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2007 Proceedings of the Second International Conference on Computer Graphics Theory and Applications   unpublished
We also present intuitive real-time interaction techniques for picking, pushing and cutting objects simulated using meshless deformation based on shape matching.  ...  In this paper we introduce improvements to the technique that increase physical realism and make it more suitable for use in interactive real-time environments such as games and virtual surgery applications  ...  Furthermore advanced interactions are required for many applications such as virtual surgery IMPROVED MESHLESS DEFORMATION TECHNIQUES FOR REAL-TIME INTERACTIVE COLLABORATIVE ENVIRONMENTS simulations.  ... 
doi:10.5220/0002085501540161 fatcat:is5ecwwkyfc2pacc37una4fegu

Improved Meshless Deformation Techniques for Plausible Interactive Soft Object Simulations [chapter]

Alex Henriques, Burkhard Wünsche
2008 Communications in Computer and Information Science  
We also present intuitive real-time interaction techniques for picking, pushing and cutting objects simulated using meshless deformation based on shape matching.  ...  In this paper we introduce improvements to the technique that increase physical realism and make it more suitable for use in interactive real-time environments such as games and virtual surgery applications  ...  Suitability for Real-Time Collaborative Interactive Environments We identified a range of criteria which a soft object simulation technique for real-time interactive collaborative environments, such as  ... 
doi:10.1007/978-3-540-89682-1_7 fatcat:dfy4xelrwzgudmcrh7vvr4hwga

Surgical Modelling, Simulation and Education

2007 International Journal of Computer Assisted Radiology and Surgery  
We have investigated the use of meshless deformation based on shape matching for soft tissue simulation and we implemented several improvements which make the simulation more accurate and stable.  ...  Novel interaction techniques such as fast, interactive cutting, pushing and picking are introduced.  ...  Conclusion Meshless deformation based on shape matching is a promising technique for use in interactive and collaborative virtual surgery environments.  ... 
doi:10.1007/s11548-007-0091-7 fatcat:tebqstfodnaqzhpifoyvndkw5u

VOXAR Labs - augmenting experiences for a better life

Veronica Teichrieb, The VOXAR Labs Team
2011 Journal of Interactive Systems  
It develops and transfers technology related to visualization, tracking and natural interaction techniques focusing augmented reality in multi-disciplinary application domains.  ...  It has been developed a simulation of point-based deformable objects in real time, through a meshless technique called Point Based Animation.  ...  This technique will allow automatic initialization and recovery from failures along with improved accuracy and robustness.  ... 
doi:10.5753/jis.2011.589 fatcat:6cwsbeoyj5gstmaye6sfmjtlki

Biomechanical modeling and computer simulation of the brain during neurosurgery [article]

K. Miller, G. R. Joldes, G. Bourantas, S. K. Warfield, D. E. Hyde, R. Kikinis, A. Wittek
2019 arXiv   pre-print
We discuss finite element and meshless domain discretization, the use of the Total Lagrangian formulation of continuum mechanics, and explicit time integration for solving both time-accurate and steady  ...  We present two examples to showcase these methods: brain shift estimation for image registration and brain deformation computation for neuronavigation in epilepsy treatment.  ...  We thank the Raine Medical Research Foundation for funding G. R. Joldes through a Raine Priming Grant, and the Department of Health, Western Australia, for funding G. R. Joldes through a Merit Award.  ... 
arXiv:1904.01192v1 fatcat:w6l3a6mimjejdo4m5xjdw7lhw4

Suite of Meshless Algorithms for Accurate Computation of Soft Tissue Deformation for Surgical Simulation [article]

Grand Joldes, George Bourantas, Benjamin Zwick, Habib Chowdhury, Adam Wittek, Sudip Agrawal, Konstantinos Mountris, Damon Hyde, Simon K. Warfield, Karol Miller
2019 arXiv   pre-print
and for numerical computations of soft tissue deformation, a novel way of imposing EBC for explicit time integration, and an adaptive numerical integration procedure within the Meshless Total Lagrangian  ...  The ability to predict patient-specific soft tissue deformations is key for computer-integrated surgery systems and the core enabling technology for a new era of personalized medicine.  ...  We would like to thank The University of Western Australia for supporting the collaboration with Harvard Medical School through the Research Collaboration Award.  ... 
arXiv:1903.04760v1 fatcat:ujcmn4awsfd73lbfcg2s5sziue

LApIS: developing research applied to health care area

Fátima L S Nunes, Helton H Bíscaro, Márcio E Delamaro, Romero Tori, Ricardo Nakamura
2011 Journal of Interactive Systems  
All the projects developed at LApIS have some relevant aspects for researches in the graphics area, which can become new opportunities for student's integration and new collaborations.  ...  to the health care area, although many of the techniques and tools extrapolate this application scope. .  ...  Some current works related to this project are: realism in relation to visualization, methods for providing precise collision detection in real time, realistic deformation of complex objects, use of serious  ... 
doi:10.5753/jis.2011.582 fatcat:cfwsou2svjcoxckxbh2qcch4re

Haptic rendering - beyond visual computing - Haptics in minimally invasive surgical simulation and training

C. Basdogan, S. De Rensselaer, Jung Kim, M. Muniyandi, Hyun Kim, M.A. Srinivasan
2004 IEEE Computer Graphics and Applications  
models that respond to user interactions in real time during simulation sessions.  ...  I Haptic playback-We've developed user interaction techniques based on force feedback to guide a user during a training session.  ...  We thank the anonymous reviewers for their insightful comments that helped us improve the article's quality.  ... 
doi:10.1109/mcg.2004.1274062 pmid:15387229 fatcat:2ntogdb7hfgk3e3pzznajk2roa

