I've run many hundreds of scans repeatedly and found variance between versions of FreeSurfer, but identical output within a version. Something must have changed between runs. Perhaps you could try comparing the log files and see where the deviations begin.

Mike Schmidt 


On Sep 5, 2017 10:54 AM, "Phoolan Devi" <phoolandevi1989@gmail.com> wrote:

I mean the hippocampal volume in the aseg... so, it's not normal?


Bruce Fischl Sat, 26 Aug 2017 11:24:44 -0700

do you mean the hippocampal volume in the aseg or in the subfields?
On Sat, 26 Aug 2017, anonymous anonymous wrote:
Hi all,
Without noticing I run recon-all twice on the same scan of the same subject and 
we noticed there are
some differences, at least in the hippocampal volume estimation.

Is it normal? If it is, why is it so? 


Thank you so much for your help

This is a great community!

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