On the unimportance of constitutive models in computing brain deformation for image-guided surgery

Adam Wittek, Trent Hawkins, Karol Miller

Research output: Contribution to journalArticle

71 Citations (Scopus)

Abstract

Imaging modalities that can be used intraoperativelydo not provide sufficient details to confidentlylocate the abnormalities and critical healthy areas that havebeen identified from high-resolution pre-operative scans.However, as we have shown in our previous work, high qualitypre-operative images can bewarped to the intra-operativeposition of the brain. This can be achieved by computingdeformations within the brain using a biomechanical model.In this paper, using a previously developed patient-specificmodel of brain undergoing craniotomy-induced shift, weconduct a parametric analysis to investigate in detail theinfluences of constitutive models of the brain tissue. Weconclude that the choice of the brain tissue constitutive model,when used with an appropriate finite deformation solution,does not affect the accuracy of computed displacements, andtherefore a simple linear elastic model for the brain tissue issufficient.
Original languageEnglish
Pages (from-to)77-84
JournalBiomechanics and Modeling in Mechanobiology
Volume8
Issue number1
DOIs
Publication statusPublished - 2009

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