Sparse Constrained Reconstruction for Accelerating Parallel Imaging Based on Variable Splitting Method

Figure 5

Iteration convergence process of reconstructing MR image for actual parallel MRI. The reconstruction method is the proposed algorithm described in Section 3.4, and (15) and (21) are, respectively, used for the subproblem with respect to 𝑓, where NCG descent algorithm with backtracking line search algorithm is used to solve (15) and (21).