吉林大学学报(工学版) ›› 2013, Vol. 43 ›› Issue (增刊1): 16-20.

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Correlation technology of suturing procedure in virtual surgery

LYU Meng-ya1,2, HAN Yu-fang1,2, TANG Yong1,2   

  1. 1. College of Information Science and Engineering, Yanshan University, Qinhuangdao 066004, China;
    2. Key Laboratory for Computer Virtual Technology and System Integration of Hebei Province, Yanshan University, Qinhuangdao 066004, China
  • Received:2012-05-25 Published:2013-06-01

Abstract:

Aiming at the difficulty of achieving interactive simulation between soft tissue and suture, a method to simulate suturing procedure in virtual surgery was proposed.Firstly,mass-spring model was used as the physical model for soft tissue.In order to perform the relative motion between two masses of soft tissue realistically,an internal friction coefficient was introduced first.Secondly,the interaction of suture and soft tissue was aralyzed.A simple linear mass-spring model with following the leader algorithm was used to model the suture.A stress aralysis was carried out,when the suture touch the soft tissue,so the interaction process was close to physical reality.The movement of the whole suture computed by following the leader algorithm gave good performance in suture's rigidity characteristics.Finally,the interaction of the two deformable objects in a continuous pattern suture was considered,for each node of the soft tissue model,the node that attached to it was stored.This information can be used to compute the soft tissue deformation well.Experiment shows that it is realistical to simulate the soft tissue deformation and suture.meanwhile,the simulation is in real time.

Key words: virtual surgery, soft tissue deformation, mass-spring, suture, follow the leader

CLC Number: 

  • TP391

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