Dear experts,
I downloaded the baseline rsfMRI cohort from the PPMI (Parkinson's Progressive Marker Initiative) in both 3D and 4D Nifti format, but there is a spatial shifting in the slices, a shifting slope every 8 slices approximately (I attached an image). I wonder if somebody in the mailing list has worked before with these images and faced this problem. Previous publications using this public database only mentiond that the acquisition was ascending but nothing is explained about slice spatial alignment, also documentation on internet and from the PPMI webpage do not mention this slice shifting.
Has somebody seen this problem?
Many thanks for your help,
Luis R. Peraza
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