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Proceedings Paper

Implementation of the circle-and-line algorithm for 256-detector row CT
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Paper Abstract

In this work we apply the circle-and-line acquisition for the 256-detector row medical CT scanner. Reconstruction is based on the exact algorithm of the FBP type suggested recently by one of the co-authors. We derived equations for the cylindrical detector, common for medical CT scanners. To minimize hardware development efforts we use ramp-based reconstruction of the circle data. The line data provides an additional term that corrects the cone beam artifacts that are caused by the incompleteness of the circular trajectory. We illustrate feasibility of our approach using simulated data and real scanned data of the anthropomorphic phantom and evaluate stability of reconstruction to motion and misalignments during the scan. The additional patient dose from the line scan is relatively low compared to the circle scan. The proposed algorithm allows cone beam artifact-free reconstruction with large cone angle.

Paper Details

Date Published: 19 March 2007
PDF: 9 pages
Proc. SPIE 6510, Medical Imaging 2007: Physics of Medical Imaging, 65105D (19 March 2007); doi: 10.1117/12.713779
Show Author Affiliations
A. A. Zamyatin, Toshiba Medical Research Institute USA (United States)
B. Chiang, Toshiba Medical Research Institute USA (United States)
A. Katsevich, Univ. of Central Florida (United States)
S. Nakanishi, Toshiba Medical Systems Corp. (Japan)
M. D. Silver, Toshiba Medical Research Institute USA (United States)

Published in SPIE Proceedings Vol. 6510:
Medical Imaging 2007: Physics of Medical Imaging
Jiang Hsieh; Michael J. Flynn, Editor(s)

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