Modeling and simulation of soft tissue deformation

Yuping Duan, Weimin Huang, Huibin Chang, Wenyu Chen, Kyaw Kyar Toe, Jiayin Zhou, Tao Yang, Jiang Liu, Soo Kng Teo, Chi Wan Lim, Yi Su, Chee Kong Chui, Stephen Chang

Research output: Chapter in Book/Conference proceedingConference contributionpeer-review

4 Citations (Scopus)

Abstract

A stable and accurate deformable model to simulate the deformation of soft tissues is a challenging area of research. This paper describes a soft tissue simulation method that can deform multiple organs synchronously and interact with virtual surgical instruments accurately. The model we used in our method is a multi-organ system by point masses and springs. The organs that anatomically connect to each other are jointed together by high stiffness springs. Here we propose a volume preserved mass-spring model for simulation of soft organ deformation. It does not rely on any direct constraint on the volume of tetrahedrons, but rather two constraints on the length of springs and the third constraint on the direction of springs. To provide reliable interaction between the soft tissues and kinematic instruments we incorporate the position-based attachment to accurately move the soft tissue with the tools. Experiments have been designed for evaluation of our method on porcine organs. Using a pair of freshly harvested porcine liver and gallbladder, the real organ deformation is CT scanned as ground truth for evaluation. Compared to the porcine model, our model achieves a mean absolute error 1.5024 mm on landmarks with a overall surface error 1.2905 mm for a small deformation (the deformation of the hanging point is 49.1091 mm) and a mean absolute error 2.9317 mm on landmarks with a overall surface error 2.6400 mm for a large deformation (the deformation of the hanging point is 83.1376 mm). The change of volume for the two deformations are limited to 0.22% and 0.59%, respectively. Finally, we show that the proposed model is able to simulate the large deformation of the liver and gallbladder system in real-time calculations.

Original languageEnglish
Title of host publicationAbdominal Imaging
Subtitle of host publicationComputation and Clinical Applications - 5th International Workshop, Held in Conjunction with MICCAI 2013, Proceedings
Pages221-230
Number of pages10
DOIs
Publication statusPublished - 2013
Externally publishedYes
Event5th International Workshop on Abdominal Imaging: Computation and Clinical Applications, Held in Conjunction with 16th International Conference on Medical Image Computing and Computer-Assisted Intervention, MICCAI 2013 - Nagoya, Japan
Duration: 22 Sep 201322 Sep 2013

Publication series

NameLecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
Volume8198 LNCS
ISSN (Print)0302-9743
ISSN (Electronic)1611-3349

Conference

Conference5th International Workshop on Abdominal Imaging: Computation and Clinical Applications, Held in Conjunction with 16th International Conference on Medical Image Computing and Computer-Assisted Intervention, MICCAI 2013
Country/TerritoryJapan
CityNagoya
Period22/09/1322/09/13

Keywords

  • mass-spring
  • Physically based modeling
  • surgery simulation
  • time integration
  • volume preservation

ASJC Scopus subject areas

  • Theoretical Computer Science
  • Computer Science (all)

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