It is a little tricky because you don't want to use different masks for
different subjects. I recommend using CVS where I've created a
subcoritcal mask in 2mm space (mri.2mm). So the idea would be that you
map your subcortical MG map to CVS space, then smooth it (mri_fwhm)
specifying the subcortical mask in
$FREESURFER_HOME/subjects/cvs_avg35_inMNI152/mri.2mm. You can then
concatenate the different subjects together to do your group analysis
On 1/18/18 5:14 PM, John Anderson wrote:
Dear Dr Greve,
Thank you so much for the quick response.
Just to confirm that I understood the procedure correctly. The
analysis is volume based (i.e. voxel-wise) for the subcortical
structures using mask created by freesurfer's "mri_binarize" for these
regions.
Correct?
-------- Original Message --------
On January 18, 2018 4:34 PM, John Anderson
<john.ande...@protonmail.com> wrote:
It is volume-based for subcortical
On 1/12/18 8:17 AM, John Anderson wrote:
Dear Dr Greeve,
I interestingly read the manuscript "Different partial volume
correction methods lead to different conclusions: An (18)F-FDG-PET
study of aging" Thank you for publishing this data.
I understood from this paper that he recommended stream for PVC is to
correct the PET images using Muller-Gartner method then feed the
corrected maps into three group level analyses: surface based for
left and right hemispheres then for subcortical regions..
My question is about the subcortical analysis: To describe this
analysis, is it a volumetric analysis for subcortical gray matter, or
surface based?
I am sorry if my questions is basics, I don't have good experience in
freesurfer so I want to be sure that I am using the correct terms.
Thanks you for any advice!
John
_______________________________________________
Freesurfer mailing list
Freesurfer@nmr.mgh.harvard.edu
https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
_______________________________________________
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.
