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Proceedings Paper

Advanced processing for motion-compensated reconstruction in cardiac cone-beam CT
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Paper Abstract

Cardiac CT image reconstruction suffers from artifacts due to heart motion during acquisition. In order to mitigate these effects, it is common practice to choose a protocol with minimal gating window and fast gantry rotation. In addition, it is possible to estimate heart motion retrospectively and to incorporate the information in a motion-compensated reconstruction (MCR). If shape tracking algorithms are used for generation of the heart motion-vector field (MVF), the number and positions of the motion vectors will not coincide with the number and positions of the voxels in the reconstruction grid. In this case, data interpolation is necessary for MCR algorithms which require one motion vector at each voxel location. This work examines different data interpolation approaches for the MVF interpolation problem and the effects on the MCR results.

Paper Details

Date Published: 14 March 2009
PDF: 10 pages
Proc. SPIE 7258, Medical Imaging 2009: Physics of Medical Imaging, 725833 (14 March 2009); doi: 10.1117/12.811086
Show Author Affiliations
Udo van Stevendaal, Philips Research Labs. Hamburg (Germany)
Peter Forthmann, Philips Research Labs. Hamburg (Germany)
Thomas Köhler, Philips Research Labs. Hamburg (Germany)
Jens von Berg, Philips Research Labs. Hamburg (Germany)
Cristian Lorenz, Philips Research Labs. Hamburg (Germany)
Michael Grass, Philips Research Labs. Hamburg (Germany)

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

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