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Proceedings Paper

Fast-forward projection approach for 3D iterative metal artifact suppression
Author(s): Andre Souza
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Paper Abstract

Despite the advance in iterative reconstruction methods for reducing metal artifacts, Feldkamp (FDK) based algorithms continue to be the most widely used CT reconstruction in medicine. While computationally efficient, FDK performs poorly in the presence of metallic objects. Projection-completion algorithms have been used to suppress metallic artifacts and, hence, improve image quality in FDK reconstruction. Here, we present a threedimensional adaptive filtering method that performs projection completion. It takes into account the metal content fraction in the voxel and applies a correction in the projections. This algorithm uses a fast, simple, forward-projection method to obtain accurate metal probability regions in the projection space. We compare our results with those obtained using projection completion by linear interpolation on a dental cone-beam CT.

Paper Details

Date Published: 3 March 2012
PDF: 6 pages
Proc. SPIE 8313, Medical Imaging 2012: Physics of Medical Imaging, 83133P (3 March 2012); doi: 10.1117/12.904555
Show Author Affiliations
Andre Souza, Carestream Health, Inc. (United States)

Published in SPIE Proceedings Vol. 8313:
Medical Imaging 2012: Physics of Medical Imaging
Norbert J. Pelc; Robert M. Nishikawa; Bruce R. Whiting, Editor(s)

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