Hi Liang
yes, that information is encoded in the .tif file that is the target of
the registration. You can use mrisp_paint to copy a frame out of
$FREESURFER_HOME/average/?h.average.curvature.filled.buckner40.tif
the tif file is 3 sets of triplets in different frames. The first is the
mean of the measure, the second is the variance and the third is the
degrees of freedom. The 3 triplets are for the curvature of the
inflated surface, the sulc and mean curvature of the white surface.
cheers
Bruce
On Thu, 13 Sep 2012, liang
wang wrote:
Dear FS folkers,
I am working on a functional probabilistic atlas. I find that some functional
regions (particular along a big sulcus) show quite high probability value over a
large sample, whereas the probability for some regions are quite lower. I think
this disparity could be accounted for by the anatomical variation on each
surface
node that appears while surface-based registering individual surface to the
average
template that was provided by Freesurfer. For instance, the anatomical variation
could be pretty small within a big sulcus (like central sulcus).
I assume that Freesurfer output a file which characterizes this type of
anatomical
variation. Could someone point me which file it is and how to use it to create a
group-level measure in order to clear display somewhere has large variation.
Thanks.
Best,
Liang
--
Liang Wang, PhD
Neuroscience of Attention and Perception Laboratory
Princeton Neuroscience Institute
Princeton University
Princeton, NJ, 08540
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