Year: 2016
Author: Hyoung Suk Park, Hao Gao, Sung Min Lee, Jin Keun Seo
Journal of Computational Mathematics, Vol. 34 (2016), Iss. 6 : pp. 671–682
Abstract
High-attenuation object-induced streaking and shadow artifacts in computerized tomography (CT) are somewhat connected to the misfit of the X-ray projection data to the range space of the Radon transform. This misfit is mainly due to the beam hardening factor of the projection data which is unavoidable for polychromatic sources. The major difficulty in dealing with the beam hardening-induced streaking and shadow artifacts comes from its highly nonlinear nature depending on geometries of high attenuation objects. In this work, we investigate the mathematical characteristics of those streaking and shadow artifacts from the structure of the projection data. We also proposed a metal artifacts reduction method by incorporating the recent technique of the nonlinear beam-hardening corrector. Numerical simulations show that the proposed method effectively alleviates the streaking artifacts without changing the background images.
You do not have full access to this article.
Already a Subscriber? Sign in as an individual or via your institution
Journal Article Details
Publisher Name: Global Science Press
Language: English
DOI: https://doi.org/10.4208/jcm.1607-m2016-0531
Journal of Computational Mathematics, Vol. 34 (2016), Iss. 6 : pp. 671–682
Published online: 2016-01
AMS Subject Headings:
Copyright: COPYRIGHT: © Global Science Press
Pages: 12
Keywords: Computed tomography Metal artifact reduction Beam hardening Radon transform.
Author Details
-
CT sinogram‐consistency learning for metal‐induced beam hardening correction
Park, Hyoung Suk | Lee, Sung Min | Kim, Hwa Pyung | Seo, Jin Keun | Chung, Yong EunMedical Physics, Vol. 45 (2018), Iss. 12 P.5376
https://doi.org/10.1002/mp.13199 [Citations: 92] -
Pseudo-monochromatic Imaging in Industrial X-Ray Computed Tomography
Park, Hyoung Suk | Jung, Junhwa | Seo, Jin KeunSIAM Journal on Imaging Sciences, Vol. 14 (2021), Iss. 3 P.1306
https://doi.org/10.1137/20M1373761 [Citations: 1] -
X-ray computed tomography: Practical evaluation of beam hardening in iron ore samples
Bam, Lunga Cleartone | Miller, Jodie Ann | Becker, Megan | Basson, Ian JamesMinerals Engineering, Vol. 131 (2019), Iss. P.206
https://doi.org/10.1016/j.mineng.2018.11.010 [Citations: 16]