Hello Anastasia,
Thank you for your reply! I had created the 4 WM lobes for each hemisphere to extract regional volumes for white matter lesions in each lobe. As some of our participants have WML in the corpus callosum very close to the midline, they are not included in the WM lobes created earlier. Do I need to manually edit the labels for the parts of the corpus callosum between the hemispheres to have them be included in one of the lobes ? Or is there some alternate way to split the CC in aseg.mgz along the hemispheric midline and assign its parts to the WM in each hemisphere ? Best, -Prad ________________________________ From: freesurfer-boun...@nmr.mgh.harvard.edu <freesurfer-boun...@nmr.mgh.harvard.edu> on behalf of Yendiki, Anastasia <ayend...@mgh.harvard.edu> Sent: Tuesday, January 17, 2017 5:05 PM To: Freesurfer support list Subject: Re: [Freesurfer] WM lobes and Corpus Callosum Hi Prad - mri_aparc2aseg assigns WM voxels to the nearest cortical region from the cortical parcellation. Which cortical region would you want to assign the corpus callosum to? What's labeled as corpus callosum in the aseg is the part of the corpus callosum between the 2 hemis. Best, a.y ________________________________ From: freesurfer-boun...@nmr.mgh.harvard.edu [freesurfer-boun...@nmr.mgh.harvard.edu] on behalf of Bharadwaj, Pradyumna - (prad) [p...@email.arizona.edu] Sent: Tuesday, January 17, 2017 5:37 PM To: freesurfer@nmr.mgh.harvard.edu Subject: [Freesurfer] WM lobes and Corpus Callosum Hi, I've been trying to create WM lobes using the following steps: 1) mri_annotation2label --lobesStrict 2) Outputting the labels from step 1, & creating a simpler annotation without limbic and insular lobes 3) Labeling the WM using mri_aparc2aseg (mri_aparc2aseg --s MySub --annot Step2AnnotationFile --labelwm --hypo-as-wm --wmpar-dmax 20 --rip-unknown However, as the corpus callosum is not labelled as wm, it is not included in any WM lobe. Is there any workaround to assigning the corpus callosum to the different WM lobes or do I have to manually edit aseg.mgz to change the corpus callosum's value to match that of WM ? Thanks, -Prad
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