3D analysis from micro-MRI during in situ compression on cancellous bone.
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.
Benoit
Aurélie
A
Arts et Metiers ParisTech, CNRS, LBM, 151 bd de l'Hopital, 75013 Paris, France.
Guérard
Sandra
S
Gillet
Brigitte
B
Guillot
Geneviève
G
Hild
François
F
Mitton
David
D
Périé
Jean-Noël
JN
Roux
Stéphane
S
D000818:Animals; D002417:Cattle; D019245:Compressive Strength / Q000502:physiology; D003198:Computer Simulation; D055119:Elastic Modulus / Q000502:physiology; D005240:Feasibility Studies; D005270:Femur Head / Q000166:cytology* / Q000502:physiology*; D007090:Image Interpretation, Computer-Assisted / Q000379:methods*; D021621:Imaging, Three-Dimensional / Q000379:methods*; D066298:In Vitro Techniques; D008279:Magnetic Resonance Imaging / Q000379:methods*; D008954:Models, Biological; D013314:Stress, Mechanical