Hi Irene,

both images should be smoothed the same. You only have two time points
in each subject? Which FreeSurfer version are you using? And these
images are from the *.long.base directories (or are they from the
independent runs)?

-Martin

On Thu, 2011-11-03 at 15:20 +0100, Irene Altarelli wrote:
> Dear Fs experts,
> 
> I am running a longitudinal dataset through the longitudinal pipeline,
> and noticed that for one subject, although we kept everything the same
> (sequence, coil etc) the two timepoints' brainmasks look different:
> timepoint one (in the attached snapshot, gs_tp1) looks as if it has been
> smoothed, compared to timepoint two (gs_tp2). I have checked some other
> images from this subject, and the same seems to occur for orig.mgz, but
> not for rawavg.mgz.
> 
> Any idea on what could be causing the difference would be greatly
> appreciated.
> 
> Thanks in advance,
> Irene
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