Investigation of BPF algorithm in cone-beam CT with 2D general trajectories

被引：0
作者：
Zou, Jing [1 ,2 ,3 ]
Gui, Jianbao [1 ,2 ]
Rong, Junyan [1 ,2 ]
Hu, Zhanli [1 ,2 ]
Zhang, Qiyang [1 ,2 ]
Xia, Dan [1 ,2 ]
机构：
[1] Chinese Acad Sci, Key Lab Hlth Informat, Shenzhen 518055, Guangdong, Peoples R China
[2] Chinese Acad Sci, Shenzhen Inst Adv Technol, Inst Biomed & Hlth Engn, Lauterbur Ctr Biomed Imaging Res, Shenzhen 518055, Guangdong, Peoples R China
[3] Tianjin Univ, Tianjin 300072, Peoples R China
来源：
JOURNAL OF X-RAY SCIENCE AND TECHNOLOGY | 2012年 / 20卷 / 03期
基金：
中国国家自然科学基金;
关键词：
Cone-beam computed tomography; 2D general trajectory; BPF algorithm; z-homogeneous phantom; IMAGE-RECONSTRUCTION; BACKPROJECTION; REGION;
D O I：
10.3233/XST-2012-343
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
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.
引用
收藏
页码：351 / 362
页数：12
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