title: Investigation of BPF algorithm in cone-beam CT with 2D general trajectories.
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.
authors.affiliation: Lauterbur Center for Biomedical Imaging Research, Institute of Biomedical and Health Engineering, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Guangdong, China.
authors.forename: Jing
authors.initials: J
authors.lastname: Zou
authors.forename: Jianbao
authors.initials: J
authors.lastname: Gui
authors.forename: Junyan
authors.initials: J
authors.lastname: Rong
authors.forename: Zhanli
authors.initials: Z
authors.lastname: Hu
authors.forename: Qiyang
authors.initials: Q
authors.lastname: Zhang
authors.forename: Dan
authors.initials: D
authors.lastname: Xia
mesh_terms: D000465:Algorithms; D003198:Computer Simulation; D054893:Cone-Beam Computed Tomography / Q000295:instrumentation / Q000379:methods*; D007091:Image Processing, Computer-Assisted; D019047:Phantoms, Imaging