hi,
does anybody know whether realignement of epi data in nifti format in spm5
can take much more time than the old analyze version. only registering the
images (around 300) takes more than 120 minutes, compared to 15 minutes
with the analyze format on the same computer. i thought, nifti would be
much faster.
could it be due to changes of the defaults (6th instead of 4th b-spline
interpolation, quality 1 instead of 0.9, 2 mm separation instead of 4)?
by the way: what is the differences of 4d nifti(all volumes in one file) or
3d nifti (n single volumes) for working with spm5? if 4d is better, how can
i convert 3d files into one single 4d file?
thanks a lot
markus
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