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Proceedings Paper

Interactive GPU-accelerated image reconstruction in cone-beam CT
Author(s): Lars Hillebrand; Robert M. Lapp; Yiannis Kyriakou; Willi A. Kalender
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Paper Abstract

We offer a novel approach for real-time CT reconstruction with the possibility of interactively changing parameters like the position and orientation of the slice to arbitrary values by the user during the analysis. To achieve this, a new reconstruction, including backprojection, is done every time the user wants to see a different view (in contrast to computing a volume upfront). The reconstruction was implemented on a GPU (graphics processing unit) using OpenGL and provides near real-time performance with less than 20 ms reconstruction time for 512 × 512 images. With this approach the user is free to change parameters that are fixed when a conventional reconstruction is used. So he is free to set the position of the slice, its orientation and the voxel size to arbitrary values, or to select a different set of projections for a cardiac reconstruction. Thus the waiting time for the volume reconstruction is removed. Therefore our method is esp. promising for applications such as intra-operative CT and interventional CT.

Paper Details

Date Published: 13 March 2009
PDF: 8 pages
Proc. SPIE 7258, Medical Imaging 2009: Physics of Medical Imaging, 72582A (13 March 2009); doi: 10.1117/12.812213
Show Author Affiliations
Lars Hillebrand, Friedrich-Alexander-Univ. Erlangen-Nürnberg (Germany)
Robert M. Lapp, VAMP GmbH (Germany)
Yiannis Kyriakou, Friedrich-Alexander-Univ. Erlangen-Nürnberg (Germany)
Willi A. Kalender, Friedrich-Alexander-Univ. Erlangen-Nürnberg (Germany)

Published in SPIE Proceedings Vol. 7258:
Medical Imaging 2009: Physics of Medical Imaging
Ehsan Samei; Jiang Hsieh, Editor(s)

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