Download or read book Geometrically and Physically Based Modeling for Deformable Objects Simulating Soft Tissue Interactions in Surgery Environments written by Sukitti Punak and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: ABSTRACT: This dissertation contributes a method for modeling deformable objects that leverages computer graphics techniques and state-of-the-art hardware to simulate and visualize deformations, including topological transformations like cutting, in real time. The resulting models are suitable for interactive surgical simulation for illustration and teaching purposes. The approach has been tested, in particular, by modeling responsive fatty tissue. To support force feedback as well as visual feedback, the deformable object consists of three closely coupled representations for dynamic response, collision detection, and visualization. All three representations are implemented on the Graphics Processing Unit, rather than on the CPU, to leverage parallelism for speed.
Download or read book Finite Element Method Simulation of 3D Deformable Solids written by Eftychios Sifakis and published by Morgan & Claypool Publishers. This book was released on 2015-10-01 with total page 71 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book serves as a practical guide to simulation of 3D deformable solids using the Finite Element Method (FEM). It reviews a number of topics related to the theory and implementation of FEM approaches: measures of deformation, constitutive laws of nonlinear materials, tetrahedral discretizations, and model reduction techniques for real-time simulation. Simulations of deformable solids are important in many applications in computer graphics, including film special effects, computer games, and virtual surgery. The Finite Element Method has become a popular tool in many such applications. Variants of FEM catering to both offline and real-time simulation have had a mature presence in computer graphics literature. This book is designed for readers familiar with numerical simulation in computer graphics, who would like to obtain a cohesive picture of the various FEM simulation methods available, their strengths and weaknesses, and their applicability in various simulation scenarios. The book is also a practical implementation guide for the visual effects developer, offering a lean yet adequate synopsis of the underlying mathematical theory. Chapter 1 introduces the quantitative descriptions used to capture the deformation of elastic solids, the concept of strain energy, and discusses how force and stress result as a response to deformation. Chapter 2 reviews a number of constitutive models, i.e., analytical laws linking deformation to the resulting force that has successfully been used in various graphics-oriented simulation tasks. Chapter 3 summarizes how deformation and force can be computed discretely on a tetrahedral mesh, and how an implicit integrator can be structured around this discretization. Finally, chapter 4 presents the state of the art in model reduction techniques for real-time FEM solid simulation and discusses which techniques are suitable for which applications. Topics discussed in this chapter include linear modal analysis, modal warping, subspace simulation, and domain decomposition.
Download or read book Surgery Simulation and Soft Tissue Modeling written by Nicholas Ayache and published by Springer Science & Business Media. This book was released on 2003-06-04 with total page 398 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book constitutes the refereed proceedings of the International Symposium on Surgery Simulation and Soft Tissue Modeling, IS4TM 2003, held in Juan-Les-Pins, France in June 2003. The 33 revised full papers presented together with 3 invited papers were carefully reviewed and selected from 45 submissions. The papers are organized in topical sections on soft tissue models, haptic rendering, cardiac modeling, and patient specific simulators.
Download or read book Graphical Simulation of Deformable Models written by Jianping Cai and published by Springer. This book was released on 2016-12-20 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book covers dynamic simulation of deformable objects, which is one of the most challenging tasks in computer graphics and visualization. It focuses on the simulation of deformable models with anisotropic materials, one of the less common approaches in the existing research. Both physically-based and geometrically-based approaches are examined. The authors start with transversely isotropic materials for the simulation of deformable objects with fibrous structures. Next, they introduce a fiber-field incorporated corotational finite element model (CLFEM) that works directly with a constitutive model of transversely isotropic material. A smooth fiber-field is used to establish the local frames for each element. To introduce deformation simulation for orthotropic materials, an orthotropic deformation controlling frame-field is conceptualized and a frame construction tool is developed for users to define the desired material properties. The orthotropic frame-field is coupled with the CLFEM model to complete an orthotropic deformable model. Finally, the authors present an integrated real-time system for animation of skeletal characters with anisotropic tissues. To solve the problems of volume distortion and high computational costs, a strain-based PBD framework for skeletal animation is explained; natural secondary motion of soft tissues is another benefit. The book is written for those researchers who would like to develop their own algorithms. The key mathematical and computational concepts are presented together with illustrations and working examples. It can also be used as a reference book for graduate students and senior undergraduates in the areas of computer graphics, computer animation, and virtual reality. Academics, researchers, and professionals will find this to be an exceptional resource.
