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Dual-energy CT technology and spectrum estimation algorithm
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Paper Abstract

Dual-energy X-ray computed tomography (DECT) can accurately reconstruct the effective atomic number and electron density distribution. Currently, it is an effective material identification technology for security inspections. X-ray energy spectrum estimation plays an important role in dual-energy CT. First, the reconstruction principle of dual-energy CT is introduced. Second, based on common transmission data estimation method, this paper focuses on spectrum estimation using CT image reprojection technology. By scanning the cylindrical model which contain two materials and using the maximum expectation algorithm (EM) to estimate the X-ray energy spectrum distribution, the simulated spectrum of Monte Carlo was used as the initial value of iteration. This method improves the accuracy of dual-energy CT reconstruction algorithm.

Paper Details

Date Published: 11 May 2019
PDF: 9 pages
Proc. SPIE 11068, Second Symposium on Novel Technology of X-Ray Imaging, 1106810 (11 May 2019); doi: 10.1117/12.2524098
Show Author Affiliations
Liyuan Chen, First Research Institute of the Ministry of Public Security (China)
Bin Li, First Research Institute of the Ministry of Public Security (China)
Yongqing Li, First Research Institute of the Ministry of Public Security (China)


Published in SPIE Proceedings Vol. 11068:
Second Symposium on Novel Technology of X-Ray Imaging
Yangchao Tian; Tiqiao Xiao; Peng Liu, Editor(s)

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