Physically realistic virtual surgery using the point-associated finite field (PAFF) approach
Physically realistic virtual surgery using the point-associated finite field (PAFF) approach
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DOI：
10.1162/pres.15.3.294
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发表时间：
2006-06-01
影响因子：
1.1
通讯作者：
Srinivasan, Mandayam A.
中科院分区：
文献类型：
--
作者：
De, Suvranu;Lim, Yi-Je;Srinivasan, Mandayam A.
用于外科手术训练的多模态虚拟环境的生成由于开发异构仿真场景的必要性而变得复杂，所述异构仿真场景诸如涉及外科手术工具与软生物组织在真实的时间中的相互作用的外科手术切口、烧灼、出血和烟雾生成。虽然已经提出了从快速但非物理的基于几何的程序到复杂但计算效率低下的有限元分析方案的几种技术，但没有一种技术是唯一适合解决数字手术问题的。在本文中，我们讨论了现实手术模拟领域所面临的挑战，并提出了一种新的点关联有限域（PAFF）的方法，专门开发来科普这些挑战。基于物理学规定的运动方程，这种技术独立于物质状态，几何形状和材料属性，并允许不同的细节水平。我们提出了几个专门的这个计划的各种操作的复杂性。这种技术的准确性和效率相比，使用传统的有限元方法和模拟结果的解决方案，从可视人体项目获得的分段模型。
The generation of multimodal virtual environments for surgical training is complicated by the necessity to develop heterogeneous simulation scenarios such as surgical incision, cauterization, bleeding, and smoke generation involving the interaction of surgical tools with soft biological tissues in real time. While several techniques ranging from rapid but nonphysical geometry-based procedures to complex but computationally inefficient finite element analysis schemes have been proposed, none is uniquely suited to solve the digital surgery problem. In this paper we discuss the challenges facing the field of realistic surgery simulation and present a novel point-associated finite field (PAFF) approach, developed specifically to cope with these challenges. Based upon the equations of motion dictated by physics, this technique is independent of the state of matter, geometry and material properties and permits different levels of detail. We propose several specializations of this scheme for various operational complexities. The accuracy and efficiency of this technique is compared with solutions using traditional finite element methods and simulation results are reported on segmented models obtained from the Visible Human Project.