Patch green coordinates based interactive embedded deformable model

Weixin Si, Qiong Wang, Jing Lu, Jing Qin, Xiangyun Liao, Pheng Ann Heng

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review


Virtual surgery is a serious game which provides an opportunity to acquire cognitive and technical surgical skills via virtual surgical training and planning. However, interactively and realistically manipulating the human organ and simulating its motion under interaction is still a challenging task in this field. The underlying reason for this issue is the conflict requirements for physical constraints with high fidelity and real-time performance. To achieve realistic simulation of human organ motion with volume conservation, smooth interpolation under large deformation and precise frictional contact mechanics of global behavior in surgical scenario. This paper presents a novel and effective patch Green coordinates based interpolation for embedded deformable model to achieve the volume-preserving and smooth interpolation effects. Besides, we resolve the frictional contact mechanics for embedded deformable model, and further provide the precise boundary conditions for mechanical solver. In addition, our embedded deformable model is based on the total lagrangian explicit dynamics (TLED) finite element method (FEM) solver, which can well handle the large biological tissue deformation with both nonlinear geometric and material properties. In real compression experiments, our method can achieve liver deformation with average accuracy of 3.02 mm. Besides, the experimental results demonstrate that our method can also achieve smoother interpolation and volume-preserving effects than original embedded deformable model, and allows complex and accurate organ motion with mechanical interactions in virtual surgery.

Original languageEnglish
Title of host publicationProceedings - MIG 2017
Subtitle of host publicationMotion in Games
EditorsStephen N. Spencer
PublisherAssociation for Computing Machinery, Inc
ISBN (Electronic)9781450355414
Publication statusPublished - 8 Nov 2017
Event10th International Conference on Motion in Games, MIG 2017 - Barcelona, Spain
Duration: 8 Nov 201710 Nov 2017

Publication series

NameProceedings - MIG 2017: Motion in Games


Conference10th International Conference on Motion in Games, MIG 2017


  • Frictional Contact Mechanics
  • Interactive Embedded Deformable Model
  • Patch Green Coordinates
  • Virtual Surgery

ASJC Scopus subject areas

  • Computer Graphics and Computer-Aided Design
  • Software
  • Human-Computer Interaction


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