Hi Dr. Fischl,

Thank you so much for your reply.

I have this SMA activation from a fMRI task. I am interested in getting cortical thickness of exactly the same area. Its showing activation in both hemispheres. I am also attaching here screen shot to make it more clear how it looks like. To do that, thats correct, I am trying to draw both left and right SMA thickness.

Thanks.

On Wed, Feb 1, 2017 at 2:46 PM, Bruce Fischl <fischl@nmr.mgh.harvard.edu> wrote:

Hi Sahil

can you clarify what you mean. Do you have the left hemi SMA labeled in MNI space and it (incorrectly) extends into the right hemi? Or are you trying to draw both the left and the right SMA?

Bruce

On Wed, 1 Feb 2017, Sahil Bajaj wrote:

Hi everyone,
I have supplementary motor area (SMA) defined in standard MNI volume space
and I would like to extract cortical thickness for this area. I have 80% of
SMA in left hemisphere and 20% on right hemisphere. So I am stuck at the
command mri_vol2surf before proceeding to mri_segstats.

In mri_vol2surf, I am not sure what should I specify for --hemi i.e. whether
its left or right hemisphere (lh or rh). If I specify e.g. lh, then would
not it convert left hemisphere SMA voxels to surface and later on extract
the measure from left hemisphere only and vice-versa for right hemisphere.

I am not sure how would that work if portion of ROI is on both hemispheres
and how can I run mri_vol2surf command?

Thanks,
Sahil

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