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: Chen, Mianyia; b | Xi, Yanb | Cong, Wenxiangb | Liu, Baodongc; d | Wei, Biaoa; * | Wang, Geb; *
Affiliations: [a] Key Laboratory of Optoelectronics Technology and System, Ministry of Education, Chongqing University, Chongqing, China | [b] Department of Biomedical Engineering, Rensselaer Polytechnic Institute, Troy, NY, USA | [c] Division of Nuclear Technology and Applications, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China | [d] Beijing Engineering Research Center of Radiographic Techniques and Equipment, Beijing, China
Correspondence: [*] Corresponding author: Biao Wei, Key Laboratory of Optoelectronics Technology and System, Ministry of Education, Chongqing University, Chongqing 400044, China. Tel.: +86 13638330906; Fax: +86 02365106109; E-mail: [email protected].
Correspondence: [*] Corresponding author: Ge Wang, Department of Biomedical Engineering, Rensselaer Polytechnic Institute, Troy, NY 12180, USA. Tel.: +1 5186982500; Fax: +1 5182764233; E-mail: [email protected].
Abstract: For X-ray computed tomography (CT), geometric calibration and rigid patient motion compensation are inter-related issues for optimization of image reconstruction quality. Non-calibrated system geometry and patient movement during a CT scan will result in streak-like, blurring and other artifacts in reconstructed images. In this paper, we propose a locally linear embedding based calibration approach to address this challenge under a rigid 2D object assumption and a more general way than what has been reported before. In this method, projections are linearly represented by up-sampled neighbors via locally linear embedding, and CT system parameters are iteratively estimated from projection data themselves. Numerical and experimental studies show that images reconstructed with calibrated parameters are in excellent agreement with the counterparts reconstructed with the true parameters.
Keywords: Geometric calibration, rigid patient motion, locally linear embedding (LLE)
DOI: 10.3233/XST-160548
Journal: Journal of X-Ray Science and Technology, vol. 24, no. 2, pp. 241-256, 2016
IOS Press, Inc.
6751 Tepper Drive
Clifton, VA 20124
USA
Tel: +1 703 830 6300
Fax: +1 703 830 2300
[email protected]
For editorial issues, like the status of your submitted paper or proposals, write to [email protected]
IOS Press
Nieuwe Hemweg 6B
1013 BG Amsterdam
The Netherlands
Tel: +31 20 688 3355
Fax: +31 20 687 0091
[email protected]
For editorial issues, permissions, book requests, submissions and proceedings, contact the Amsterdam office [email protected]
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
[email protected]
For editorial issues, like the status of your submitted paper or proposals, write to [email protected]
如果您在出版方面需要帮助或有任何建, 件至: [email protected]