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Fig.a: Synthetic SRR scenario from a real acquisition. a.i: b = 0 image. a.ii: Axial down-sampled b = 0 image with a factor of 4. a.iii: Mean of the b = 0 images of the LR acquisitions. a.iv: SRR of the b = 0 image. The SRR is better contrasted and is less blurry than the mean. Fig.b and Fig.c: Quantitative evaluation of the reconstruction accuracy in term of PSNR for the two- and four- down-sampling factors, for each of the thirty gradient directions (x axis).
