Heterogeneous material mapping methods for patient-specific finite element models of pelvic trabecular bone: A convergence study

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dc.citation.firstpage1en_US
dc.citation.journalTitleMedical Engineering & Physicsen_US
dc.citation.lastpage12en_US
dc.citation.volumeNumber96en_US
dc.contributor.authorBabazadeh Naseri, Ataen_US
dc.contributor.authorDunbar, Nicholas J.en_US
dc.contributor.authorBaines, Andrew J.en_US
dc.contributor.authorAkin, John E.en_US
dc.contributor.authorHiggs, C. Fred IIIen_US
dc.contributor.authorFregly, Benjamin J.en_US
dc.date.accessioned2021-09-10T14:09:51Zen_US
dc.date.available2021-09-10T14:09:51Zen_US
dc.date.issued2021en_US
dc.description.abstractPatient-specific finite element (FE) models of bone require the assignment of heterogeneous material properties extracted from the subject's computed tomography (CT) images. Though node-based (NB) and element-based (EB) material mapping methods (MMMs) have been proposed, the sensitivity and convergence of FE models to MMM for varying mesh sizes are not well understood. In this work, CT-derived and synthetic bone material data were used to evaluate the effect of MMM on results from FE analyses. Pelvic trabecular bone data was extracted from CT images of six subjects, while synthetic data were created to resemble trabecular bone properties. The numerical convergence of FE bone models using different MMMs were evaluated for strain energy, von-Mises stress, and strain. NB and EB MMMs both demonstrated good convergence regarding total strain energy, with the EB method having a slight edge over the NB. However, at the local level (e.g., maximum stress and strain), FE results were sensitive to the field type, MMM, and the FE mesh size. The EB method exhibited superior performance in finer meshes relative to the voxel size. The NB method converged better than did the EB method for coarser meshes. These findings may lead to higher-fidelity patient-specific FE bone models.en_US
dc.identifier.citationBabazadeh Naseri, Ata, Dunbar, Nicholas J., Baines, Andrew J., et al.. "Heterogeneous material mapping methods for patient-specific finite element models of pelvic trabecular bone: A convergence study." <i>Medical Engineering & Physics,</i> 96, (2021) Elsevier: 1-12. https://doi.org/10.1016/j.medengphy.2021.07.012.en_US
dc.identifier.doihttps://doi.org/10.1016/j.medengphy.2021.07.012en_US
dc.identifier.urihttps://hdl.handle.net/1911/111352en_US
dc.language.isoengen_US
dc.publisherElsevieren_US
dc.rightsThis is an author's peer-reviewed final manuscript, as accepted by the publisher. The published article is copyrighted by Elsevier.en_US
dc.subject.keywordPelvic trabecular boneen_US
dc.subject.keywordHeterogenous materialen_US
dc.subject.keywordCT-derived elastic propertiesen_US
dc.subject.keywordDensity-stiffnessen_US
dc.subject.keywordPhantomless calibrationen_US
dc.subject.keywordPatient-specific finite element modelen_US
dc.subject.keywordMaterial mapping methoden_US
dc.titleHeterogeneous material mapping methods for patient-specific finite element models of pelvic trabecular bone: A convergence studyen_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpost-printen_US
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