Haptic Interaction with Segmented Medical Image Embedded in Finite Element Mesh
Haptic Interaction with Segmented Medical Image Embedded in Finite Element Mesh
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DOI：
10.5759/jscas.19.89
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发表时间：
2017
期刊：
影响因子：
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通讯作者：
Kazuya Sase;T. Tsujita;A. Konno
中科院分区：
文献类型：
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作者：
Kazuya Sase;T. Tsujita;A. Konno
患者特异性模型的生成是手术模拟器临床应用的难题之一。具体地，当需要估计软组织变形时，需要从患者的医学图像生成有限元（FE）网格。体嵌入法是有限元网格生成的有效方法之一。在这种方法中，医学体数据被嵌入到一个简单的体积网格，如正交网格。然而，体积嵌入方法在有限元网格中生成不正确的边界曲面。这使得很难解决工具和嵌入体之间的接触问题。在本文中，一个有效的接触处理方法嵌入体积使用的有符号距离场。此外，它的应用触觉渲染。
The generation of patient - specific models is one of the difficult problems in the clinical application of surgery simulators . In particular , when estimation of soft tissue deformation is required , a finite element （ FE ） mesh needs to be generated from the patient ʼ s medical images . One of the effective methods of FE mesh generation is the volume embedding approach . In this approach , the medical volume data are embedded in a simple volumetric mesh such as orthogonal grid . However , the volume embedding method generates an incorrect boundary surface in the FE mesh . This makes it difficult to solve the contact problem between tools and embedded volumes . In this paper , an efficient contact handling method for embedded volumes using the signed distance field is described . In addition , its application to haptic rendering is introduced .