Hi Megha
looking at your images it's not clear to me where the gray/white boundary
is. Do you think it should be further out? One thing you can try is (if the
occipital white matter intensity in brain.mgz is <110) putting some control
points in the interior of the white matter. Or as Matt suggests, higher
resolution can help, but that may not be an option
cheers
Bruce
On
Tue, 10 Dec 2013, Megha K. wrote:
Dear Sir/Madam,
I am using freesurfer for 3T MRI analysis of visual cortical thickness in
elderly patients with ophthalmic disease. We are having a bit of trouble
with the accuracy of cortical segmentation in the visual cortex (namely the
pericalcarine region) as the cortex is quite thin in our patients (compared
to controls). You can see in the attached image that whilst there is smooth
cortical segmentation in the peri-calcarine region, the cortex is not
visible to the naked eye. If you have any ideas on improving accuracy, I
would be very grateful.
Thanks
Megha
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