Dear all,
I used the the 3 steps of longitudinal analysis explained in freesurfer longitudinal tutorial and need to compute the ratio Parenchyma/CSF for each of time points. Is this equivalent to compute the (total gray matter volume + total cortical matter volume)/CSF from aseg.stats file ?
Thank you, Mahmoud
You probably want something like BrainSegNotVent/Sum(CSF and Ventricles) Is that what you mean? doug
On 10/26/14 11:45 PM, Mahmoud wrote:
Dear all,
I used the the 3 steps of longitudinal analysis explained in freesurfer longitudinal tutorial and need to compute the ratio Parenchyma/CSF for each of time points. Is this equivalent to compute the (total gray matter volume + total cortical matter volume)/CSF from aseg.stats file ?
Thank you, Mahmoud
Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
Dear Doug,
The problem is that I'm not sure what those terms exactly mean ! i.e. what is exactly CSF ? ventricles contain CSF right ? Is CSF counts for subdural CSF too ? I have a the aseg.stats with all terms inside but not sure which one to pick up, that's why I'm asked here.
Thank you, Mahmoud
On Mon, Oct 27, 2014 at 9:35 AM, Douglas Greve greve@nmr.mgh.harvard.edu wrote:
You probably want something like BrainSegNotVent/Sum(CSF and Ventricles) Is that what you mean? doug
On 10/26/14 11:45 PM, Mahmoud wrote:
Dear all,
I used the the 3 steps of longitudinal analysis explained in freesurfer longitudinal tutorial and need to compute the ratio Parenchyma/CSF for each of time points. Is this equivalent to compute the (total gray matter volume + total cortical matter volume)/CSF from aseg.stats file ?
Thank you, Mahmoud
Freesurfer mailing listFreesurfer@nmr.mgh.harvard.eduhttps://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.
All CSF measures are ventricular, not sulcal. If you are in doubt, you can always load the aseg.mgz and see what labels correspond to what. You can also see
http://surfer.nmr.mgh.harvard.edu/fswiki/MorphometryStats
doug
On 10/27/14 9:40 AM, Mahmoud wrote:
Dear Doug,
The problem is that I'm not sure what those terms exactly mean ! i.e. what is exactly CSF ? ventricles contain CSF right ? Is CSF counts for subdural CSF too ? I have a the aseg.stats with all terms inside but not sure which one to pick up, that's why I'm asked here.
Thank you, Mahmoud
On Mon, Oct 27, 2014 at 9:35 AM, Douglas Greve <greve@nmr.mgh.harvard.edu mailto:greve@nmr.mgh.harvard.edu> wrote:
You probably want something like BrainSegNotVent/Sum(CSF and Ventricles) Is that what you mean? doug On 10/26/14 11:45 PM, Mahmoud wrote:Dear all, I used the the 3 steps of longitudinal analysis explained in freesurfer longitudinal tutorial and need to compute the ratio Parenchyma/CSF for each of time points. Is this equivalent to compute the (total gray matter volume + total cortical matter volume)/CSF from aseg.stats file ? Thank you, Mahmoud _______________________________________________ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu <mailto:Freesurfer@nmr.mgh.harvard.edu> https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer_______________________________________________ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu <mailto: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.
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Douglas Greve -
Mahmoud