Graphic and haptic modelling of the oesophagus for VR-based medical simulation

Changmok Choi, Jungsik Kim, Hyonyung Han, Bummo Ahn, Jung Kim
2009 International Journal of Medical Robotics and Computer Assisted Surgery  
This paper describes the modelling of an oesophagus for a real-time laparoscopic surgical simulator.  ...  Among the many technical components of the simulators, realistic and interactive organ modelling stands out as a key issue for judging the fidelity of the simulation.  ...  Environment mapping is an efficient technique used to compute the reflection vectors without adding real-time computations.  ... 
doi:10.1002/rcs.256 pmid:19444793 fatcat:uh63ompxpjgn5lflywitzjare4

Virtual Reality Based Simulation of Hysteroscopic Interventions

M. Harders, D. Bachofen, M. Grassi, M. Bajka, U. Spaelter, M. Teschner, B. Heidelberger, R. Sierra, D. Steinemann, S. Tuchschmid, J. Zatonyi, G. Székely
2008 Presence - Teleoperators and Virtual Environments  
Therefore, we try to tackle this situation with a reference surgical simulator of the highest possible fidelity for procedural training.  ...  Our framework allows the rehearsal of several aspects of hysteroscopy-for instance, correct fluid management, handling of excessive bleeding, appropriate removal of intrauterine tumors, or the use of the  ...  Finally, the application of promising alternatives to currently used techniques will be exam-ined, for example, the usage of meshless representations for deformation models.  ... 
doi:10.1162/pres.17.5.441 fatcat:dl7zehowxzfqtetfbcprynxel4

Towards the Virtual Physiological Human [article]

Nadia Magnenat-Thalmann, Benjamin Gilles, Hervé Delingette, Andrea Giachetti, Marco Agus
2007 Eurographics State of the Art Reports  
We will focus on the computer graphics aspects involved in medical modelling/ simulation: deformable model-based segmentation, mesh optimisation, data fusion, interactive mechanical simulation, cost-efficient  ...  Human body representations have been used for centuries to help in understanding and documenting the shape and function of its compounding parts.  ...  Real Time Deformation The real-time deformation of soft tissue is an important constraint for medical virtual reality systems.  ... 
doi:10.2312/egt.20071062 fatcat:iyybqfp4nnadhfkaeagp6qr63q

CamiTK: A Modular Framework Integrating Visualization, Image Processing and Biomechanical Modeling [chapter]

Céline Fouard, Aurélien Deram, Yannick Keraval, Emmanuel Promayon
2012 Studies in Mechanobiology, Tissue Engineering and Biomaterials  
The MML extension is then presented: it is an environment for comparing and evaluating soft-tissue simulation models and algorithms.  ...  Specifically designed as a soft-tissue simulation benchmark and a reference database for validation, it can compare models and algorithms built from different modeling techniques or biomechanical software  ...  CamiTK was build over many years and we wish to thank all the students, PhD students, researchers and engineers for their work.  ... 
doi:10.1007/8415_2012_118 fatcat:xe23hyo4szfz7ouhpgj5zlhbgq

Multi-Modal Sensing and Robotic Manipulation of Non-Rigid Objects: A Survey

Félix Nadon, Angel Valencia, Pierre Payeur
2018 Robotics  
Formal representations considered to predict the deformation resulting from manipulation of non-rigid objects are then investigated.  ...  This technique allows them to avoid the need for prior knowledge and modelling of the object while explicitly controlling the object's elastic deformation through real-time visual servoing.  ...  As the robot navigates the environment, it interacts with surrounding objects to estimate their deformation properties and takes them into account when building a model of the environment.  ... 
doi:10.3390/robotics7040074 fatcat:iqztgxmo5vezzdwkjtpn5zvdr4

Precomputation-Based Rendering

Ravi Ramamoorthi
2007 Foundations and Trends in Computer Graphics and Vision  
On the other hand, real-time rendering often fixes the object geometry and other attributes, such as relighting a static image for lighting design.  ...  We can therefore precompute offline solutions to each individual light or lighting basis function, combining them efficiently for real-time image synthesis.  ...  I started to work on spherical harmonics and real-time rendering during my PhD at Stanford University with Pat Hanrahan, to whom I owe a significant debt.  ... 
doi:10.1561/0600000021 fatcat:lruiwpvi75bevf5ietum5cn33q

GPUs, a New Tool of Acceleration in CFD: Efficiency and Reliability on Smoothed Particle Hydrodynamics Methods

Alejandro C. Crespo, Jose M. Dominguez, Anxo Barreiro, Moncho Gómez-Gesteira, Benedict D. Rogers, Jörg Langowski
2011 PLoS ONE  
The GPU parallelisation technique uses the Compute Unified Device Architecture (CUDA) of nVidia devices.  ...  In this paper, as part of a dual-functioning code for either central processing units (CPUs) or Graphics Processor Units (GPUs), a parallelisation using GPUs is presented.  ...  Of the meshless techniques now available, smoothed particle hydrodynamics (SPH) is proving popular and robust.  ... 
doi:10.1371/journal.pone.0020685 pmid:21695185 pmcid:PMC3113801 fatcat:d7ycemp3b5bjrhtsqoyaiof3vq
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