The Framework for Real-Time Simulation of Deformable Soft-Tissue Using a Hybrid Elastic Model

2006 ◽  
pp. 75-83 ◽  
Author(s):  
Shaoting Zhang ◽  
Lixu Gu ◽  
Weiming Liang ◽  
Pengfei Huang ◽  
Jan Boehm ◽  
...  
Keyword(s):  
Soft Tissue ◽  
Real Time ◽  
Elastic Model ◽  
Real Time Simulation ◽  
Time Simulation

A study of real-time simulation of liver of virtual surgical robot based on biologically position-based dynamic model

2021 ◽  
pp. 1-16
Author(s):  
Dan Luo ◽  
Yu Zhang ◽  
Jia Li ◽  
Jisheng Li
Keyword(s):  
Soft Tissue ◽  
Real Time ◽  
Surgical Instruments ◽  
Organic Polymer ◽  
Tetrahedral Mesh ◽  
Virtual Surgery ◽  
Constraint Force ◽  
Real Time Simulation ◽  
Time Simulation ◽  
Spring Force

Virtual surgery robot can accurately modeling of surgical instruments and human organs, and realistic simulation of various surgical phenomena such as deformation of organic tissues, surgery simulation system can provide operators with reusable virtual training and simulation environment. To meet the requirement of virtual surgery robot for the authenticity and real-time of soft tissue deformation and surgical simulation in liver surgery, a new method is proposed to simulate the deformation of soft tissue. This method combines the spring force, the external force of the system, and the constraint force produced by the constraint function of the position-based dynamics. Based on the position-based dynamics, an improved three-parameter mass-spring model is added. In the calculation of the elastic force, the nonlinearity and viscoelasticity of the soft tissue are introduced, and the joint force of the constraint projection process and the constraint force of the position-based dynamics is used to modify mass points movement. The method of position-based dynamics based on biological characteristics, not only considers the biomechanical properties of biological soft tissue as an organic polymer such as viscoelasticity, nonlinearity, and incompressibility but also retains the rapidity and stability of the position based dynamic method. Through the simulation data, the optimal side length of tetrahedral mesh in the improved three-parameter model is obtained, and the physical properties of the model are proved. The real-time simulation of the liver and other organs is completed by using the Geomagic touch force feedback device, which proves the practicability and effectiveness of this method.

scholarly journals Face-based smoothed finite element method for real-time simulation of soft tissue

2017 ◽  
Author(s):  
Andrea Mendizabal ◽  
Rémi Bessard Duparc ◽  
Huu Phuoc Bui ◽  
Christoph J. Paulus ◽  
Igor Peterlik ◽  
...  
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Soft Tissue ◽  
Real Time ◽  
Real Time Simulation ◽  
Time Simulation ◽  
Smoothed Finite Element Method ◽  
Element Method
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