3 March 2012 Fast-forward projection approach for 3D iterative metal artifact suppression
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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.
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Andre Souza, "Fast-forward projection approach for 3D iterative metal artifact suppression", Proc. SPIE 8313, Medical Imaging 2012: Physics of Medical Imaging, 83133P (3 March 2012); doi: 10.1117/12.904555; https://doi.org/10.1117/12.904555
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