Dear Donatas,
I believe that mri_segstats is just counting voxels using the hard segmentation, whereas the volume in lh.hippoSfVolumes-T1.long.v20.txt is obtained using a soft segmentation. If you’re interested in this, look up the WRITE_POSTERIORS option in the wiki.
Cheers,
/Eugenio
--
Juan Eugenio Iglesias
ERC Senior Research Fellow
Translational Imaging Group
University College London
http://www.jeiglesias.com
http://cmictig.cs.ucl.ac.uk/
On 21/11/2017, 18:00, "freesurfer-bounces@nmr.mgh.harvard.edu on behalf of Donatas Sederevicius" <freesurfer-bounces@nmr.mgh.harvard.edu on behalf of donatas.sederevicius@psykologi.uio.no> wrote:
Dear Freesurfer Developers,
I’ve run the new longitudinal hippocampal subfields segmentation using Freesurfer’s developer version. Then I decided to extract stats for each hierarchy: HBT, FS60 and CA. I used the following command, for example:
mri_segstats —seg lh.hippoAmygLabels-T1.long.v20.CA.mgz —ctab-default —sum output.txt
I got what I wanted but decided to compare the results of one subject for Hippocampal_tail for each hierarchy and with the text file lh.hippoSfVolumes-T1.long.v20.txt. I got the following volume values:
lh.hippoSfVolumes-T1.long.v20.txt: 583.65
HBT: 593.4
FS60: 593.4
CA: 598.3
I wonder how do you actually extract stats that are present in lh.hippoSfVolumes-T1.long.v20.txt file? What is the reason for different values? I’m very curious since I cannot get the exact same stats as in the lh.hippoSfVolumes-T1.long.v20.txt file.
Thanks a lot!
Donatas
_______________________________________________
Freesurfer mailing list
Freesurfer@nmr.mgh.harvard.edu
https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
The information in this e-mail is intended only for the person to whom it is
addressed. If you believe this e-mail was sent to you in error and the e-mail
contains patient information, please contact the Partners Compliance HelpLine at
http://www.partners.org/complianceline . If the e-mail was sent to you in error
but does not contain patient information, please contact the sender and properly
dispose of the e-mail.