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Proceedings Paper

VR-based interactive CFD data comparison of flow fields in a human nasal cavity
Author(s): Andreas Gerndt; Torsten Kuhlen; Thomas van Reimersdahl; Matthias Haack; Christian Bischof
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Paper Abstract

The Virtual Reality Center Aachen is developing a Virtual Reality based operation planning system in cooperation with aerodynamics scientists and physicians of several clinical centers. This system is meant to help the preparation of nose surgeries aimed at the elimination of respiratory diseases. A core part is the interactive comparison of experimental data and simulation data in the area of fluid dynamics. In a first step, data comparison is to depict the differences between healthy noses and diseased noses. Later on, data comparison should supply evidence for successful virtual surgeries, which finally results in guidance on the real operation. During virtual surgery sessions, scientists can interactively explore, analyze, annotate, and compare various medical and aerodynamics data sets. Image-based methods are used to extract several features in one image and between compared data sets. The determination of linked features between different data sets is a particular challenge because of their different time frames, scales, and distortions. An optimized human computer interface enables the user to interact intuitively within a virtual environment in order to select and deal with these data sets. Additionally to this interactive exploration, the system also allows automatic searches for cut plane and key frame candidates corresponding to given feature patterns. The comparison system makes use of an already implemented parallelized Computational Fluid Dynamics (CFD) postprocessing, which also extracts enhanced flow features that allow automatic detection of relevant flow regions. Beside vortex detection, the computation of critical points including flow field segmentation is a current research activity. These flow features are favored characteristics for the comparison and help considerably to classify different nose geometries and operation recommendations.

Paper Details

Date Published: 5 May 2004
PDF: 12 pages
Proc. SPIE 5367, Medical Imaging 2004: Visualization, Image-Guided Procedures, and Display, (5 May 2004); doi: 10.1117/12.535419
Show Author Affiliations
Andreas Gerndt, Aachen Univ. (Germany)
Torsten Kuhlen, Aachen Univ. (Germany)
Thomas van Reimersdahl, Aachen Univ. (Germany)
Matthias Haack, Aachen Univ. (Germany)
Christian Bischof, Aachen Univ. (Germany)

Published in SPIE Proceedings Vol. 5367:
Medical Imaging 2004: Visualization, Image-Guided Procedures, and Display
Robert L. Galloway, Editor(s)

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