Abstract
Purpose
In this paper, a method for rapidly constructing a virtual surgical simulation system is proposed. A deformation model based on the mechanical properties of the liver and a rapid collision detection between the surgical micro-instruments and the liver tissue are included in this method. The purpose of this work is to improve the accuracy and real time of particle model deformation interaction in virtual surgery system.
Methods
Firstly, a finite element model is established based on the constitutive model parameters of liver tissue. According to the simulation results, a mathematical model of node displacement is established. Secondly, the virtual liver is established based on the fast model reconstruction method, and the virtual manipulator is controlled by Geomagic Touch manipulator. Based on the hybrid bounding box, a rapid collision detection process between the instrument and liver is realized and the proposed deformation method is used to simulate the deformation of liver tissue.
Results
The simulation and experiment results show that the proposed deformation model can achieve high deformation interaction accuracy. The collision detection algorithm based on the hybrid bounding boxes can realize the collision between the liver and the instrument, and the established virtual surgical simulation system can simulate the liver tissue deformation in the case of small loading displacement.
Conclusions
The effectiveness of the collision detection algorithm and deformation model was verified by an established virtual surgery simulation system. The proposed rapid construction method of virtual surgical simulation is feasible.
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Change history
17 April 2021
A Correction to this paper has been published: https://doi.org/10.1007/s11548-021-02362-9
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Acknowledgements
The authors thank Henan Provincial People’s Hospital.
Funding
This work was supported by the National Key Research and Development Plan Project under Grant No. 2018YFB1308100, Zhejiang Provincial Natural Science Foundation under Grant LQ21F020026, Science Foundation of Zhejiang Sci-Tech University (ZSTU) under Grant No. 19022104-Y, General Scientific Research Project of Zhejiang Provincial Department of Education under Grant Nos.19020038-F and 19020033-F, and the National Natural Science Foundation of China under Grant Nos. 51805488 and 51375458.
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Yang, J., Hu, M., Shi, X. et al. Deformation modeling based on mechanical properties of liver tissue for virtuanormal vectors of trianglesl surgical simulation. Int J CARS 16, 253–267 (2021). https://doi.org/10.1007/s11548-020-02297-7
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DOI: https://doi.org/10.1007/s11548-020-02297-7