NDLI: Fast fan/parallel beam CS-based low-dose CT reconstruction

Content Provider	IEEE Xplore Digital Library
Author	Hashemi, S. Beheshti, S. Gill, P.R. Paul, N.S. Cobbold, R.S.C.
Copyright Year	2013
Description	Author affiliation: Electr. Eng. Dept., Ryerson Univ., Toronto, ON, Canada (Beheshti, S.) \|\| Rambus Labs., Rambus Inc., Sunnyvale, CA, USA (Gill, P.R.) \|\| Inst. of Biomater. & Biomed. Eng., Univ. of Toronto, Toronto, ON, Canada (Hashemi, S.; Paul, N.S.; Cobbold, R.S.C.)
Abstract	Low dose X-ray Computed Tomography (CT) is clinically desired to reduce the risk of cancer caused by X-ray radiation. Compressed Sensing (CS), which allows images to be formed from incomplete data, enables large dose reduction to be achieved. Though this remains to be clinically unrealized due to excessive computation times. In this paper we demonstrate a fast, complete CS-based $ℓ_{2}-TV$ minimizing CT reconstruction method applicable to both parallel and fan beam geometries to recover high quality images from highly undersampled (thus low-dose) data. We apply the fast pseudo-polar Fourier algorithm and the Central Slice Theorem to reduce the computation time of CS recovery. On a typical desktop computer, we are able to reconstruct a 512×512 CT image in approximately 30 seconds: a clinically-significant speedup compared to the many hours required by previous CS methods.
Starting Page	1099
Ending Page	1103
File Size	1680938
Page Count	5
File Format	PDF
ISBN	9781479903566
ISSN	15206149
DOI	10.1109/ICASSP.2013.6637820
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-05-26
Publisher Place	Canada
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Computed tomography Image reconstruction Fourier transforms Biomedical imaging Geometry Computers X-ray imaging Compressed Sensing Computed Tomography Central Slice Theorem Pseudo-Polar Fourier Transform
Content Type	Text
Resource Type	Article

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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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