NDLI: Metal Artifact Reduction in Helical Cone-beam Computed Tomography

Content Provider	IEEE Xplore Digital Library
Author	Jie Tang Li Zhang Zhiqiang Chen Yuxiang Xing Jianping Cheng
Copyright Year	2006
Description	Author affiliation: Dept. of Eng. Phys., Tsinghua Univ., Beijing (Jie Tang; Li Zhang; Zhiqiang Chen; Yuxiang Xing; Jianping Cheng)
Abstract	Metal artifacts are a major problem in computed tomography (CT). Most traditional metal artifact reduction (MAR) methods require a forward projection step which is time-consuming and costs unacceptable time in helical cone-beam CT (HCBCT). In this work, we propose an MAR method in the projection completion way without forward projection. Our MAR method locates the metal-affected data from only rays passing metal area segmented out from reconstructions, which tremendously saves computation compared with a complete forward projection. The method automatically takes care of multi-metal cases and can be used in fully 3D scan directly. Both numerical simulations and phantom experiments on a helical scan are done to evaluate the performance. FDK algorithm and the helical backprojection-filtration (BPF) algorithm are used for reconstruction. In the helical FDK reconstruction a linear interpolation is used for MAR, while in the helical BPF reconstruction a linear interpolation and a second-order polynomial interpolation are used for comparison. The experimental results show that the proposed MAR method can improve the image quality significantly and the processing time is ignorable compared to the step of reconstruction.
Starting Page	2878
Ending Page	2881
File Size	4249966
Page Count	4
File Format	PDF
ISBN	1424405602
ISSN	10957863
DOI	10.1109/NSSMIC.2006.356477
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2006-10-29
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Computed tomography Image reconstruction Interpolation Reconstruction algorithms Detectors Band pass filters Costs Numerical simulation Imaging phantoms Polynomials
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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