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Hengyong Yu, Jiansheng Yang, M. Jiang, Ge Wang (2009)
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The Radon Transform
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It is well known that CT projections are redundant. Overthe past decades, significant efforts have been devoted to characterize thedata redundancy in different aspects. Very recently, Clackdoyle and Desbatreported a new integral-type data consistency condition (DCC) for truncated2D parallel-beam projections, which can be applied to a region inside afield of view (FOV) but outside of the convex hull of the compact support ofan object. Inspired by their work, here we derive a more general conditionfor 2D fan-beam geometry with a general scanning trajectory. This extendedDCC is verified with simulated projections of the Shepp-Logan phantom and aclinically collected sinogram. Then, we demonstrate an application of theproposed DCC.
Journal of X-Ray Science and Technology – IOS Press
Published: Sep 21, 2015
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