Dear Bruce,
Attached is the screen shot of the results of the segmentation of the perirhinal Roi with Freesurfer V6. Unfortunately, as with V5 the segmented Roi does not cover the entire cortical thickness of the region. Is there any other alternative to get a better segmentation of this region?
Many thanks in advance,
Best regards,
Mohamed
----- Mail original ----- De: "Bruce Fischl" fischl@nmr.mgh.harvard.edu À: "Freesurfer support list" freesurfer@nmr.mgh.harvard.edu Envoyé: Mardi 9 Janvier 2018 14:50:16 Objet: Re: [Freesurfer] freesurfer segmentation: perirhinal Roi
Hi Mohamed
I'm pretty sure this was an issue with the ribbon-filling in V5 that is better in V6. Try using it and see if it is fixed.
cheers Bruce On Tue, 9 Jan 2018, m.bahri@uliege.be wrote:
Dear Freesurfer experts,
We would like to use volume and cortical thickness measures obtained for the perirhinal cortex in Freesurfer 5. When checking the region that has been segmented (using lh/rh.perirhinal.label), we noticed that the ROI does not seem to cover the entire cortical thickness of the region. On the coronal slice shown in example (attached file), one can see that there are still a few voxels of gray matter between the external border of the ROI and the external boundary of the cortex. How reliable is this segmentation? Is there a reason why the ROI appears so thin?
Many thanks in advance,
Best regards,
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