19 March 2007 Implementation of the circle-and-line algorithm for 256-detector row CT
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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.
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A. A. Zamyatin, A. A. Zamyatin, B. Chiang, B. Chiang, A. Katsevich, A. Katsevich, S. Nakanishi, S. Nakanishi, M. D. Silver, M. D. Silver, } "Implementation of the circle-and-line algorithm for 256-detector row CT", Proc. SPIE 6510, Medical Imaging 2007: Physics of Medical Imaging, 65105D (19 March 2007); doi: 10.1117/12.713779; https://doi.org/10.1117/12.713779
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