Hardware Implementation on the Weight Calculation of Iterative Algorithm for CT Image Reconstruction

被引：2
作者：
Cao, Xixin [1 ]
Ma, Kaisheng [1 ]
Lian, Renchun [1 ]
Zhang, Qihui [2 ]
机构：
[1] Peking Univ, Sch Software & Microelect, Beijing, Peoples R China
[2] Henan Univ, Sch Phys & Elect, Kaifeng, Henan, Peoples R China
来源：
ETRI JOURNAL | 2013年 / 35卷 / 05期
关键词：
Weight calculation; circular pixel model; segmentation method; simulation; FPGA;
D O I：
10.4218/etrij.13.0212.0569
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
The weight calculation in an iterative algorithm is the most computationally costly task in computed tomography image reconstruction. In this letter, a fast algorithm to speed up the weight calculation is proposed The classic square pixel rotation approximate calculation method for computing the weights in the iterative algorithm is first analyzed and then improved by replacing the square pixel model with a circular pixel model and the square rotation approximation with a segmentation method of a circular area. Software simulation and hardware implementation results' show that our proposed scheme can not only improve the definition of the reconstructed image but also accelerate the reconstruction.
引用
收藏
页码：931 / 934
页数：4
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