一种使用高阶单元结合网格优化的变形物体新型虚拟切割方法。
A novel virtual cutting method for deformable objects using high-order elements combined with mesh optimisation.
机构信息
School of Mechanical and Power Engineering, Harbin University of Science and Technology, Harbin, China.
出版信息
Int J Med Robot. 2022 Oct;18(5):e2423. doi: 10.1002/rcs.2423. Epub 2022 May 23.
BACKGROUND
Virtual cutting of deformable objects plays an important role in many applications, especially in digital medicine, such as soft tissue cutting in virtual surgery training system.
METHODS
We developed a novel virtual cutting algorithm, combined with mesh optimisation. A new local mesh processing method is used to control the number and quality of the elements created during the cutting process. At the same time, high-order tetrahedral elements are used to fit the cutting surface and reduce the mesh size.
RESULTS
In this paper, single cut, multiple cut and intersecting cut are performed on the mesh model, combined with a force feedback device, and the result obtained is that the visual feedback is higher than 30 Hz, and the tactile feedback is 800∼1000 Hz.
CONCLUSIONS
Experimental results show that the method proposed in this paper can effectively eliminate low-quality elements and control the mesh size, thereby ensuring real-time simulation.
背景
在许多应用中，尤其是在数字医学领域，如虚拟手术训练系统中的软组织切割，变形物体的虚拟切割起着重要作用。
方法
我们开发了一种新的虚拟切割算法，结合了网格优化。一种新的局部网格处理方法用于控制切割过程中创建的元素的数量和质量。同时，使用高阶四面体元素来拟合切割面并减小网格尺寸。
结果
在本文中，对网格模型进行了单切、多切和相交切操作，结合力反馈设备，得到的结果是视觉反馈高于 30 Hz，触觉反馈为 800∼1000 Hz。
结论
实验结果表明，本文提出的方法可以有效地消除低质量元素并控制网格尺寸，从而确保实时模拟。
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