It is the difference but it is on the tesselation of the left hemisphere. If you want it on the right hemisphere, then you need to perform the analysis on the right hemisphere.
doug
On 07/12/2013 02:37 AM, amirhossein manzouri wrote:
Is lh.lh-rh.thickness.sm00.mgh the left hemisphere overlay or the stack of voxel-wise cortical thickness difference between left and right hemisphere of each subject? I need to see the difference map of left and right (lh-rh) overlaid on both hemispheres!
On Thu, Jul 11, 2013 at 6:01 PM, Douglas N Greve <greve@nmr.mgh.harvard.edu <mailto:greve@nmr.mgh.harvard.edu>> wrote:<mailto:greve@nmr.mgh.harvard.edu
The first command loads the left hemisphere overlay onto the right
hemisphere. Why do you want to do this?
doug
On 07/11/2013 11:13 AM, amirhossein manzouri wrote:
As I mentioned before in my second question :
tksurfer fsaverage_sym rh inflated -aparc -overlay
lh.lh-rh.thickness.sm00.mgh
tksurfer fsaverage_sym lh inflated -aparc -overlay
lh.lh-rh.thickness.sm00.mgh
For Right and Left side!
BR
On Thu, Jul 11, 2013 at 4:38 PM, Douglas Greve
<greve@nmr.mgh.harvard.edu <mailto:greve@nmr.mgh.harvard.edu><mailto:greve@nmr.mgh.harvard.edu
<mailto:greve@nmr.mgh.harvard.edu>>> wrote:
I don't know what you mean by overlaying the results on L & R.
What is your command line?
On 7/11/13 3:34 AM, amirhossein manzouri wrote:
Thanks Doug,
When I overlay the results on L & R , I see different
patterns on
each hemisphere. Is it something that I don't
understand correctly?
BR
On Wed, Jul 10, 2013 at 5:45 PM, Douglas N Greve
<greve@nmr.mgh.harvard.edu
<mailto:greve@nmr.mgh.harvard.edu><mailto:Freesurfer@nmr.mgh.harvard.edu
<mailto:greve@nmr.mgh.harvard.edu>>> wrote:
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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-- Best regards,
Amirhossein Manzouri
-- Best regards,
Amirhossein Manzouri
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--
Best regards,
Amirhossein Manzouri
--
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MGH-NMR Center
greve@nmr.mgh.harvard.edu
Phone Number: 617-724-2358
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