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A New Non-Convex Regularized Sparse Reconstruction Algorithm for Compressed Sensing Magnetic Resonance Image Recovery

By Xiangjun Yin, Linyu Wang, Huihui Yue, and Jianhong Xiang
Progress In Electromagnetics Research C, Vol. 87, 241-253, 2018


Compressed sensing (CS) relies on the sparse priorin posed on the signal to solve the ill-posed recovery problem in an under-determined linear system (ULS). Motivated by the theory, this paper proposes a new algorithm called regularized re-weighted inverse trigonometric smoothed function approximating L0-norm minimization (RRITSL0) algorithm, where the inverse trigonometric (IT) function, iteratively re-weighted scheme and regularization mechanism constitute the core of the proposed RRITSL0 algorithm. Compared with other state-of-the-art functions, our proposed IT function cluster can better approximate the L0-norm, thus improving the reconstruction accuracy. And the new re-weighted scheme we adopted can promote sparsity and speed up convergence. Moreover, the regularization mechanism makes the RRITSL0 algorithm more robust against noise. The performance of the proposed algorithm is verified via numerical experiments with additive noise. Furthermore, the experiments prove the superiority of the RRITSL0 algorithm in magnetic resonance (MR) image recovery.


Xiangjun Yin, Linyu Wang, Huihui Yue, and Jianhong Xiang, "A New Non-Convex Regularized Sparse Reconstruction Algorithm for Compressed Sensing Magnetic Resonance Image Recovery," Progress In Electromagnetics Research C, Vol. 87, 241-253, 2018.


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