Dear Liwen, We rebuilt the atlas and there were also minor changes in the code, so the volume won’t be exactly the same. Having said that, if you plot 6 vs dev volumes, they should be highly correlated. Cheers, /E
Juan Eugenio Iglesias Senior research fellow CMIC (UCL), MGH (HMS) and CSAIL (MIT) http://www.jeiglesias.com
From: freesurfer-bounces@nmr.mgh.harvard.edu on behalf of Liwen Zhang lw.zhang@yahoo.com Reply-To: Freesurfer support list freesurfer@nmr.mgh.harvard.edu Date: Sunday, 22 September 2019 at 10:40 To: "freesurfer@nmr.mgh.harvard.edu" freesurfer@nmr.mgh.harvard.edu Subject: [Freesurfer] help! Hippocampal subfield segmentation with FS development version
External Email - Use Caution Hello freesurfer experts,
I previously applied hippocampal subfield segmentation using FS v.6.0. I am now trying to devide subfields into head/body where applicable using FS development version (latest version). However, I encountered the following problems/quesetions:
1) X represents certain subfield (volume) X_head + X_body (from FS dev) ~= X (from FS v.6.0)
What possibly causes this volume discrepancy between FS dev and FS v.6.0? Is the head/body segmentation template in FS dev based on the same ex-vivo template as used in FS v.6.0?
2) Related to 1), subfield volume as obtained from FS v.6.0 generally larger than that from FS dev (not for all subfields though)
I processed T1 images with FS v.6.0 and then applied hippocampal segmentation with both FS v.6.0 and FS dev.
Any suggestions/comments would be greatly appreicated!
Thank you for your time and help in advance!
Best, Liwen