Investigation of BPF algorithm in cone-beam CT with 2D general trajectories |
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| Authors: | Jing Zou Jianbao Gui Junyan Rong Zhanli Hu Qiyang Zhang Dan Xia |
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| Affiliation: | Lauterbur Center for Biomedical Imaging Research, Institute of Biomedical and Health Engineering, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, Guangdong, China Key Lab of Health Informatics of Chinese Academy of Sciences, Shenzhen, Guangdong, China Tianjin University, Tianjin, China. |
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| Abstract: | A mathematical derivation was conducted to illustrate that exact 3D image reconstruction could be achieved for z-homogeneous phantoms from data acquired with 2D general trajectories using the back projection filtration (BPF) algorithm. The conclusion was verified by computer simulation and experimental result with a circular scanning trajectory. Furthermore, the effect of the non-uniform degree along z-axis of the phantoms on the accuracy of the 3D reconstruction by BPF algorithm was investigated by numerical simulation with a gradual-phantom and a disk-phantom. The preliminary result showed that the performance of BPF algorithm improved with the z-axis homogeneity of the scanned object. |
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