Hi Megan, you do not need to worry about the voxels in the aseg where dura is labeled as cortex as long as the pial surface does not extend into the dura. doug
On 08/14/2012 05:44 PM, Herting, Megan wrote: > Hello, > > I am new to FreeSurfer and had a quick question about the calculation > of cortical volumes using the aparc2aseg. In the aseg images, > "cortical volume" is sometimes assigned to extra dura at the superior > midline of the brain. My understanding is that this dura will not > impact my final gray matter cortical volumes output by aparc2aseg as > the cortical ribbon masks are used by default to only calculate volume > for voxels that fall with in these masks (lh.ribbon.mgz and > rh.ribbon.mgz). Is this correct? (I.e. Should I be manually removing > the aseg areas of dura labeled as "cortical" if they fall outside the > pial surface/cortical ribbon, or will using aparc2aseg take care of > this for me? I want to verify that assuming the latter is indeed correct!) > > Thanks for your help! > Megan > > > --------------------------------------------------------------------- > CONFIDENTIALITY NOTICE: This e-mail message, including any attachments, > is for the sole use of the intended recipient(s) and may contain > confidential > or legally privileged information. Any unauthorized review, use, > disclosure > or distribution is prohibited. If you are not the intended recipient, > please > contact the sender by reply e-mail and destroy all copies of this > original message. > > --------------------------------------------------------------------- > > > > _______________________________________________ > Freesurfer mailing list > Freesurfer@nmr.mgh.harvard.edu > https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer -- Douglas N. Greve, Ph.D. MGH-NMR Center gr...@nmr.mgh.harvard.edu Phone Number: 617-724-2358 Fax: 617-726-7422 Bugs: surfer.nmr.mgh.harvard.edu/fswiki/BugReporting FileDrop: www.nmr.mgh.harvard.edu/facility/filedrop/index.html _______________________________________________ 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.
