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AssigneesUniversity of Iowa Research Foundation, Washington University, Research Foundation of State of N.Y.
InventorsPing-Chin Cheng, Donald L. Snyder, Joseph A. O'Sullivan, Ge Wang, Michael W. Vannier
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In the present invention, an iterative process is provided for cone-beam tomography (parallel-beam and fan-beam geometries are considered as its special cases), and applied to metal artifact reduction and local reconstruction from truncated data, as well as image noise reduction. In different embodiments, these iterative processes may be based upon the emission computerized tomography (CT) expectation maximization (EM) formula and/or the algebraic reconstruction technique (ART). In one embodiment, generation of a projection mask and computation of a 3D spatially varying relaxation factor are utilized to compensate for beam divergence, data inconsistence and incompleteness.
A process for reconstructing an image from a cone-beam tomographic system, wherein each frame of the image has an associated cone-beam geometry, and wherein the tomographic system has various geometries and scanning loci, the process comprising the steps of:
A process for reconstructing an image from a cone-beam tomographic system, wherein each frame of the image has an associated cone-beam geometry, and wherein the tomographic system has various geometries and scanning loci, the process comprising the steps of:
A system for reconstructing a cone-beam tomographic image, comprising:
A system for reconstructing a cone-beam tomographic image, comprising:
Dependencies are inferred from the claim text.