A QCT-Based Nonsegmentation Finite Element Head Model for Studying Traumatic Brain Injury

In the existing finite element head models (FEHMs) that are constructed from medical images, head tissues are usually segmented into a number of components according to the interior anatomical structure of the head. Each component is represented by a homogenous material model. There are a number of...

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Main Authors: Zhaoyang Liang, Yunhua Luo
Format: Article
Language:English
Published: Wiley 2015-01-01
Series:Applied Bionics and Biomechanics
Online Access:http://dx.doi.org/10.1155/2015/837585
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author Zhaoyang Liang
Yunhua Luo
author_facet Zhaoyang Liang
Yunhua Luo
author_sort Zhaoyang Liang
collection DOAJ
description In the existing finite element head models (FEHMs) that are constructed from medical images, head tissues are usually segmented into a number of components according to the interior anatomical structure of the head. Each component is represented by a homogenous material model. There are a number of disadvantages in the segmentation-based finite element head models. Therefore, we developed a nonsegmentation finite element head model with pointwise-heterogeneous material properties and corroborated it by available experiment data. From the obtained results, it was found that although intracranial pressures predicted by the existing (piecewise-homogeneous) and the proposed (pointwise-heterogeneous) FEHM are very similar to each other, strain/stress levels in the head tissues are very different. The maximum peak strains/stresses predicted by the proposed FEHM are much higher than those by the existing FEHM, indicating that piecewise-homogeneous FEHM may have underestimated the stress/strain level induced by impact and thus may be inaccurate in predicting traumatic brain injuries.
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spelling doaj-art-8603b51d1c7d4681b93778aee3e2003c2025-02-03T05:47:19ZengWileyApplied Bionics and Biomechanics1176-23221754-21032015-01-01201510.1155/2015/837585837585A QCT-Based Nonsegmentation Finite Element Head Model for Studying Traumatic Brain InjuryZhaoyang Liang0Yunhua Luo1Department of Mechanical Engineering, University of Manitoba, Winnipeg, MB, R3T 5V6, CanadaDepartment of Mechanical Engineering, University of Manitoba, Winnipeg, MB, R3T 5V6, CanadaIn the existing finite element head models (FEHMs) that are constructed from medical images, head tissues are usually segmented into a number of components according to the interior anatomical structure of the head. Each component is represented by a homogenous material model. There are a number of disadvantages in the segmentation-based finite element head models. Therefore, we developed a nonsegmentation finite element head model with pointwise-heterogeneous material properties and corroborated it by available experiment data. From the obtained results, it was found that although intracranial pressures predicted by the existing (piecewise-homogeneous) and the proposed (pointwise-heterogeneous) FEHM are very similar to each other, strain/stress levels in the head tissues are very different. The maximum peak strains/stresses predicted by the proposed FEHM are much higher than those by the existing FEHM, indicating that piecewise-homogeneous FEHM may have underestimated the stress/strain level induced by impact and thus may be inaccurate in predicting traumatic brain injuries.http://dx.doi.org/10.1155/2015/837585
spellingShingle Zhaoyang Liang
Yunhua Luo
A QCT-Based Nonsegmentation Finite Element Head Model for Studying Traumatic Brain Injury
Applied Bionics and Biomechanics
title A QCT-Based Nonsegmentation Finite Element Head Model for Studying Traumatic Brain Injury
title_full A QCT-Based Nonsegmentation Finite Element Head Model for Studying Traumatic Brain Injury
title_fullStr A QCT-Based Nonsegmentation Finite Element Head Model for Studying Traumatic Brain Injury
title_full_unstemmed A QCT-Based Nonsegmentation Finite Element Head Model for Studying Traumatic Brain Injury
title_short A QCT-Based Nonsegmentation Finite Element Head Model for Studying Traumatic Brain Injury
title_sort qct based nonsegmentation finite element head model for studying traumatic brain injury
url http://dx.doi.org/10.1155/2015/837585
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