I often see in papers that the first two preprocessing steps they use are:
First, compensation of systematic, slice-dependent timeshifts.
Second, elimination of systematic odd-even slice intensity differences caused by interleaved acquisition.
I’m a little confused with the second… Aren’t odd-even slice intensity differences caused by slice-dependent timeshifts as well? Aren’t these two steps talking about similar things?
Also, I understand that you can deal with one of these problems in afni using interpolation (tshift), right? What about the other?
Thanks for your advice.