Filtered back-projection image reconstruction algorithm for opposite parallel linear CT scanning

被引：0
|
作者：
Wu W. [1 ,2 ]
Quan C. [1 ]
Liu F. [1 ,2 ]
机构：
[1] Key Laboratory of Optoelectronic Technology and Systems of the Ministry of Education, Chongqing University, Chongqing
[2] Engineering Research Center of Industrial Computed Tomography Nondestructive Testing of the Ministry of Education, Chongqing University, Chongqing
来源：
Guangxue Xuebao/Acta Optica Sinica | 2016年 / 36卷 / 09期
关键词：
Computed tomography; Filtered back-projection; Image reconstruction; Imaging systems; Limited angle; Opposite parallel linear scanning;
D O I：
10.3788/AOS201636.0911009
中图分类号：
学科分类号：
摘要：
The computed tomography setup for the opposite parallel linear scanning (OPLCT) of X-ray source and detectors is simple in structure and feasible to achieve portability or mobility. The order subset-simultaneous algebraic reconstruction algorithm has been used in the preliminary studies, but its image reconstruction time is too long to realize fast imaging. To address this problem, we proposed a filtered back-projection algorithm for OPLCT (OPLFBP) based on the Fourier's theorem. A single translation (1T) model was constructed for image reconstruction, while this model results in limited angle problem and cannot completely reconstruct the object image using the OPLFBP algorithm. Further, a multiple translation (MT) model was proposed, and meanwhile, models for two orthogonal translations (2T) and three symmetrical translations (3T) were constructed respectively. The simulation results for the 1T, 2T and 3T modes show that the OPLFBP algorithm is effective, and the 2T and 3T scanning modes and the traditional circular scanning mode are comparable in terms of reconstrution time and image quality. © 2016, Chinese Lasers Press. All right reserved.
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页数：11
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