Fast reconstruction method for sparse MR image
稀疏MR图像重构的快速算法

An alternating minimization method for the reconstruction of MR images with wavelet sparsity,including the convergence analysis of this algorithm,is presented in this paper.Our algorithm is base on a half-quadratic penalty method.The optimization problem with wavelet sparsity is splited into two sub-problems:the X-subproblem and the Y-subproblem.The solution for the original problem can be obtained by alternately solving the two subproblems,in which the Y-subproblem is solved via a 1D soft-thresholding or s...