title: NUFFT-Based Iterative Image Reconstruction via Alternating Direction Total Variation Minimization for Sparse-View CT.
abstract: Sparse-view imaging is a promising scanning method which can reduce the radiation dose in X-ray computed tomography (CT). Reconstruction algorithm for sparse-view imaging system is of significant importance. The adoption of the spatial iterative algorithm for CT image reconstruction has a low operation efficiency and high computation requirement. A novel Fourier-based iterative reconstruction technique that utilizes nonuniform fast Fourier transform is presented in this study along with the advanced total variation (TV) regularization for sparse-view CT. Combined with the alternating direction method, the proposed approach shows excellent efficiency and rapid convergence property. Numerical simulations and real data experiments are performed on a parallel beam CT. Experimental results validate that the proposed method has higher computational efficiency and better reconstruction quality than the conventional algorithms, such as simultaneous algebraic reconstruction technique using TV method and the alternating direction total variation minimization approach, with the same time duration. The proposed method appears to have extensive applications in X-ray CT imaging.
authors.affiliation: China National Digital Switching System Engineering and Technological Research Center, Zhengzhou 450002, China.
authors.forename: Bin
authors.initials: B
authors.lastname: Yan
authors.affiliation: China National Digital Switching System Engineering and Technological Research Center, Zhengzhou 450002, China.
authors.forename: Zhao
authors.initials: Z
authors.lastname: Jin
authors.affiliation: China National Digital Switching System Engineering and Technological Research Center, Zhengzhou 450002, China.
authors.forename: Hanming
authors.initials: H
authors.lastname: Zhang
authors.affiliation: China National Digital Switching System Engineering and Technological Research Center, Zhengzhou 450002, China.
authors.forename: Lei
authors.initials: L
authors.lastname: Li
authors.affiliation: China National Digital Switching System Engineering and Technological Research Center, Zhengzhou 450002, China.
authors.forename: Ailong
authors.initials: A
authors.lastname: Cai
mesh_terms: D000465:Algorithms; D003198:Computer Simulation; D005583:Fourier Analysis; D006801:Humans; D007091:Image Processing, Computer-Assisted; D015233:Models, Statistical; D019047:Phantoms, Imaging; D011857:Radiographic Image Interpretation, Computer-Assisted / Q000379:methods*; D015203:Reproducibility of Results; D012984:Software; D014057:Tomography, X-Ray Computed / Q000379:methods*; D014965:X-Rays