Download or read book Heterogeneous Deformable Object Modeling for Medical Surgical Simulation and Collaborative Product Development with Haptic Interfaces written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This research focuses on the investigation of heterogeneous deformable object modeling, physically based simulation, haptic force rendering and collaborative techniques for medical surgical simulation, virtual prototyping and collaborative product development. Heterogeneous deformable models can be used to present internal geometric structures and different material properties of biological tissues and other soft-material objects for many Virtual Reality (VR) systems like surgical simulators. Cutting simulation is an important component of VR systems to modify the topology of deformable models. In this paper, a tri-ray node snapping algorithm is presented to generate volumetric heterogeneous mass spring models from a set of interface surfaces between different materials of deformable objects. A constrained local static integration method is proposed to quickly find the equilibrium solution of physically-based deformation behaviors. A 3D node snapping algorithm is developed to implement the topology modification on heterogeneous deformable models. Smooth cut is generated directly by duplicating and displacing mass points that are snapped along cutting planes. Sets of triangular surfaces representing different soft tissues are generated along the new cut to present internal geometric structures and corresponding material properties. A quasi-static algorithm is presented to refine the mesh in the vicinity of new cuts. A lab-built 6-DOF (degree of freedom) input and 5-DOF output haptic interface system is integrated with the developed system to provide force-torque feedback to users. The marriage of network collaborative technology and the proposed deformable object modeling and simulation techniques has a great potential for more extensive applications. Challenges such as heavy computation and data synchronization exist when integrating heterogeneous deformable object models and haptic interfaces with collaborative VR systems. To balance the computational burden of hap.
Download or read book Real time Knowledge based Fuzzy Logic Model for Soft Tissue Deformation written by Joey Sing Yee Tan and published by Springer. This book was released on 2019-04-06 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a real-time and knowledge-based fuzzy logic model for soft tissue deformation. The demand for surgical simulation continues to grow, as there is a major bottleneck in surgical simulation designation and every patient is unique. Deformable models, the core of surgical simulation, play a crucial role in surgical simulation designation. Accordingly, this book (1) presents an improved mass spring model to simulate soft tissue deformation for surgery simulation; (2) ensures the accuracy of simulation by redesigning the underlying Mass Spring Model (MSM) for liver deformation, using three different fuzzy knowledge-based approaches to determine the parameters of the MSM; (3) demonstrates how data in Central Processing Unit (CPU) memory can be structured to allow coalescing according to a set of Graphical Processing Unit (GPU)-dependent alignment rules; and (4) implements heterogeneous parallel programming for the distribution of grid threats for Computer Unified Device Architecture (CUDA)-based GPU computing.
Download or read book Surgery Simulation and Soft Tissue Modeling written by Nicholas Ayache and published by Springer. This book was released on 2003-08-03 with total page 398 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book constitutes the refereed proceedings of the International Symposium on Surgery Simulation and Soft Tissue Modeling, IS4TM 2003, held in Juan-Les-Pins, France in June 2003. The 33 revised full papers presented together with 3 invited papers were carefully reviewed and selected from 45 submissions. The papers are organized in topical sections on soft tissue models, haptic rendering, cardiac modeling, and patient specific simulators.
