External Email - Use Caution

Hi Sophie. No output is better than the other. If you have run all your subjects with both, I'd say to take the average!

Sent from my phone, please excuse brevity and typos

________________________________ From: freesurfer-bounces@nmr.mgh.harvard.edu freesurfer-bounces@nmr.mgh.harvard.edu on behalf of Dean, Sophie sophie.l.dean@kcl.ac.uk Sent: Wednesday, August 8, 2018 6:15:42 PM To: freesurfer@nmr.mgh.harvard.edu Subject: [Freesurfer] Mismatching hippocampal output

External Email - Use Caution

Dear FreeSurfer developers,

As I understand it is recommended data is processed using the same OS. However, it also states on the FreeSurfer webpage that there is an exception for some post-processing tools.

Recon-all was first done with:

FreeSurfer version: freesurfer-Darwin-OSX-stable-pub-v6.0.0-2beb96c

Platform: Darwin Kernel Version 17.4.0

Post-processing for hippocampal segmentation was done separately on two different machines with different operating systems:

1) FreeSurfer version: freesurfer-Linux-centos6_x86_64-stable-pub-v6.0.0-2beb96c

Platform: Linux Version 2.6.32-696.23.1.el6.x86_64

2) FreeSurfer version: freesurfer-Darwin-OSX-stable-pub-v6.0.0-2beb96c

Platform: Darwin Kernel Version 17.7.0

Both have slightly different volume outputs. Is this difference due to software/OS differences? Which output would you recommend using?

I have attached recon-all logs in case they are of use for my inquest.

With thanks and kind regards,

Sophie