Searching for just a few words should be enough to get started. If you need to make more complex queries, use the tips below to guide you.
Article type: Research Article
Authors: Tang, Shaojiea; b; c; * | Huang, Tongganga | Qiao, Zhiweid | Li, Baoleie | Xu, Yuanfeie | Mou, Xuanqinf | Fan, Jiulunb; g
Affiliations: [a] School of Automation, Xi’an University of Posts and Telecommunications, Xi’an, Shaanxi, China | [b] Automatic Sorting Technology Research Center, Xi’an University of Posts and Telecommunications, State Post Bureau of the People’s Republic of China, Xi’an, Shaanxi, China | [c] Xi’an Key Laboratory of Advanced Control and Intelligent Process, Xi’an, Shaanxi, China | [d] School of Computer and Information Technology, Shanxi University, Taiyuan, Shanxi, China | [e] Beijing Hangxing Machinery Co., Ltd., Dongcheng, Beijing, China | [f] School of Electronics and Information Engineering, Xi’an Jiaotong University, Xi’an, Shaanxi, China | [g] School of Communications and Information Engineering, Xi’an University of Posts and Telecommunications, Xi’an, Shaanxi, China
Correspondence: [*] Corresponding author: Shaojie Tang, School of Automation, Xi’an University of Posts and Telecommunications, Xi’an, Shaanxi 710121, China. E-mail: tangshaojie@xupt.edu.cn.
Abstract: Tube of X-ray computed tomography (CT) system emitting a polychromatic spectrum of photons leads to beam hardening artifacts such as cupping and streaks, while the metal implants in the imaged object results in metal artifacts in the reconstructed images. The simultaneous emergence of various beam-hardening artifacts degrades the diagnostic accuracy of CT images in clinics. Thus, it should be deeply investigated for suppressing such artifacts. In this study, data consistency condition is exploited to construct an objective function. Non-convex optimization algorithm is employed to solve the optimal scaling factors. Finally, an optimal bone correction is acquired to simultaneously correct for cupping, streaks and metal artifacts. Experimental result acquired by a realistic computer simulation demonstrates that the proposed method can adaptively determine the optimal scaling factors, and then correct for various beam-hardening artifacts in the reconstructed CT images. Especially, as compared to the nonlinear least squares before variable substitution, the running time of the new CT image reconstruction algorithm decreases 82.36% and residual error reduces 55.95%. As compared to the nonlinear least squares after variable substitution, the running time of the new algorithm decreases 67.54% with the same residual error.
Keywords: X-ray CT; beam hardening; consistency condition; non-convex optimization
DOI: 10.3233/XST-221176
Journal: Journal of X-Ray Science and Technology, vol. 30, no. 4, pp. 805-822, 2022
IOS Press, Inc.
6751 Tepper Drive
Clifton, VA 20124
USA
Tel: +1 703 830 6300
Fax: +1 703 830 2300
sales@iospress.com
For editorial issues, like the status of your submitted paper or proposals, write to editorial@iospress.nl
IOS Press
Nieuwe Hemweg 6B
1013 BG Amsterdam
The Netherlands
Tel: +31 20 688 3355
Fax: +31 20 687 0091
info@iospress.nl
For editorial issues, permissions, book requests, submissions and proceedings, contact the Amsterdam office info@iospress.nl
Inspirees International (China Office)
Ciyunsi Beili 207(CapitaLand), Bld 1, 7-901
100025, Beijing
China
Free service line: 400 661 8717
Fax: +86 10 8446 7947
china@iospress.cn
For editorial issues, like the status of your submitted paper or proposals, write to editorial@iospress.nl
如果您在出版方面需要帮助或有任何建, 件至: editorial@iospress.nl