Re: [Freesurfer] Xhemi: vertex-wise volume asymmetry analysis?

Hi Doug,

I just read from the .log files that the lh.thickness/area/pial/... files in subject/xhemi/surf are copied from subject/surf at the end of the command. Thus it seems that I can just copy lh.volume, too?

Thanks, Cherry

On Mon, Apr 28, 2014 at 6:25 PM, Yizhou Ma ym850@nyu.edu wrote:

Thanks Doug. I don't see an error message in xhemireg.?h.log files. Please see attached for the files.

On Mon, Apr 28, 2014 at 4:22 PM, Douglas N Greve < greve@nmr.mgh.harvard.edu> wrote:

...

Then something went wrong along the way. Check the xhemi/xhemireg.?h.log to see if there is an error. If not, send the log file to me

On 04/28/2014 04:14 PM, Yizhou Ma wrote:

...

Thanks Doug. I have ?h.volume in subject/surf but not in subject/xhemi/surf. I followed this page http://surfer.nmr.mgh.harvard.edu/fswiki/Xhemi and I think it is a problem with surfreg rather than mris_preproc. Can I just copy the ?h.volume from subject/surf to subject/xhemi/surf?

Best, Cherry

On Mon, Apr 28, 2014 at 4:01 PM, Douglas N Greve <greve@nmr.mgh.harvard.edu mailto:greve@nmr.mgh.harvard.edu> wrote:

There should be a ?h.volume file. Are you sure there is not? You can
specify -meas volume when you run mris_preproc
doug

On 04/27/2014 08:35 PM, Yizhou Ma wrote:
> Dear freesurfer experts,
>
> I am working on a project on cortical asymmetry and I have

analyzed

...

> vertex-wise cortical thickness/surface area asymmetry. However, I
> noticed that Freesurfer doesn't not seem to facilitate such

analysis

...

> for gray matter volume, as after running surfreg -xhemi there is

no

...

> ?h.volume file in subject/xhemi/surf. I searched the literature

and

...

> found studies on gray matter density asymmetry with VBM and
ROI-based
> volume asymmetry. Is it true that Freesurfer doesn't offer
vertex-wise
> volume asymmetry analysis? And may I know the rationale?
>
> Thanks,
> Cherry
>
>
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--
Douglas N. Greve, Ph.D.
MGH-NMR Center
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