Hi all,
I ran mri_surf2surf and then mris_convert to get vertexwise thickness and surface area values in ascii files. I found that some vertices had negative values of surface area for few subjects. Should not surface area values be positive only?

-Sabin
On Thursday, April 17, 2014 10:30 AM, sabin khadka <sabinkhdk@yahoo.com> wrote:
Ahh. Great. Thanks you very much for the information.
I ran mri_surf2surf and then mris_convert to get thickness and surface area vertex wise values. I found that some vertices had negative values of surface area for few subjects. Should not surface area values be positive only?

-Sabin
On Thursday, April 17, 2014 10:10 AM, Bruce Fischl <fischl@nmr.mgh.harvard.edu> wrote:
yes, you can use mri_surf2surf first to map them to fsaverage, then
convert them to ascii

On Thu, 17 Apr 2014, sabin khadka wrote:

> Hi Bruce,
> Thanks for the reply. I was wondering if I have to somehow resample or map
> to fsaverage so as to have same # of vertices across all subjects. I tried
> using mris_convert as you suggested above but I can see that different
> subjects have different #of vertices.
>
> Thanks for help.
>
> -Sabin
> On Thursday, April 17, 2014 9:29 AM, Bruce Fischl
> <fischl@nmr.mgh.harvard.edu> wrote:
> Hi Sabin
>
> mris_convert can convert binary "curvature" format files to ascii ones if
> the output file has the extension asc. Something like:
>
> mris_convert -c lh.thickness lh.orig lh.thickness.asc
>
> this will give you a 5 column ascii file in the format
> <vertex index> <x> <y> <z> <thickness>
>
> cheers
> Bruce
>
> On Thu, 17 Apr 2014,
> sabin khadka
> wrote:
>
> > Hi all,
> > I want to extract to extract thickness, area and lgi values vertex wise in
> > ascii files for group of subjects. Could anyone suggest me on how to do
> it.
> >
> > Thank you for your help.
> >
> > -Sabin
>
> >
> >
>
>
> 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
> HelpLine at
> http://www.partners.org/complianceline . If the e-mail was sent to you in
> error
> but does not contain patient information, please contact the sender and
> properly
> dispose of the e-mail.
>
>
>
>
>