The acceleration algorithm for projection decomposition of dual-energy computed tomography image reconstruction based on projection matching.
10.7507/1001-5515.201605009
- Author:
Xiaowen HOU
1
;
Zipeng LU
1
;
Yueyang TENG
2
;
Dayu XIAO
1
;
Shengyu FAN
1
;
Chaoran YANG
1
;
Yujia LIU
1
;
Yan KANG
1
Author Information
1. Sino-Dutch Biomedical and Information School, Northeastern University, Shenyang 110169, P.R.China.
2. Sino-Dutch Biomedical and Information School, Northeastern University, Shenyang 110169, P.R.China.tengyueyang@126.com.
- Publication Type:Journal Article
- Keywords:
acceleration algorithm;
dual-energy computed tomography;
projection decomposition;
projection matching
- From:
Journal of Biomedical Engineering
2018;35(3):376-383
- CountryChina
- Language:Chinese
-
Abstract:
Dual-energy computed tomography (CT) reconstruction imaging technology is an important development direction in the field of CT imaging. The mainstream model of dual-energy CT reconstruction algorithm is the basis material decomposition model, and the projection decomposition is the crucial technique. The projection decomposition algorithm based on projection matching was a general method. With establishing the energy spectrum lookup table, we can obtain the stable solution by the least squares matching method. But the computation cost will increase dramatically when size of lookup table enlarges and it will slow down the computer. In this paper, an acceleration algorithm based on projection matching is proposed. The proposed algorithm makes use of linear equations and plane equations to fit the lookup table data, so that the projection value of the decomposition coefficients can be calculated quickly. As the result of simulation experiment, the acceleration algorithm can greatly shorten the running time of the program to get the stable and correct solution.
