Subject-specific biomechanical simulation of brain indentation using a meshless method

We develop a meshless method for simulating soft organ deformation. The method is motivated by simple, automatic model creation for real-time simulation. Our method is meshless in the sense that deformation is calculated at nodes that are not part of an element mesh. Node placement is almost arbitra...

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Bibliographic Details
Published inMedical image computing and computer-assisted intervention : MICCAI ... International Conference on Medical Image Computing and Computer-Assisted Intervention Vol. 10; no. Pt 1; p. 541
Main Authors Horton, Ashley, Wittek, Adam, Miller, Karol
Format Journal Article
LanguageEnglish
Published Germany 2007
Subjects
Animals
Biomechanical Phenomena - methods
Brain - physiology
Brain - surgery
Computer Simulation
Elasticity
Finite Element Analysis
Hardness
Models, Neurological
Physical Stimulation - methods
Stress, Mechanical
Swine
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Summary:We develop a meshless method for simulating soft organ deformation. The method is motivated by simple, automatic model creation for real-time simulation. Our method is meshless in the sense that deformation is calculated at nodes that are not part of an element mesh. Node placement is almost arbitrary. Fully geometrically nonlinear total Lagrangian formulation is used. Geometric integration is performed over a regular background grid that does not conform to the simulation geometry. Explicit time integration is used via the central difference method. To validate the method we simulate indentation of a swine brain and compare the results to experimental data.