On 07/10/2013 01:26 AM, amirhossein manzouri wrote:
> Dear Doug and FS experts,
> I am trying to use Xhemi tool to study asymmetry in the brain. I have
> done the exact procedure you mentioned in WiKi for a group of 40 controls.
> 1) Is lh.lh-rh.thickness.sm00.mgh the stack of voxel-wise cortical
> thickness difference between left and right hemisphere of each subject?

Yes.

> 2) If yes, shouldn't I see the similar mapping by overlaying this to
> lh and rh?
> (tksurfer fsaverage_sym rh inflated -aparc -overlay
> lh.lh-rh.thickness.sm00.mgh)

I don't know what you mean. Can you elaborate/

> 3) How do you interpret the result after analyzing within one group?
> ( tksurfer fsaverage_sym lh inflated -aparc -overlay
> glm.lh.lh-rh.thickness.sm05/osgm/sig.mgh)

It is the difference between left and right hemisphere at each vertex.

> 4) Is there any way to look at the results through the brain per slice
> and also the whole brain?

Do you mean mapping the difference into the volume and then viewing it
as a volume? If so, You can try mri_surf2vol
doug

>
> --
> Best regards,
> Amirhossein Manzouri
>
>
>
>

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--
Douglas N. Greve, Ph.D.
MGH-NMR Center
greve@nmr.mgh.harvard.edu
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