Hi,
Something about the transformation of the GE spirals to ANALYZE and afni formats seems to put everything about 20mm anterior of the anatomicals. Typically, to line things up, one doesn't want to resample data across subvoxels so I was thinking I could do the rough shift on the functionals. Does afni do the right thing if the shift matches a multiple of the voxel size and not change the data? For example, if I shift 7.5mm posterior and the voxels are 3.75mm can I assume that there is no resampling issue affecting the quality of the data?