Re: [Freesurfer] Longitudinal - varying geometries

2015-04-01 Thread Pedro Rosa - GMail
Thanks, Martin. It is unfortunate to hear such news, but they are of course accurate. Hopefully this affects a small subset of subjects, and I will be able to add a covariate to it. Regards, Pedro Rosa. On Wednesday, April 1, 2015 at 12:30 PM, Martin Reuter wrote: > Hi Pedro, > > there is re

Re: [Freesurfer] Longitudinal - varying geometries

2015-04-01 Thread Martin Reuter
Hi Pedro, there is really no way to fix it. Especially if all you subjects changed acquisition. If it is only a small subset, you can then include a co-variable to account for this in your stats. You should then also test whether one group has more of these cases than the other, or if it is d

Re: [Freesurfer] Longitudinal - varying geometries

2015-04-01 Thread Pedro Rosa
Hi Martin, Thank you for your answer. Is there a way to fix it? Can reslicing help? Or to try compenate for it in the processing or statistics? Regards -- Pedro Rosa > On Apr 1, 2015, at 12:13, Martin Reuter wrote: > > Hi Pedro, > > yes, there was a bug (well, not really a bug but the check w

Re: [Freesurfer] Longitudinal - varying geometries

2015-04-01 Thread Martin Reuter
Hi Pedro, yes, there was a bug (well, not really a bug but the check was oversensitive). It was testing too many image parameters, some of them could be problematic (e.g. different voxel sizes across time), and some not. Looking at your attached files, you can see that the voxel sizes differ

[Freesurfer] Longitudinal - varying geometries

2015-04-01 Thread Pedro Rosa - Gmail
Dear FreeSurfers, I have read in the Mailing list (http://www.mail-archive.com/freesurfer%40nmr.mgh.harvard.edu/msg32753.html and others) other users asking questioning in regard of a Warning from FreeSurfer 5.3 longitudinal pipeline (-base step): \n**