scholarly journals Using the PhysX engine for physics-based virtual surgery with force feedback

2009 ◽  
Vol 5 (3) ◽  
pp. 341-353 ◽  
Author(s):  
Anderson Maciel ◽  
Tansel Halic ◽  
Zhonghua Lu ◽  
Luciana P. Nedel ◽  
Suvranu De
Keyword(s):  
Force Feedback ◽  
Virtual Surgery

scholarly journals Virtual surgery system using deformable organ models and force feedback system with three fingers

1998 ◽  
pp. 397-403 ◽  
Author(s):  
Naoki Suzuki ◽  
Asaki Hattori ◽  
Akihiro Takatsu ◽  
Takahiro Kumano ◽  
Akio Ikemoto ◽  
...  
Keyword(s):  
Force Feedback ◽  
Feedback System ◽  
Virtual Surgery ◽  
Organ Models

Real-Time FEM of Soft Tissues for Virtual Surgery

2009 ◽  
Author(s):  
Christian Willberg ◽  
Harald Berger ◽  
Ulrich Gabbert
Keyword(s):  
Real Time ◽  
Soft Tissues ◽  
Force Feedback ◽  
Surgical Instruments ◽  
Virtual Surgery ◽  
Continuous Training ◽  
Endoscopic Techniques ◽  
Organ Models ◽  
Small Perforation ◽  
High Level

Endoscopic techniques require small perforation holes only as entries for optical and surgical instruments; such enabling the treatment of injuries with a minimized damage of the surrounding health tissue. But the surgeon has to operate in a 3D domain by looking at a distorted 2D image at the screen. It is well known, that a good surgeon needs a continuous training to perform such operations reliable in a top quality. To overcome the high costs and tight ethical restrictions of animal based education and training has result in an increasing development and application of virtual surgery simulators [1]. One of the main issues of surgery simulators is to ensure simultaneously the real time performance of the device, the high-level image representation and an acceptable force-feedback behavior. The basics of such simulators are mathematical models of the involved soft tissues, which have to perform in a realistic physical manner, with dynamic nonlinear large deformations, including the interaction of the different constituents (instrument/organ, organ/organ, organ by itself, cutting, bleeding etc). In the paper the focus is on realistic organ models and the realization of a fast contact search and reaction algorithm.

Research of Intelligent Multi-Role Collaborative Virtual Surgery Simulation Training System Based on TCP / IP

2011 ◽  
Vol 403-408 ◽  
pp. 2281-2284
Author(s):  
Yan Fei Liu ◽  
Xiao Yu Jiang ◽  
Feng Ting Shen
Keyword(s):  
Simulation Training ◽  
Force Feedback ◽  
Training System ◽  
Virtual Simulation ◽  
Visual Simulation ◽  
Virtual Surgery ◽  
Surgery Simulation ◽  
Simulation Technology ◽  
Surgery Training ◽  
Simulation Surgery

The paper researchs on the TCP/IP based Multi-Role virtual surgery simulation training system, which is an intelligent surgery simulation training platform .It make a comprehensive application of visual simulation technology, force feedback technology and Human-Computer interaction technology. Visual simulation technology includes virtual reality, artificial intelligence and dynamic modeling. The use of the TCP/IP interfaces expands the number of user and realizes Multi-Roles collaborative in the same virtual simulation surgery training.

scholarly journals Deformation of Soft Tissue and Force Feedback Using the Smoothed Particle Hydrodynamics

2015 ◽  
Vol 2015 ◽  
pp. 1-10 ◽  
Author(s):  
Xuemei Liu ◽  
Ruiyi Wang ◽  
Yunhua Li ◽  
Dongdong Song
Keyword(s):  
Soft Tissue ◽  
Smoothed Particle Hydrodynamics ◽  
Force Feedback ◽  
Haptic Feedback ◽  
Viscoelastic Model ◽  
Meshfree Method ◽  
Virtual Surgery ◽  
Liver Model ◽  
Particle Hydrodynamics ◽  
Smoothed Particle

We study the deformation and haptic feedback of soft tissue in virtual surgery based on a liver model by using a force feedback device named PHANTOM OMNI developed by SensAble Company in USA. Although a significant amount of research efforts have been dedicated to simulating the behaviors of soft tissue and implementing force feedback, it is still a challenging problem. This paper introduces a kind of meshfree method for deformation simulation of soft tissue and force computation based on viscoelastic mechanical model and smoothed particle hydrodynamics (SPH). Firstly, viscoelastic model can present the mechanical characteristics of soft tissue which greatly promotes the realism. Secondly, SPH has features of meshless technique and self-adaption, which supply higher precision than methods based on meshes for force feedback computation. Finally, a SPH method based on dynamic interaction area is proposed to improve the real time performance of simulation. The results reveal that SPH methodology is suitable for simulating soft tissue deformation and force feedback calculation, and SPH based on dynamic local interaction area has a higher computational efficiency significantly compared with usual SPH. Our algorithm has a bright prospect in the area of virtual surgery.

scholarly journals A Novel Haptic Interactive Approach to Simulation of Surgery Cutting Based on Mesh and Meshless Models

2018 ◽  
Vol 2018 ◽  
pp. 1-16 ◽  
Author(s):  
Qiangqiang Cheng ◽  
Peter X. Liu ◽  
Pinhua Lai ◽  
Shaoping Xu ◽  
Yanni Zou
Keyword(s):  
Soft Tissue ◽  
Force Feedback ◽  
Stability And Convergence ◽  
Virtual Surgery ◽  
Surface Mesh ◽  
Surface Rendering ◽  
Interactive Approach ◽  
Soft Tissue Modelling ◽  
Essential Components ◽  
Cutting Model

