, François
1306 Laboratoire de Mécanique et Technologie [LMT]
MITTON, David
PERIE, Jean Noël
1306 Laboratoire de Mécanique et Technologie [LMT]
ROUX, Stéphane
1306 Laboratoire de Mécanique et Technologie [LMT]
ccGUÉRARD, Sandra
99538 Laboratoire de biomécanique [LBM]

URI
http://hdl.handle.net/10985/7387
DOI
10.1016/j.jbiomech.2009.06.034
Date
2009
Journal
Journal of Biomechanics

Abstract

A mini-compression jig was built to perform in situ tests on bovine trabecular bone monitored by micro-MRI. The MRI antenna provided an isotropic resolution of 78 microm that allows for a volume correlation method to be used. Three-dimensional displacement fields are then evaluated within the bone sample during the compression test. The performances of the correlation method are evaluated and discussed to validate the technique on trabecular bone. By considering correlation residuals and estimates of acquisition noise, the measured results are shown to be trustworthy. By analyzing average strain levels for different interrogation volumes along the loading direction, it is shown that the sample size is less than that of a representative volume element. This study shows the feasibility of the 3D-displacement and strain field analyses from micro-MRI images. Other biological tissues could be considered in future work.

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