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

JOURNAL OF BIOMECHANICS

卷:42

Article

Benoit, Aurelie¹  Guerard, Sandra¹  Gillet, Brigitte²  Guillot, Genevieve³  Hild, Francois⁴  Mitton, David¹  Perie, Jean-Noel⁴  Roux, Stephane⁴ 

[1] CNRS, LBM, F-75013 Paris, France

[2] CNRS, ICSN, UPR 2301, LAb RMN Biol, F-91198 Gif Sur Yvette, France

[3] Univ Paris 11, CNRS, UMR8081, U2R2M, F-91405 Orsay, France

[4] UPMC, PRES UniverSud Paris, CNRS, LMT Cachan,ENS Cachan, F-94235 Cachan, France

关键词: 3D digital image correlation;    Mechanical characterization;    Cancellous bone;   

DOI  :  10.1016/j.jbiomech.2009.06.034

来源: Elsevier

【 摘 要 】

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 mu m 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 (C) 2009 Elsevier Ltd All rights reserved.

【 授权许可】

Free