用于个体化虚拟腹腔镜机器人的器官交互切割模型构建方法

By constructing an organ-interactive cutting model using an individualized virtual laparoscopic robot, and employing a cutting and fracture strategy and an adaptive finite element mesh refinement strategy, the problem of inaccurate prediction of liver tissue biomechanical parameters was solved, resulting in an efficient organ-interactive cutting model that improves simulation efficiency and realism.

CN120108742BActive Publication Date: 2026-07-17QINGDAO UNIV

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
QINGDAO UNIV
Filing Date
2024-12-27
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Existing technologies lack accurate prediction of liver tissue biomechanical parameters, have low computational efficiency during the cutting process, and make it difficult to construct an efficient organ interaction cutting model.

Method used

By setting a cutting and fracture strategy and a finite element mesh adaptive refinement strategy, an organ interaction cutting model of an individualized virtual laparoscopic robot is constructed. Using volume rendering 3D reconstruction algorithm and finite element discretization processing, combined with the mesh adaptive refinement strategy and cutting and fracture conditions, biomimetic cutting is achieved.

Benefits of technology

It improves the operational precision and simulation efficiency of virtual laparoscopic surgical robots, enhances the real-time performance and calculation accuracy of cutting simulation, is suitable for miniaturized virtual laparoscopic surgical systems, and enhances the operator's sense of realism.

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Abstract

用于个体化虚拟腹腔镜机器人的器官交互切割模型构建方法,属于建模技术领域。所述切割仿真模型的构建方法包括:利用体绘制三维重建算法,构建个体化组织器官三维几何模型;对三维几何模型进行有限元离散化处理;对三维几何模型配置切割断裂策略和网格自适应细化策略,生成器官交互切割模型;其中,所述切割断裂策略包括设定一形变阈值判断组织器官是否发生断裂,所述网格自适应细化策略包括通过线性加权方式定义有限元网格密度函数,所述有限元网格密度函数能够基于形变偏置和切割操作时间,自适应地调整有限元网格密度;将模型交互单元与外部腔镜手术机械臂联合配准,通过腔镜机械臂模拟切割刀,实现组织器官切割的手术模拟过程。本申请提出了一种能够对个体化组织器官的切割进行实时仿真模拟的方法和模型,还原度高,计算量小,模型生成速度快,该模型能够同六个自由度的腔镜手术机器人操作臂有效结合,改善个体化虚拟腹腔镜手术机器人的操作仿生性和时效性。
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