Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2019 Impact factor 1.556

Nuclear Science and Techniques ›› 2006, Vol. 17 ›› Issue (2): 113 doi: 10.1016/S1001-8042(06)60022-5

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Performance evaluation of the backprojection filtered (BPF) algorithm in circular fan-beam and cone-beam CT

LI Liang* CHEN Zhi-Qiang ZHANG Li KANG Ke-Jun   

  1. Department of Engineering Physics, Tsinghua University, Beijing 100084, China
LI Liang CHEN Zhi-Qiang ZHANG Li KANG Ke-Jun. Performance evaluation of the backprojection filtered (BPF) algorithm in circular fan-beam and cone-beam CT.Nuclear Science and Techniques, 2006, 17(2): 113     doi: 10.1016/S1001-8042(06)60022-5
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Abstract: In this article we introduce an exact backprojection filtered (BPF) type reconstruction algorithm for cone-beam scans based on Zou and Pan’s work. The algorithm can reconstruct images using only the projection data passing through the parallel PI-line segments in reduced scans. Computer simulations and practical experiments are carried out to evaluate this algorithm. The BPF algorithm has a higher computational efficiency than the famous FDK algorithm. The BPF algorithm is evaluated using the practical CT projection data on a 450 keV X-ray CT system with a flat-panel detector (FPD). From the practical experiments, we get the spatial resolution of this CT system. The algorithm could achieve the spatial resolution of 2.4 lp/mm and satisfies the practical applications in industrial CT inspection.

Key words: Cone-beam, PI-line, Backprojection filtered (BPF) algorithm, Hilbert transform