Figure 8.

Qualitative results in representative slices of the images reconstructed by the five SRR methods. Our approach achieved the best qualitative performance with regarding to the image contrast and sharpness, in particular, on the delineation of the structures of the hippocampus as shown in the coronal and sagittal planes. The TV method sharpened the image excessively, resulting in the noisy reconstruction. Our approach appropriately suppressed the noise contamination while enhancing the sharpness of the image edges. The images reconstructed by IAA, NLU, and SRCNN contained artifacts caused by averaging the images transformed due to the alignment, as highlighted by the red arrows. In contrast, our approach was not affected by the alignment.