A5023397334- Automotive and Human Injury Biomechanics
- Elasticity and Material Modeling
- Numerical methods in engineering
- Aortic aneurysm repair treatments
- Medical Image Segmentation Techniques
- Medical Imaging and Analysis
- Cardiac, Anesthesia and Surgical Outcomes
- Fluid Dynamics Simulations and Interactions
- Medical Imaging Techniques and Applications
- Advanced MRI Techniques and Applications
- Anatomy and Medical Technology
- 3D Shape Modeling and Analysis
- Lattice Boltzmann Simulation Studies
- Transportation Safety and Impact Analysis
- Traumatic Brain Injury and Neurovascular Disturbances
- Advanced Neuroimaging Techniques and Applications
- Advanced Numerical Methods in Computational Mathematics
- Soft Robotics and Applications
- Aortic Disease and Treatment Approaches
- Traumatic Brain Injury Research
- Traffic and Road Safety
- Functional Brain Connectivity Studies
- Advanced Numerical Analysis Techniques
- Rock Mechanics and Modeling
- Cerebrospinal fluid and hydrocephalus
The University of Western Australia
2015-2024
University Hospital Bonn
2024
Biomechanics Institute of Valencia
2019
Auckland University of Technology
2019
University of Auckland
2019
Intelligent Systems Research (United States)
2019
Goethe University Frankfurt
2013
Frankfurt University of Applied Sciences
2012
Japan Automobile Research Institute
2000-2003
Toyota Motor Corporation (Switzerland)
2003
Abstract We propose an efficient numerical algorithm for computing deformations of ‘very’ soft tissues (such as the brain, liver, kidney etc.), with applications to real‐time surgical simulation. The is based on finite element method using total Lagrangian formulation, where stresses and strains are measured respect original configuration. This choice allows pre‐computing most spatial derivatives before commencement time‐stepping procedure. used explicit time integration that eliminated need...
Twelve male volunteers participated in this study. They sat on a seat mounted newly developed sled that simulated actual car impact acceleration. Impact speeds (4, 6 and 8 km/h), stiffness, neck muscle tension, cervical spine alignment were selected for the parameter study of head-neck-torso kinematics responses. The motion patterns vertebrae crash normal compared. Subject's muscles relaxed state did not affect upon rear-end impact. ramping-up subject's torso was observed due to seatback...
Abstract A method is presented for computing deformation of very soft tissue. The motivated by the need simple, automatic model creation real‐time simulation. meshless in sense that calculated at nodes are not part an element mesh. Node placement almost arbitrary. Fully geometrically nonlinear Total Lagrangian formulation used. Geometric integration performed over a regular background grid does conform to simulation geometry. Explicit time used via central difference method. As example...
Abstract An abdominal aortic aneurysm (AAA) is a permanent and irreversible dilation of the lower region aorta. It symptomless condition that, if left untreated, can expand until rupture. Despite ongoing efforts, an efficient tool for accurate estimation AAA rupture risk still not available. Furthermore, lack standardisation across current approaches specific obstacles within computational workflows limit translation existing methods to clinic. This paper presents BioPARR (Biomechanics based...
Abstract In this review paper we discuss Intelligent Systems for Medicine Laboratory's contributions to mathematical and numerical modelling of brain deformation behaviour neurosurgical simulation image registration. These processes can be reasonably described in purely mechanical terms, such as displacements, strains stresses therefore analysed using established methods continuum mechanics. We advocate the use fully non‐linear theory some detail geometry, boundary conditions, loading...
Abdominal aortic aneurysm (AAA) is a life-threatening condition involving the permanent dilation of aorta, often detected incidentally through imaging for some other condition. The standard clinical approach to managing AAA follows one-size-fits-all model based on size and growth rate, leading underestimation or overestimation rupture risk in individual patients. widely studied stress-based estimation using computational biomechanics requires wall strength information. However, non-invasive...
Dynamic Relaxation is an explicit method that can be used for computing the steady state solution a discretised continuum mechanics problem. The convergence speed of depends on accurate estimation parameters involved, which especially difficult nonlinear problems. In this paper we propose completely adaptive in are updated during iteration process, converging to their optimal values. We use proposed intra-operative organ deformations using non-linear finite element models involving large...
Abstract To obtain a very fast solution for finite element models used in surgical simulations, low‐order elements, such as the linear tetrahedron or under‐integrated hexahedron, must be used. Automatic hexahedral mesh generation complex geometries remains challenging problem, and therefore tetrahedral mixed meshes are often necessary. Unfortunately, standard formulation of exhibits volumetric locking case almost incompressible materials. In this paper, we extend average nodal pressure (ANP)...
Computation of soft tissue mechanical responses for surgery simulation and image-guided has been dominated by the finite element (FE) method that utilises a mesh interconnected elements as computational grid. Shortcomings such mesh-based discretisation in modelling surgical cutting include high cost need re-meshing vicinity cutting-induced discontinuity. The meshless total Lagrangian adaptive dynamic relaxation (MTLADR) algorithm we present here does not exhibit shortcomings, it relies on...