Thanks to both of you.

On Mon, Apr 16, 2018 at 12:18 PM, Martin Reuter <mreu...@nmr.mgh.harvard.edu
> wrote:

> Hi Susanna,
>
> yes, as you feared, you should rerun the first time point so that all time
> points are run by the same version. Edits should be preserved (although
> maybe more or probably less edits would be necessary).
>
> And it is really a bad idea to compare across groups where the groups
> where processed with different software methods (here 5.3 an 6.0). You will
> not know if the differences that you find come from the methods or are
> real.
> Best, Martin
>
>
> On 13. Apr 2018, at 10:21, Susanna Carmona Cañabate <
> susannacarm...@gmail.com> wrote:
>
> Dear Freesurfers,
>
> We are running a longitudinal study with 4 time points. The first two time
> points were processed and edited with the 5.3 version of Freesurfer and the
> other two time points with FS6. I assume we have to re-run the first two
> time points with the new versión, but is there a way to preserve the
> editings?
>
> In the same line, on a transversal study, would it be a lot of bias if
> most of the subjects of one group are processed with version 5.3 and most
> of the subjects of the other group with FS6?
>
> Thanks a lot for your time
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