Hardware Implementation on the Weight Calculation of Iterative Algorithm for CT Image Reconstruction. Issue 5 (1st October 2013)

• Record Type: Journal Article
• Authors: Cao, Xixin; Ma, Kaisheng; Lian, Renchun; Zhang, Qihui
• Is Part Of: ETRI journal. Volume 35:Issue 5(2013)
• Page Start: 931
• Page End: 934
• Publication Date: 2013-10-01
• Subjects: Weight calculation -- circular pixel model -- segmentation method -- simulation -- FPGA; Telecommunication -- Periodicals; Electronics -- Periodicals; Electronics; Telecommunication; Periodicals; Periodicals; 621.38205
• DOI: 10.4218/etrij.13.0212.0569
• Languages: English
• ISSNs: 1225-6463

Abstract

Abstract : 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.