7 September 2006 Simulation studies for triple-source helical cone-beam CT
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Abstract
Multiple source helical cone-beam scanning is a promising technique for dynamic volumetric CT/micro-CT. In the previous studies, we had proposed a helical cone-beam scanning mode with triple x-ray source and detector assemblies that are symmetrically arranged, and proved the property of minimum detection windows under this configuration. Moreover, we had established an exact backprojection filtration (BFP) reconstruction algorithm for this setting. In this paper, we perform simulation studies for this reconstruction algorithm with 3D Shepp-Logan and Defrise phantoms. The implementation of the BFP algorithm in the planar detector geometry consists of three steps. First, the cone-beam projection from each of the three sources is differentiated respectively. Second, the derivates on the three inter-helix PI-arcs are summed up with weights to form the backprojection. Third, inverse Hilbert transformations are performed along each of the three inter-helix PI-lines. The reconstructed images validate the proposed algorithm. Furthermore, this work can be generalized to the case of multiple source helical cone-beam CT.
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Jun Zhao, Yannan Jin, Ming Jiang, Tiange Zhuang, Ge Wang, "Simulation studies for triple-source helical cone-beam CT", Proc. SPIE 6318, Developments in X-Ray Tomography V, 63181R (7 September 2006); doi: 10.1117/12.681418; https://doi.org/10.1117/12.681418
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