Download or read book Physically based 6 DoF Nodes Deformable Models written by Julien Bosman and published by . This book was released on 2015 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Despite the promising advances done in medical simulation, the complete virtual patient's model is yet to come. There are still many avenues for improvements, especially concerning the mechanical modeling of boundary conditions.So far, most of the work has been dedicated to organs simulation, which are generally simulated alone. This raises a real problem as the role of the surrounding organs in boundary conditions is neglected. However, these interactions can be complex, involving contacts but also mechanical links provided by layers of soft tissues known as connective tissues. As a consequence, the mutual influences between the anatomical structures are generally simplified, weakening realism of simulations.This thesis aims at studying the importance of the connective tissues, and especially of a proper modeling of the boundary conditions. To this end, the role of the ligaments during laparoscopic liver surgery has been investigated. In order to enhance the simulations' realism, a mechanical model dedicated to the connective tissues has been worked out. This has led to the development of a physically-based method relying on material points that can, not only translate, but also rotate themselves. The goal of this model is to enable the simulation of multiple organs linked by complex interactions.In addition, the work on the connective tissues model has been derived to be used in soft robotics. The principle of relying on orientable material points has been used to developed a reduced model that can reproduce the behavior of more complex structures. The objective of this work is to provide the means to control - in real-time - a soft robot made of a deformable arm.
Download or read book Medicine Meets Virtual Reality 2001 written by James D. Westwood and published by IOS Press. This book was released on 2001 with total page 632 pages. Available in PDF, EPUB and Kindle. Book excerpt: Anatomical Accuracy in Medical 3D Modeling
Download or read book Medicine Meets Virtual Reality written by James D. Westwood and published by IOS Press. This book was released on 1998 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt: Medicine is Art Medicine is supported by Science Medicine is enabled by Technology One will learn how leading-edge technology will affect the future of medical and surgical practice by improving access, quality, and continuity of care, while reducing cost. Contributors to the book are the world s leading researchers and developers in the field. Readers: Physicians, Surgeons, Information Scientists, Biomedical Professionals, Corporate Futurists, Biomechanical Engineers, Educators, Roboticists, Medical Technologists, Rehabilitation Specialists, Systems Integrators/Engineers, Psychotherapists/Behaviourists.
Download or read book A Volumetric Mesh free Deformation Method for Surgical Simulation in Virtual Environments written by and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Surgical simulation for medical training and education is increasingly perceived as a valuable supplement to traditional teaching methods. Recently, soft tissue modeling has become an important research area for surgical simulation and robot-assisted surgery. This area requires high-performance computing and advanced computer graphics algorithms. A majority of previous simulation methods in computer graphics use 2D or 3D meshes. Most of these approaches are based on mass-spring systems, the Finite Element Model (FEM), the Finite Difference Model (FDM) or Boundary Element Model (BEM). In mesh-based approaches, complex physical effects, such as melting, solidifying, splitting or fusion, pose great challenges in terms of restructuring the data set. Additionally, under large deformations the original meshes may become arbitrarily ill-conditioned. Mesh-free methods were developed to establish a system of algebraic equations for the whole domain without using a predefined mesh, which omits explicit connectivity information and thus solves many of the problems with mesh-based systems. This thesis proposes a Point-Based Volumetric Deformation Method (PBVD). It has the advantage that it is very suitable for tissue structure changes occurring merely during cutting and probing operations. Notably such topology changes are hard to handle utilizing mesh-based deformation models. PBVD is not only accurate because it preserves the physical material properties of the deformable object, such as Young's modulus and Poisson's ratio (as the FEM model does), but it is also faster than the FEM model. The PBVD method is developed based on an open-source frame work, SOFA, which is designed especially for surgical simulation, and makes it convenient to compare different deformation algorithms. Presented results show the high fidelity of the visual simulations generated by the PBVD method and its better real-time performance than FEM model.
Download or read book Physically Based Modeling and Simulation for Virtual Environment Based Surgical Training written by Suriya Natsupakpong and published by . This book was released on 2010 with total page 181 pages. Available in PDF, EPUB and Kindle. Book excerpt: Traditional medical education has relied on training with real patients in actual clinical setting under the supervision of an experienced surgeon. Novice surgeons can make mistakes that result in risks to patient safety. Computer simulation-based training has been proposed to complement traditional training to improve patient safety and surgeon efficiency and reduce cost and time. Surgical simulation allows surgeons to learn, practice and repeat surgical procedures to gain experience in a realistic and safe environment. This dissertation focuses on the development of computer-based surgical simulations. Physically based modeling is used to model deformable objects to mimic human organs in simulation. Such a simulation is composed of many simulation objects whose behaviors are represented by differential equations. The system of differential equations can be solved by using numerical integration algorithms. Moreover, physical intersections between the objects require the computation of collision detection and response between objects. This dissertation studies the determination of elasticity parameters in lumped element models, the trade-offs in numerical integration algorithms for finding the suitable numerical integration algorithms and time step size of simulation objects, and the collision detection and response algorithms for deformable objects. Improvements and extensions of the open source/open architecture GiPSi surgical simulation framework are also presented. An endoscopic third ventriculostomy simulator is constructed using the GiPSi framework as a test bed of the specific tools and methods developed.
