on a voxel-by-voxel basis or averaged over an ROI?

On 12/04/2015 12:56 PM, Sabrina Yu wrote:
> Absolutely, sorry for the confusion. I am looking at decreased
> ipsilesional myelination signal intensity in patients with unilateral
> strokes. The goal is to run the T1 scans through FreeSurfer, then
> determine the ratio of signal intensity - contralesional: ipsilesional.
>
> Thanks,
> Sabrina
>
>
>
> On Thu, Dec 3, 2015 at 5:52 PM -0800, "Douglas Greve"
> <greve@nmr.mgh.harvard.edu <mailto:greve@nmr.mgh.harvard.edu>> wrote:
>
> I guess I'm not sure what you are trying to do. Can you elaborate?
>
> On 12/3/15 6:24 PM, Sabrina Yu wrote:
> > Hi Doug,
> >
> > Thanks for the quick reply. Is Xhemi only for measuring volumes for
> both hemispheres?
> >
> >
> https://www.mail-archive.com/freesurfer@nmr.mgh.harvard.edu/msg35097.html
> > You mentioned editing pctsurfcon to set white matter and gray matter
> in this email thread here. Can this be used to measure of white matter
> intensity for lh only, and then rh only? This email thread sounded
> promising for what I need, but am also unsure of how to input set wm
> and gm commands.
> >
> > Thanks,
> > Sabrina
> >
> > ________________________________________
> > From: freesurfer-bounces@nmr.mgh.harvard.edu
> <freesurfer-bounces@nmr.mgh.harvard.edu> on behalf of Douglas N Greve
> <greve@nmr.mgh.harvard.edu>
> > Sent: Thursday, December 3, 2015 2:31 PM
> > To: freesurfer@nmr.mgh.harvard.edu
> > Subject: Re: [Freesurfer] Left and right white matter intensity ratio
> >
> > see if this tool is what you need. It allows you to map to the homolgous
> > vertex on the contralateral hemisphere
> > http://surfer.nmr.mgh.harvard.edu/fswiki/Xhemi
> >
> > On 12/03/2015 05:25 PM, Sabrina Yu wrote:
> >> Hi there,
> >>
> >>
> >> Would it be possible to use pctsurfcon to calculate the ratio of white
> >> matter signal intensity between left and right hemispheres?
> >>
> >> Thank you
> >> Sabrina
> >>
> >>
> >> _______________________________________________
> >> Freesurfer mailing list
> >> Freesurfer@nmr.mgh.harvard.edu
> >> https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
> > --
> > Douglas N. Greve, Ph.D.
> > MGH-NMR Center
> > greve@nmr.mgh.harvard.edu
> > Phone Number: 617-724-2358
> > Fax: 617-726-7422
> >
> > Bugs: surfer.nmr.mgh.harvard.edu/fswiki/BugReporting
> > FileDrop: https://gate.nmr.mgh.harvard.edu/filedrop2
> > www.nmr.mgh.harvard.edu/facility/filedrop/index.html
> <http://www.nmr.mgh.harvard.edu/facility/filedrop/index.html>
> > Outgoing: ftp://surfer.nmr.mgh.harvard.edu/transfer/outgoing/flat/greve/
> >
> > _______________________________________________
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> >
> >
> > The information in this e-mail is intended only for the person to
> whom it is
> > addressed. If you believe this e-mail was sent to you in error and
> the e-mail
> > contains patient information, please contact the Partners Compliance
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> >
> >
>
> _______________________________________________
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>
>
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> https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer

--
Douglas N. Greve, Ph.D.
MGH-NMR Center
greve@nmr.mgh.harvard.edu
Phone Number: 617-724-2358
Fax: 617-726-7422

Bugs: surfer.nmr.mgh.harvard.edu/fswiki/BugReporting
FileDrop: https://gate.nmr.mgh.harvard.edu/filedrop2
www.nmr.mgh.harvard.edu/facility/filedrop/index.html
Outgoing: ftp://surfer.nmr.mgh.harvard.edu/transfer/outgoing/flat/greve/

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