title: Constrained Point-Based Framework with Efficient Mechanical Interaction for Virtual Surgery.
abstract: This paper proposes a stable and volume conserving meshless approach for soft tissue deformation in virtual surgery, where an efficient tissue-tissue interaction scheme is designed for interacting deformable bodies. Specifically, we integrate position-based volume constraint into point-based framework in order to conserve the total volume of deformable bodies and maintain the stability of the simulation. Moreover, we resolve the tissue-tissue interactions of deformable bodies with position-based contact model, which directly computes the displacement caused by normal and shear stress. The proposed approach can be regarded as a fast approximation of the precise contact model. Experimental results demonstrate that our approach can well enforce the volume conservation of deformable bodies, and obtain visual plausible behaviors for multiple organs interactions.
authors.affiliation: Department of Computer Science and Engineering, The Chinese University of Hong Kong, Shatin N.T., Hong Kong.
authors.forename: Weixin
authors.initials: W
authors.lastname: Si
authors.affiliation: Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China.
authors.forename: Junliang
authors.initials: J
authors.lastname: Shan
authors.affiliation: Department of Computer Science and Engineering, The Chinese University of Hong Kong, Shatin N.T., Hong Kong.
authors.forename: Xiangyun
authors.initials: X
authors.lastname: Liao
authors.affiliation: Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China.
authors.forename: Weiming
authors.initials: W
authors.lastname: Wang
authors.affiliation: Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China.
authors.forename: Qiong
authors.initials: Q
authors.lastname: Wang
authors.affiliation: Department of Computer Science and Engineering, The Chinese University of Hong Kong, Shatin N.T., Hong Kong.
authors.forename: Pheng-Ann
authors.initials: PA
authors.lastname: Heng
mesh_terms: D003198:Computer Simulation; D055119:Elastic Modulus / Q000502:physiology*; D006244:Hardness / Q000502:physiology; D006801:Humans; D008328:Man-Machine Systems; D008954:Models, Biological; D033081:Shear Strength / Q000502:physiology*; D013314:Stress, Mechanical; D025321:Surgery, Computer-Assisted / Q000379:methods*; D014584:User-Computer Interface; D014781:Viscera / Q000502:physiology*