Hi Bruce,

Thanks for your answer!  Yes. I would like to know the size of the cluster after painting on the surface.

Expecting Doug's reply!

Thanks in advance!

Karry

On Mon, Sep 3, 2012 at 7:51 PM, Bruce Fischl <fischl@nmr.mgh.harvard.edu> wrote:

you mean the size of the cluster on the surface? Yes, you can do that, but you'll need to wait for Doug's return for the details

cheers
Bruce

On Mon, 3 Sep 2012, keepmoon wrote:

Hi Bruce,
 
Thanks for your detailed explaination!
I have one more question about it!
Is it possible to get cluster size for being painted SPM results on freesure
surface (like getting the cluster size of cortical thickness in QDEC )? Is
there any command getting it?
 
Any idea will be appreciated!
Thanks!
Karry


 
On Mon, Sep 3, 2012 at 5:37 PM, Bruce Fischl <fischl@nmr.mgh.harvard.edu>
wrote:
      Hi Karry

      painting is done by mri_vol2surf and you can use it to specify
      how you want the sampling to be done. We typically sample the
      volume halfway our from the gray/white boundary, or sometimes a
      bit lower to avoid vascular artifacts at the pial surface. That
      said, it is quite flexible and you can use it to sample however
      you wish (e.g. average over the bottom third of cortex,
      etc....). When we sample we don't inspect the value, just grab
      it from the volume and assign it to the surface so if there are
      significant cluster that aren't intersected by the sampling band
      you specify they will not appear on the surface.

      cheers
      Bruce

      On Sun, 2 Sep 2012, keepmoon wrote:

            Hello everyone,
             
            I just read the information about "paintig SPM
            results onto Freesurfer"
            (http://surfer.nmr.mgh.harvard.edu/fswiki/SpmPainting). 
            It shows how to
            painting SPM results from statistic step (ex.
            spmT.img) to surface space. I
            tested the procedure and it worked. But I don't
            understand what is displayed
            on Freesurfer surface. Are all the significant
            differences from SPM
            statistic results are displayed on this surface? or
            some part of t values
            are displayed (which part)? As cortical thickness
            displayed on surface, each
            thickness value is painted on each vertex. But here
            t-value image from SPM
            is volume image, how to paint it on surface?
             
            Someone could give a little detailed explaination??
             
            Thanks in advance
             
            Karry
             
             




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