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Article type: Research Article
Authors: Sen Sharma, Kriti | Jin, Xin | Holzner, Christian | Narayanan, Shree | Liu, Baodong | Wang, Dong | Agah, Masoud | Wang, Linbing | Yu, Hengyong | Wang, Ge
Affiliations: Department of Electrical and Computer Engineering, Virginia Tech, Blacksburg, VA, USA | Department of Engineering Physics, Tsinghua University, Beijing, China | Xradia Inc., Pleasanton, CA, USA | Biomedical Imaging Division, VT-WFU School of Biomedical Engineering and Sciences, Wake Forest University Health Sciences, Winston-Salem, NC, USA | Department of Civil and Environmental Engineering, Virginia Tech, Blacksburg, VA, USA | Biomedical Imaging Center, Rensselaer Polytechnic Institute, Troy, NY, USA
Note: [] Corresponding author: Ge Wang, PhD, Clark and Crossan Chair Professor, Director of Biomedical Imaging Center, Room 3209, CBIS/BME, RPI, Troy, New York 12180, USA. Tel.: +1 518 698 2500; Fax: +1 518 276 3035; E-mail: [email protected]
Abstract: High-resolution micro-CT offers 3D non-destructive imaging but scan times are prohibitively large in many cases. Advancements in image reconstruction offer great reduction in number of views while maintaining reconstruction accuracy; yet filtered back projection remains the de facto standard. An extensive study of few-view reconstruction using compressed-sensing based iterative techniques is carried out. Also, a novel 3D micro-CT phantom is proposed, and used for analyzing reconstruction accuracy. Numerical tests, and studies on real micro-CT data show that if measurement noise in projections is not extremely high, the number of views may be reduced to 1/8^{th} of the typically acquired view numbers. The study motivates the adoption of advanced reconstruction techniques to allow faster scanning, lower dosage, and reduced data size in high-resolution micro-CT.
Keywords: Few-view reconstruction, micro-CT, compressed sensing, TV minimization, SART-TV
DOI: 10.3233/XST-130364
Journal: Journal of X-Ray Science and Technology, vol. 21, no. 1, pp. 25-42, 2013
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