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From high-resolution CT data to finite element models: development of an integrated modular framework

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  • Dieter H. Pahr
  • Philippe K. Zysset

Abstract

New ideas for the extraction of finite element (FE) models from high-resolution computed tomography datasets are presented. The multi-step approach starts with a 3D region-growing algorithm in order to extract the outer voxel based iso-surface. This information is used to compute a voxel model of the cortical shell. The next step provides triangulated surfaces of the outer bone contour. Three-dimensional deformable models using a gradient vector flow and a multi-level mesh resampling are used. These meshes are self-regularising and of high quality. A further step contains a new self correcting cortical shell thickness evaluation algorithm, which results in topological conform smooth inner and outer compact bone iso-surface meshes. Such iso-surfaces can be used for numerically efficient FE models, which are of bio-mechanical and clinical importance. Details of the approach are described and applications with respect to a human proximal femur and vertebral body are shown.

Suggested Citation

  • Dieter H. Pahr & Philippe K. Zysset, 2009. "From high-resolution CT data to finite element models: development of an integrated modular framework," Computer Methods in Biomechanics and Biomedical Engineering, Taylor & Francis Journals, vol. 12(1), pages 45-57.
    • Handle: RePEc:taf:gcmbxx:v:12:y:2009:i:1:p:45-57
    DOI: 10.1080/10255840802144105
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    Cited by:

    1. Marco Piccinini & Joel Cugnoni & John Botsis & Giovanna Zacchetti & Patrick Ammann & Anselm Wiskott, 2014. "Factors affecting subject-specific finite element models of implant-fitted rat bone specimens: critical analysis of a technical protocol," Computer Methods in Biomechanics and Biomedical Engineering, Taylor & Francis Journals, vol. 17(13), pages 1403-1417, October.

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