Download or read book Soft Volume Simulation Using a Deformable Surface Model written by Sylvester Arnab and published by . This book was released on 2009 with total page 502 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings of the International Conference on Smart Materials Structures and Systems written by and published by Allied Publishers. This book was released on 1999 with total page 762 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Haptic Rendering for Simulation of Fine Manipulation written by Dangxiao Wang and published by Springer. This book was released on 2014-10-17 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book introduces the latest progress in six degrees of freedom (6-DoF) haptic rendering with the focus on a new approach for simulating force/torque feedback in performing tasks that require dexterous manipulation skills. One of the major challenges in 6-DoF haptic rendering is to resolve the conflict between high speed and high fidelity requirements, especially in simulating a tool interacting with both rigid and deformable objects in a narrow space and with fine features. The book presents a configuration-based optimization approach to tackle this challenge. Addressing a key issue in many VR-based simulation systems, the book will be of particular interest to researchers and professionals in the areas of surgical simulation, rehabilitation, virtual assembly, and inspection and maintenance.
Download or read book Biomedical Engineering and Design Handbook Volume 2 written by Myer Kutz and published by McGraw Hill Professional. This book was released on 2009-07-13 with total page 816 pages. Available in PDF, EPUB and Kindle. Book excerpt: A State-of-the-Art Guide to Biomedical Engineering and Design Fundamentals and Applications The two-volume Biomedical Engineering and Design Handbook, Second Edition, offers unsurpassed coverage of the entire biomedical engineering field, including fundamental concepts, design and development processes, and applications. This landmark work contains contributions on a wide range of topics from nearly 80 leading experts at universities, medical centers, and commercial and law firms. Volume 2 provides timely information on breakthrough developments in medical device design, diagnostic equipment design, surgery, rehabilitation engineering, prosthetics design, and clinical engineering. Filled with more than 400 detailed illustrations, this definitive volume examines cutting-edge design and development methods for innovative devices, techniques, and treatments. Volume 2 covers: Medical Product Design FDA Medical Device Requirements Cardiovascular Devices Design of Respiratory Devices Design of Artificial Kidneys Design of Controlled-Release Drug Delivery Systems Sterile Medical Device Package Development Design of Magnetic Resonance Systems Instrumentation Design for Ultrasonic Imaging The Principles of X-Ray Computed Tomography Nuclear Medicine Imaging Instrumentation Breast Imaging Systems Surgical Simulation Technologies Computer-Integrated Surgery and Medical Robotics Technology and Disabilities Applied Universal Design Design of Artificial Arms and Hands for Prosthetic Applications Design of Artificial Limbs for Lower Extremity Amputees Wear of Total Knee and Hip Joint Replacements Home Modification Design Intelligent Assistive Technology Rehabilitators Risk Management in Healthcare Technology Planning for Healthcare Institutions Healthcare Facilities Planning Healthcare Systems Engineering Enclosed Habitat Life Support
Download or read book Modeling and Simulation for Virtual Orthopaedic Surgery written by Xiaoyi Chi and published by . This book was released on 2006 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This dissertation presents a framework on developing geometrical modeling and physically based modeling methods towards a virtual reality based surgery simulation system. The development of simulation is divided into two aspects: (1) virtual bone (hard tissue) surgery, and (2) virtual soft tissue surgery...Also, this dissertation presents a study on physically based modeling and simulation of soft tissue deformation, with the goal of producing realistic, real-time effects during simulation"--Abstract, leaf iii.
