Interactive deformation and cutting simulation directly using patient‐specific volumetric images
Interactive deformation and cutting simulation directly using patient‐specific volumetric images
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DOI：
10.1002/cav.1543
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发表时间：
2014-03
影响因子：
1.1
通讯作者：
Shuai Li;Qinping Zhao;Shengfa Wang;A. Hao;Hong Qin
中科院分区：
文献类型：
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作者：
Shuai Li;Qinping Zhao;Shengfa Wang;A. Hao;Hong Qin
本文系统地提出了一种交互式体积图像处理框架，该框架可以在虚拟手术模拟中快速部署和即时利用患者特定的医学图像，同时几乎不需要用户参与。我们无缝集成多个技术元素，以同步适应物理合理的模拟和高保真解剖结构可视化。给定体积图像，我们以用户透明的方式构建一个代理来表示几何结构并对其物理状态进行编码，而无需显式 3D 重建。在代理动态更新的基础上，我们通过非线性有限元方法模拟了大规模变形、任意切割以及伴随的碰撞响应。通过对非线性有限元模拟产生的稀疏位移场进行上采样，切割/变形的体积图像可以自然演化，并作为时变 3D 纹理来加速直接体积渲染。此外，我们的整个框架基于 CUDA（中国北京航空航天大学）构建，因此即使在商用笔记本电脑上也可以实现交互性能。实现细节、时序统计和物理行为测量都显示了其实用性、效率和鲁棒性。版权所有 © 2013 约翰·威利父子有限公司
This paper systematically advocates an interactive volumetric image manipulation framework, which can enable the rapid deployment and instant utility of patient‐specific medical images in virtual surgery simulation while requiring little user involvement. We seamlessly integrate multiple technical elements to synchronously accommodate physics‐plausible simulation and high‐fidelity anatomical structures visualization. Given a volumetric image, in a user‐transparent way, we build a proxy to represent the geometrical structure and encode its physical state without the need of explicit 3‐D reconstruction. On the basis of the dynamic update of the proxy, we simulate large‐scale deformation, arbitrary cutting, and accompanying collision response driven by a non‐linear finite element method. By resorting to the upsampling of the sparse displacement field resulted from non‐linear finite element simulation, the cut/deformed volumetric image can evolve naturally and serves as a time‐varying 3‐D texture to expedite direct volume rendering. Moreover, our entire framework is built upon CUDA (Beihang University, Beijing, China) and thus can achieve interactive performance even on a commodity laptop. The implementation details, timing statistics, and physical behavior measurements have shown its practicality, efficiency, and robustness. Copyright © 2013 John Wiley & Sons, Ltd.