In the present work, the majority of implemented virtual surgery simulation systems have been based on either a mesh or meshless strategy with regard to soft tissue modelling. To take full advantage of the mesh and meshless models, a novel coupled soft tissue cutting model is proposed. Specifically, the reconstructed virtual soft tissue consists of two essential components. One is associated with surface mesh that is convenient for surface rendering and the other with internal meshless point elements that is used to calculate the force feedback during cutting. To combine two components in a seamless way, virtual points are introduced. During the simulation of cutting, the Bezier curve is used to characterize smooth and vivid incision on the surface mesh. At the same time, the deformation of internal soft tissue caused by cutting operation can be treated as displacements of the internal point elements. Furthermore, we discussed and proved the stability and convergence of the proposed approach theoretically. The real biomechanical tests verified the validity of the introduced model. And the simulation experiments show that the proposed approach offers high computational efficiency and good visual effect, enabling cutting of soft tissue with high stability.

Visualisation of Burring Operation in Virtual Surgery Simulation

2010 ◽  
Author(s):  
Esin Onbasıog˘lu ◽  
Bas¸ar Atalay ◽  
Dionysis Goularas ◽  
Ahu H. Soydan ◽  
Koray K. S¸afak ◽  
...  
Keyword(s):  
Virtual Reality ◽  
Surgical Training ◽  
Force Feedback ◽  
Surgical Simulation ◽  
Ct Images ◽  
Patient Specific ◽  
Virtual Surgery ◽  
Surgery Simulation ◽  
Real Patients ◽  
Surgical Operations

Virtual reality based surgical training have a great potential as an alternative to traditional training methods. In neurosurgery, state-of-the-art training devices are limited and the surgical experience accumulates only after so many surgical procedures. Incorrect surgical movements can be destructive; leaving patients paralyzed, comatose or dead. Traditional techniques for training in surgery use animals, phantoms, cadavers and real patients. Most of the training is based either on these or on observation behind windows. The aim of this research is the development of a novel virtual reality training system for neurosurgical interventions based on a real surgical microscope for a better visual and tactile realism. The simulation works by an accurate tissue modeling, a force feedback device and a representation of the virtual scene on the screen or directly on the oculars of the operating microscope. An intra-operative presentation of the preoperative three-dimensional data will be prepared in our laboratory and by using this existing platform virtual organs will be reconstructed from real patients’ images. VISPLAT is a platform for virtual surgery simulation. It is designed as a patient-specific system that provides a database where patient information and CT images are stored. It acts as a framework for modeling 3D objects from CT images, visualization of the surgical operations, haptic interaction and mechanistic material-removal models for surgical operations. It tries to solve the challenging problems in surgical simulation, such as real-time interaction with complex 3D datasets, photorealistic visualization, and haptic (force-feedback) modeling. Surgical training on this system for educational and preoperative planning purposes will increase the surgical success and provide a better quality of life for the patients. Surgical residents trained to perform surgery using virtual reality simulators will be more proficient and have fewer errors in the first operations than those who received no virtual reality simulated education. VISPLAT will help to accelerate the learning curve. In future VISPLAT will offer more sophisticated task training programs for minimally invasive surgery; this system will record errors and supply a way of measuring operative efficiency and performance, working both as an educational tool and a surgical planning platform quality.

scholarly journals Performance Optimization of Force Feedback Control System in Virtual Vascular Intervention Surgery

2014 ◽  
Vol 2014 ◽  
pp. 1-11 ◽  
Author(s):  
Zhi Hu ◽  
Ping Cai ◽  
Peng Qin ◽  
Le Xie
Keyword(s):  
Feedback Control ◽  
Performance Optimization ◽  
Force Feedback ◽  
Sliding Mode ◽  
Guide Wire ◽  
Virtual Surgery ◽  
Control Performance ◽  
Optimal Length ◽  
Vascular Intervention ◽  
Flexible Deformation

In virtual surgery of minimally invasive vascular intervention, the force feedback is transmitted through the flexible guide wire. The disturbance caused by the flexible deformation would affect the fidelity of the VR (virtual reality) training. SMC (sliding mode control) strategy with delayed-output observer is adopted to suppress the effect of flexible deformation. In this study, the control performance of the strategy is assessed when the length of guide wire between actuator and the operating point changes. The performance assessment results demonstrate the effectiveness of the proposed method and find the optimal length of guide wire for the force feedback control.

The Development of Minimally Invasive Surgery Simulation Training System Based on Virtual Reality Technology

2011 ◽  
Vol 403-408 ◽  
pp. 2300-2303
Author(s):  
Yan Fei Liu ◽  
Xiao Yu Jiang ◽  
Feng Ting Shen
Keyword(s):  
Minimally Invasive Surgery ◽  
Minimally Invasive ◽  
Real Time ◽  
Invasive Surgery ◽  
Simulation Training ◽  
Force Feedback ◽  
Training System ◽  
Virtual Surgery ◽  
Surgery Simulation ◽  
3 Dimensional

Minimally Invasive Surgery Simulation Training System based on VR technology is comprised of intelligent 3-Dimensional images VR software system and simulated surgical instrument with high perceptibility and high precision force feedback characteristics. Real time VR and simulated instrument with force feedback interact with the operator in real time, achieve high immersive virtual surgery scenario, and allows trainees to perform and improve the whole surgical procedures. By applying synchronized network video server and real-time communication server based on TRP/RTCP, the instructor can view all details of an operator's surgical procedure by a network terminal, and provide real time technical guidance. The system covers minimally invasive surgeries of digestive, urinary, gynecological, thoracic, pediatric , etc.

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