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

ADVANCED NUCLEAR INSTRUMENTATION AND DETECTION

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

Nuclear Science and Techniques

Vol.17, No.2

pp.113-117

Published in print 20 Apr 2006

DOI：10.1016/S1001-8042(06)60022-5

CLC：TP301.6

52200

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.

Cone-beamPI-lineBackprojection filtered (BPF) algorithmHilbert transform

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