Dear Freesurfers,
I have noticed a slight incongruity between the coordinates outputted by
sig.cluster.summary and those in tksurfer.
For instance, in the .summary file one of my maxima (VtxMax=92221) has the
following "Tal" coordinates: -14.9, -62.2, 57.5.
Now, if I open the fsaverage with tksurfer, and I enter 92221 as my Vertex
Index, the Vertex Talairach coordinates are slightly different than those
reported by the .summary file (-14.89, -61.61, 57.01). Is this because the
Max in my significant cluster actually spans multiple adjacent vertices, and
therefore the coordinates provided by the .summary file represent an average
across those vertices?
As for the "MNI Talairach", my understanding is that these are from the
MNI305, right? If so, why the "Talairach" part of the name?
Thanks,
Marco
_____________________
Marco L. Loggia, PhD
Postdoctoral Fellow, Mass General Hospital & Brigham and Women's Hospital
Harvard Medical School
CNY Building 120, suite 101E
Charlestown, Massachusetts 02129
Phone: (617) 643-7267
Fax: (617) 643-7340 marco(a)nmr.mgh.harvard.edu