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Indexed by:期刊论文

Date of Publication:2014-03-01

Journal:COMPUTER ANIMATION AND VIRTUAL WORLDS

Included Journals:SCIE、EI、Scopus

Volume:25

Issue:2

Page Number:155-169

ISSN No.:1546-4261

Key Words:volumetric image manipulation; patient-specific medical simulation; physics-based modeling; CUDA

Abstract: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 (c) 2013 John Wiley & Sons, Ltd.