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TECHNICAL PAPERS

High-Resolution Three-Dimensional-pQCT Images Can Be an Adequate Basis for In-Vivo μFE Analysis of Bone

[+] Author and Article Information
W. Pistoia, B. van Rietbergen, A. Laib, P. Rüegsegger

Institute for Biomedical Engineering, University of Zürich and Swiss Federal Institute of Technology (ETH), Moussonstrasse 18, CH-8044 Zürich, Switzerland

J Biomech Eng 123(2), 176-183 (Oct 01, 2000) (8 pages) doi:10.1115/1.1352734 History: Received December 01, 1999; Revised October 01, 2000
Copyright © 2001 by ASME
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Figures

Grahic Jump Location
Reconstructions of one of the specimens used in this study based on micro-CT images with a voxel size of 56 μm (a) and 165 μm (b) and based on images obtained from the 3D-pQCT scanner with a voxel size of 165 μm (c)
Grahic Jump Location
Young’s moduli in the three principal directions (Ex,Ey, and Ez) calculated for the 15 specimens from the μCT56 based models (horizontal axes) versus those calculated from the 3D-pQCT models (vertical axes). Correlation coefficients and regression lines are indicated in the graphs.
Grahic Jump Location
Shear moduli in the three principal directions (Gxy,Gyz, and Gzx) calculated for the 15 specimens from the μCT56 based models (horizontal axes) versus those calculated from the 3D-pQCT models (vertical axes). Correlation coefficients and regression lines are indicated in the graphs.
Grahic Jump Location
Poisson’s ratios relative to the three principal directions (vxy,vyz, and vzx) calculated for the 15 specimens from the μCT56 based models (horizontal axes) versus those calculated from the 3D-pQCT models (vertical axes). Correlation coefficients and regression lines are indicated in the graphs.
Grahic Jump Location
Average tissue von Mises stresses for a 1 percent uniaxial strain calculated from the μCT56 models (horizontal axis) versus those calculated from 3D-pQCT models (vertical axis). Correlation coefficients and regression lines are indicated in the graph.
Grahic Jump Location
Comparison of mechanical principal directions calculated from the μCT56 models with those calculated from the 3D-pQCT models. The principal directions of the μCT56 models are taken as the reference coordinate system, and the deviation of the 3D-pQCT principal directions from this reference is plotted in the polar projection plots for the principal direction (left), secondary direction (middle) and tertiary direction (right).
Grahic Jump Location
The same as Fig. 2, but now comparing the result from the μCT165 models with those of the μCT56 models
Grahic Jump Location
The same as Fig. 3, but now comparing the results from the μCT165 models with those of the μCT56 models
Grahic Jump Location
The same as Fig. 4, but now comparing the results from the μCT165 models with those of the μCT56 models
Grahic Jump Location
The same as Fig. 5, but now comparing the results from the μCT165 models with those of the μCT56 models
Grahic Jump Location
The same as Fig. 6, but now comparing the results from the μCT165 models with those of the μCT56 models

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