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Hello AFNI experts!!

I am having an issue with my fMRI data. I found that when I do 3dinfo -slice_timing in my EPI images the timing is "0". We found a solution to "called back" the slice timing information 3dTcat  topup_corrected_Rest.nii -tpattern alt+z -prefix EPI_fixed.nii which seems to work. But when I want to use this “fixed” data, and do, for example 3dTshift, the slice timing is again reset to “0”.

Do you have any suggestions on how to address this?