An iterative dual energy CT reconstruction method for a K-edge contrast material

2011 ◽  
Author(s):  
M. Depypere ◽  
J. Nuyts ◽  
N. van Gastel ◽  
G. Carmeliet ◽  
F. Maes ◽  
...  
Keyword(s):  
Contrast Material ◽  
Dual Energy ◽  
Dual Energy Ct ◽  
Reconstruction Method ◽  
Ct Reconstruction ◽  
Edge Contrast

Improvement on Dual Energy CT Reconstruction Method With Reduced Data

2013 ◽  
Author(s):  
Yuanyuan Liu ◽  
Peng Zheng ◽  
Chunming Zhang
Keyword(s):  
Relative Error ◽  
Dual Energy ◽  
Dual Energy Ct ◽  
Reconstruction Method ◽  
Ct Reconstruction ◽  
Ill Posed ◽  
Security Inspection ◽  
The Cost ◽  
Reduced Data ◽  
Wide Usage

Dual energy CT (DECT) has become a hot topic for its high detection precision and robust material identification ability in the field of nuclear safety and security inspection. However, the high cost of the system becomes a big limitation for its wide usage. To solve this problem, in 2009, we have proposed a dual energy CT reconstruction method with reduced data (DECT-RD) requiring much fewer data to reduce the cost of detectors. However, it is a simple idea without more analyzing in the process of solving ill-posed equations. In this paper, we tried to solve ill-posed equations with constraint condition (DECT-RDCC) and least squares (DECT-RDLS) respectively. Numerical simulations are done by using DECT-RD, DECT-RDCC and DECT-RDLS in the same situation, only 7 dual energy detector bins instead of 256 complete bin sampling in each projection. Results demonstrated that DECT-RDCC with relative error less than 1.1% is better than DECT-RD with relative error less than 1.8% while DECT-RDLS plays a more exact and steady role with relative error less than 0.6% than DECT-RDCC. Hence, DECT-RDLS is a better method used to obtain much lower system cost. We believe this work will drive DECT into wide usage.

Image reconstruction method of dual energy CT for multilayer spherical shell with great density difference

2015 ◽  
Vol 27 (4) ◽  
pp. 44002
Author(s):  
夏惊涛 Xia Jingtao ◽  
王群书 Wang Qunshu ◽  
马继明 Ma Jiming ◽  
李斌康 Li Binkang ◽  
宋朝晖 Song Zhaohui ◽  
...  
Keyword(s):  
Image Reconstruction ◽  
Spherical Shell ◽  
Dual Energy ◽  
Density Difference ◽  
Dual Energy Ct ◽  
Reconstruction Method ◽  
Great Density ◽  
Image Reconstruction Method

Dual-Energy CT for the Assessment of Contrast Material Distribution in the Pulmonary Parenchyma

2009 ◽  
Vol 193 (1) ◽  
pp. 144-149 ◽  
Author(s):  
Sven F. Thieme ◽  
Thorsten R. C. Johnson ◽  
Christopher Lee ◽  
Justin McWilliams ◽  
Christoph R. Becker ◽  
...  
Keyword(s):  
Contrast Material ◽  
Dual Energy ◽  
Dual Energy Ct ◽  
Material Distribution ◽  
Pulmonary Parenchyma
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