Compressed Sensing MRI Reconstruction from Highly Undersampled -Space Data Using Nonsubsampled Shearlet Transform Sparsity Prior

Figure 4

Comparison of reconstruction results for T2wBrain_slice_10. (a) Reconstructed image from fully sampled data (256 × 256), (b) -space sampling mask of variable density random sampling with 24.96% sampling rate, (c)~(g) reconstruction using TV-CG, zero-filling, ODWT-based, SFLCT-based, and NSST-based CS-MRI, respectively, and (a1), (c1)~(g1) and (a2), (c2)~(g2) zoom-in of (a), (c)~(g) for two different regions, respectively. The PSNRs of them are 34.08, 28.65, 33.99, 34.95, and 37.45, respectively.