On the unimportance of constitutive models in computing brain deformation for image-guided surgery |
| |
Authors: | Adam Wittek Trent Hawkins Karol Miller |
| |
Institution: | (1) Intelligent Systems for Medicine Laboratory, School of Mechanical Engineering, The University of Western Australia, 35 Stirling Highway, Crawley, WA, 6009, Australia |
| |
Abstract: | Imaging modalities that can be used intra-operatively do not provide sufficient details to confidently locate the abnormalities
and critical healthy areas that have been identified from high-resolution pre-operative scans. However, as we have shown in
our previous work, high quality pre-operative images can be warped to the intra-operative position of the brain. This can
be achieved by computing deformations within the brain using a biomechanical model. In this paper, using a previously developed
patient-specific model of brain undergoing craniotomy-induced shift, we conduct a parametric analysis to investigate in detail
the influences of constitutive models of the brain tissue. We conclude 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, and therefore
a simple linear elastic model for the brain tissue is sufficient. |
| |
Keywords: | Brain Constitutive models Finite element method Craniotomy-induced brain shift Displacement boundary conditions |
本文献已被 PubMed SpringerLink 等数据库收录! |
|