Figure 4.

Qualitative results in representative slices from the images (A) directly acquired, (B) reconstructed by SISR, and (C) reconstructed by our approach, respectively, on the simulated data set. The slices directly acquired and formed by SISR were much noisy as compared to our reconstructions. The noise was more prominent for SISR in the voxels from the skull, as highlighted by the red arrows. Although what we were interested in were CSF, GM, and WM, the noisy voxels from the skull rendered that SISR generated noise all over the images but just not as obvious as those from the skull.