On 04/20/2017 10:21 AM, John Anderson wrote: > Thank you a.y, > I am sorry if my question was not clear enough! > In Qdec/ tab "design" the user have the choice to choose the analyses > that he wants to conduct on aseg,mgz, wmparc.mgz or aparc+aseg.mgz. > These atlases report white and gray matter volumes. > > in Qdec, if I choose volume from the dropdown menu "measure" under the > tab "design" to conduct surface based analyses. Dose this means > surface based analyses for gray matter volume or white matter volume? GM volume > In aseg you can find both volumes for whit matter and gray matter. so > which volume is Qdec referring to? If Qdec compute surface based > analysis of gray matter volume, then how can I do surface based > analysis using the whiate matter volume of the parcellates instead of > the gray matter voluem of the parcellaets? Is this feasible you can't do surface-based analysis of WM > > J. > > > > >> -------- Original Message -------- >> Subject: RE: [Freesurfer] White matter atrophy >> Local Time: April 20, 2017 10:04 AM >> UTC Time: April 20, 2017 2:04 PM >> From: ayend...@mgh.harvard.edu >> To: John Anderson <john.ande...@protonmail.com>, Freesurfer support >> list <freesurfer@nmr.mgh.harvard.edu> >> >> >> Hi John - Unless someone else has a better idea, the aseg >> (subcortical segmentation) contains left and right cerebral and >> cerebellar white matter labels. You can look at the ROI analysis >> tutorial for how to extract stats from aseg labels. >> >> Best, >> a.y >> >> >> ------------------------------------------------------------------------ >> >> *From:* freesurfer-boun...@nmr.mgh.harvard.edu >> [freesurfer-boun...@nmr.mgh.harvard.edu] on behalf of John Anderson >> [john.ande...@protonmail.com] >> *Sent:* Thursday, April 20, 2017 7:42 AM >> *To:* freesurfer@nmr.mgh.harvard.edu >> *Subject:* [Freesurfer] White matter atrophy >> >> Dear Freesurfer experts, >> I know how to do cortical thickness group analysis using Freesurfer, >> also I know how to use Qdec to compare groups regarding gray matter >> volume differences, cortical thickness, curvatures, area,... etc. >> I am wondering if there is any way in Freesurfer to study the >> difference in white matter volume between two groups? >> >> I highly appreciate any suggestion! >> John >> >> >> >> >> 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. >> >> > > > > _______________________________________________ > Freesurfer mailing list > Freesurfer@nmr.mgh.harvard.edu > https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
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