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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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References

Figures

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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)
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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.
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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.
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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.
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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.
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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).
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The same as Fig. 2, but now comparing the result from the μCT165 models with those of the μCT56 models
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The same as Fig. 3, but now comparing the results from the μCT165 models with those of the μCT56 models
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The same as Fig. 4, but now comparing the results from the μCT165 models with those of the μCT56 models
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The same as Fig. 5, but now comparing the results from the μCT165 models with those of the μCT56 models
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The same as Fig. 6, but now comparing the results from the μCT165 models with those of the μCT56 models

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