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    Applying DTI white matter orientations to finite element head models to examine diffuse TBI under high rotational accelerations.

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    Authors
    Colgan, Niall C
    Gilchrist, Michael D
    Curran, Kathleen M
    Affiliation
    Diagnostic Imaging, University College Dublin, Belfield D4, Ireland. kathleen.curran@ucd.ie
    Issue Date
    2010-12
    MeSH
    Acceleration
    Anisotropy
    Brain Injuries
    Diffusion Tensor Imaging
    Elastic Modulus
    Finite Element Analysis
    Head
    Humans
    Models, Biological
    Nonlinear Dynamics
    Rotation
    Trauma Severity Indices
    Viscosity
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    Citation
    Applying DTI white matter orientations to finite element head models to examine diffuse TBI under high rotational accelerations. 2010, 103 (2-3):304-9 Prog. Biophys. Mol. Biol.
    Journal
    Progress in biophysics and molecular biology
    URI
    http://hdl.handle.net/10147/129571
    DOI
    10.1016/j.pbiomolbio.2010.09.008
    PubMed ID
    20869383
    Abstract
    The in-vivo mechanical response of neural tissue during impact loading of the head is simulated using geometrically accurate finite element (FE) head models. However, current FE models do not account for the anisotropic elastic material behaviour of brain tissue. In soft biological tissue, there is a correlation between internal microscopic structure and macroscopic mechanical properties. Therefore, constitutive equations are important for the numerical analysis of the soft biological tissues. By exploiting diffusion tensor techniques the anisotropic orientation of neural tissue is incorporated into a non-linear viscoelastic material model for brain tissue and implemented in an explicit FE analysis. The viscoelastic material parameters are derived from published data and the viscoelastic model is used to describe the mechanical response of brain tissue. The model is formulated in terms of a large strain viscoelastic framework and considers non-linear viscous deformations in combination with non-linear elastic behaviour. The constitutive model was applied in the University College Dublin brain trauma model (UCDBTM) (i.e. three-dimensional finite element head model) to predict the mechanical response of the intra-cranial contents due to rotational injury.
    Item Type
    Article
    Language
    en
    ISSN
    1873-1732
    ae974a485f413a2113503eed53cd6c53
    10.1016/j.pbiomolbio.2010.09.008
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