Hello Doug,
I have two different separations that I would like to achieve. Both are about a finer subdivision of the cortex:
1) I would like to separate the volume fractions between two directly neighboring cortical regions (close in 2-D surface space). 2) I would like to separate the volume fractions between two neighboring gyri (close together in 3-D space but far away from each other in 2-D space).
My naive idea is to generate new sub-segmentations of the cortex. Since they are for highly specialized applications I will most probably need to generate them by myself. Is that possible or is there another way to achieve this in FreeSurfer that I am not aware of?
Best Joerg ________________________________ From: freesurfer-bounces@nmr.mgh.harvard.edu freesurfer-bounces@nmr.mgh.harvard.edu on behalf of Greve, Douglas N.,Ph.D. DGREVE@mgh.harvard.edu Sent: Tuesday, September 10, 2019 11:48 AM To: freesurfer@nmr.mgh.harvard.edu freesurfer@nmr.mgh.harvard.edu Subject: Re: [Freesurfer] Custom Segmentation of the Cortex usable with mri_compute_volume_fractions
Do you mean you want to separate the volume fractions between two adjacent segmentations rather than just all of cortex?
On 9/10/19 10:04 AM, Pfannmoeller, Joerg Peter wrote:
Hello,
I would like to generate a custom segmentation of the cortex. That segmentation should be restricted to a certain labeled region (e.g. a Brodmann Area). If possible I would also like to restrict the region to the lower half or upper half of the cortex. Let's call these new segmentations sub-segmentations. I would like to use mri_compute_volume_fractions with this segmentation to compute the volume fractions of the voxels in a scan that overlap with these new sub-segmentations of the cortex. Are there tools for this purpose in FreeSurfer?
Best Joerg
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