Artifact reduction in short-scan CBCT by use of optimization-based reconstruction

Z Zhang, X Han, E Pearson, C Pelizzari… - Physics in Medicine …, 2016 - iopscience.iop.org
Z Zhang, X Han, E Pearson, C Pelizzari, EY Sidky, X Pan
Physics in Medicine & Biology, 2016iopscience.iop.org
Increasing interest in optimization-based reconstruction in research on, and applications of,
cone-beam computed tomography (CBCT) exists because it has been shown to have to
potential to reduce artifacts observed in reconstructions obtained with the Feldkamp–Davis–
Kress (FDK) algorithm (or its variants), which is used extensively for image reconstruction in
current CBCT applications. In this work, we carried out a study on optimization-based
reconstruction for possible reduction of artifacts in FDK reconstruction specifically from short …
Abstract
Increasing interest in optimization-based reconstruction in research on, and applications of, cone-beam computed tomography (CBCT) exists because it has been shown to have to potential to reduce artifacts observed in reconstructions obtained with the Feldkamp–Davis–Kress (FDK) algorithm (or its variants), which is used extensively for image reconstruction in current CBCT applications. In this work, we carried out a study on optimization-based reconstruction for possible reduction of artifacts in FDK reconstruction specifically from short-scan CBCT data. The investigation includes a set of optimization programs such as the image-total-variation (TV)-constrained data-divergency minimization, data-weighting matrices such as the Parker weighting matrix, and objects of practical interest for demonstrating and assessing the degree of artifact reduction. Results of investigative work reveal that appropriately designed optimization-based reconstruction, including the image-TV-constrained reconstruction, can reduce significant artifacts observed in FDK reconstruction in CBCT with a short-scan configuration.
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