Computer-aided parametric prosthetic socket design based on real-time soft tissue deformation and an inverse approach

2021 ◽  
Author(s):  
Abbass Ballit ◽  
Imad Mougharbel ◽  
Hassan Ghaziri ◽  
Tien-Tuan Dao
Keyword(s):  
Soft Tissue ◽  
Real Time ◽  
Tissue Deformation ◽  
Soft Tissue Deformation ◽  
Inverse Approach ◽  
Prosthetic Socket ◽  
Computer Aided

scholarly journals GPU-based real-time soft tissue deformation with cutting and haptic feedback

2010 ◽  
Vol 103 (2-3) ◽  
pp. 159-168 ◽  
Author(s):  
Hadrien Courtecuisse ◽  
Hoeryong Jung ◽  
Jérémie Allard ◽  
Christian Duriez ◽  
Doo Yong Lee ◽  
...  
Keyword(s):  
Soft Tissue ◽  
Real Time ◽  
Haptic Feedback ◽  
Tissue Deformation ◽  
Soft Tissue Deformation

scholarly journals Development of an Evaluation System for Magnetic Resonance Imaging Based Three-Dimensional Modeling of a Transfemoral Prosthetic Socket Using Finite Elements

2019 ◽  
Vol 9 (18) ◽  
pp. 3662
Author(s):  
Mohd Syahmi Jamaludin ◽  
Akihiko Hanafusa ◽  
Yamamoto Shinichirou ◽  
Yukio Agarie ◽  
Hiroshi Otsuka ◽  
...  
Keyword(s):  
Magnetic Resonance ◽  
Soft Tissue ◽  
Computer Aided Design ◽  
Evaluation System ◽  
Three Dimensional ◽  
Magnetic Resonance Images ◽  
Future Research ◽  
Tissue Deformation ◽  
Soft Tissue Deformation ◽  
Prosthetic Socket

Recent technologies have suggested the utilization of three-dimensional (3D) printing technology to enhance the fabrication accuracy of prosthetics. Accordingly, simulations are used to obtain precise parameters for subject-specified prosthetic socket. This study proposes an evaluation system to measure the accuracy of a subject-specific 3D transfemoral residuum model during the interaction with the socket in conjunction with the application of finite element methods. The proposed system can be used in future validations of socket fabrication. The evaluation is based on the measurement of the residuum’s soft tissue deformation inside two types of prosthetic sockets. In comparison with other studies, the 3D models were constructed with magnetic resonance images (MRI) with the aid of computer-aided design (CAD) software. The measurement of soft tissue deformation was conducted based on the measurement of the volumetric value of fat, muscle and skin in the pre- and post-donning phases. The result yielded a promising correlation coefficient value between the simulation and the experiment in the soft tissue deformation evaluation. The relation of the muscle–fat ratio in the residuum is extremely important in the determination of the ability of the prosthetic to deform. The environment during the socket fitting session was similar to that defined by the set boundary conditions in simulations. In view of the promising results of this study, the evaluation system proposed herein is considered reliable and is envisaged to be used in future research.

Real-Time Interactive Calculation Model of Soft Tissue Deformation with Pull

2012 ◽  
Vol 7 (9) ◽  
pp. 341-348
Author(s):  
Xiaorui Zhang ◽  
Wei Sun ◽  
Ailing Ji ◽  
Silin Chen ◽  
Bangzhen Shen
Keyword(s):  
Soft Tissue ◽  
Real Time ◽  
Calculation Model ◽  
Tissue Deformation ◽  
Soft Tissue Deformation

Interactive Soft Tissue Deformation Simulation Using Physically Based Modeling

2006 ◽  
Author(s):  
Xiaoyi Chi ◽  
Ming C. Leu
Keyword(s):  
Soft Tissue ◽  
Real Time ◽  
Solid Mechanics ◽  
Meshfree Method ◽  
Constitutive Law ◽  
Physically Based Modeling ◽  
Tissue Deformation ◽  
Soft Tissue Deformation ◽  
Point Collocation ◽  
Physically Based

This paper presents a study on physically based modeling and simulation of soft tissue deformation, with the goal of producing realistic, real-time effects during the simulation. We consider soft tissue deformation as a solid mechanics problem with a linear elastic constitutive law. A point collocation based meshfree method is employed to solve the governing equations. To achieve real-time performance, an octree data structure is used to organize the support sets and the nodes to expedite the computation in the meshfree method. The developed system brings together the surface representation for visualization and meshfree modeling for physically based animation to set up a virtual reality environment for soft tissue surgery simulation.

scholarly journals Integrating viscoelastic mass spring dampers into position-based dynamics to simulate soft tissue deformation in real time

2018 ◽  
Vol 5 (2) ◽  
pp. 171587 ◽  
Author(s):  
Lang Xu ◽  
Yuhua Lu ◽  
Qian Liu
Keyword(s):  
Soft Tissue ◽  
Real Time ◽  
Elastic Force ◽  
Virtual Surgery ◽  
Tissue Deformation ◽  
Soft Tissue Deformation ◽  
Spring Force ◽  
Stability And Accuracy ◽  
Mass Spring ◽  
Surgery Simulator

We propose a novel method to simulate soft tissue deformation for virtual surgery applications. The method considers the mechanical properties of soft tissue, such as its viscoelasticity, nonlinearity and incompressibility; its speed, stability and accuracy also meet the requirements for a surgery simulator. Modifying the traditional equation for mass spring dampers (MSD) introduces nonlinearity and viscoelasticity into the calculation of elastic force. Then, the elastic force is used in the constraint projection step for naturally reducing constraint potential. The node position is enforced by the combined spring force and constraint conservative force through Newton's second law. We conduct a comparison study of conventional MSD and position-based dynamics for our new integrating method. Our approach enables stable, fast and large step simulation by freely controlling visual effects based on nonlinearity, viscoelasticity and incompressibility. We implement a laparoscopic cholecystectomy simulator to demonstrate the practicality of our method, in which liver and gallbladder deformation can be simulated in real time. Our method is an appropriate choice for the development of real-time virtual surgery applications.

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