[Freesurfer] Using peak activation voxels to determine structural areas of interest

2009-07-28 Thread Nathan Dankner
Hello all. I am considering using peak activation voxels (with coordinates either in talairach or MNI space) gleaned from fmri studies in our lab to determine a priori areas of interest for examining group differences in cortical thickness. Is this something that is possible in freesurfer? In pa

Re: [Freesurfer] Using peak activation voxels to determine structural areas of interest

2009-07-28 Thread Douglas N Greve
I don't think we have anything that will grow a mask on the surface. A slightly hacky way to do it would be to create a binary mask on the surface in which your seed vertex is 1 and all others 0 (you can do this on the cmd line with mri_volsynth with the following options --pdf delta --delta-cr

[Freesurfer] Surface Analysis of the Anterior Cingulate

2009-07-28 Thread Stephen Tyree
One of the regions we are investigating using a surface-based analysis is the anterior cingulate. In some of our surface reconstructions, parts of this region are excluded from the ?h.cortex.label files. What are the criteria that Freesurfer uses to determine those boundaries? Could manual editi

Re: [Freesurfer] Surface Analysis of the Anterior Cingulate

2009-07-28 Thread rahul
Hi Stephen, For the ?h.aparc.annot atlas, the boundary definitions are included in the Desikan et al., 2006 paper (Neuroimage). Best, Rahul > One of the regions we are investigating using a surface-based analysis is > the anterior cingulate. In some of our surface reconstructions, parts of > t

Re: [Freesurfer] Surface Analysis of the Anterior Cingulate

2009-07-28 Thread Bruce Fischl
sure, you could edit it. You'll want to look at the volume as well. What version are you using? I think we improved this sometime in the past year (using the improved callosum labels) cheers Bruce On Tue, 28 Jul 2009 ra...@nmr.mgh.harvard.edu wrote: > Hi Stephen, > > For the ?h.aparc.annot a