Hi Bruce,

I'll see if I can phrase this right

In aseg.mgz each region has essentially been given a unique number (e.g. 17 for left hippocampus, for example). ROI taken from aseg.mgz volumes are non-probabilistic, yes-no affairs already.  MRI_binarize just pulls this out when we want to look at particular regions, say left hipp???

Josh




On Wed, Nov 30, 2011 at 1:39 PM, Bruce Fischl <fischl@nmr.mgh.harvard.edu> wrote:
probably not, as the aseg.stats calculation uses partial volume estimates.

cheers
Bruce

On Wed, 30 Nov 2011, Joshua Lee wrote:

Hey Doug, THanks. That looks simpler. I'll probably use that.

Question: Will the total volume of a ROI taken from aseg.mgz correspond to
the volume given in aseg.stats?

Josh



On Wed, Nov 30, 2011 at 9:55 AM, Douglas N Greve <greve@nmr.mgh.harvard.edu>
wrote:
     If you have matlab, you can load the aseg into matlab, like
     aseg = MRIread('aseg.mgz');
     vol = length(aseg.vol(:,:,n:256) == ID);
     where ID is the code number for the ROI you want  as found in
     $FREESURFER_HOME/FreeSurferColorLUT.txt
     doug

     Joshua Lee wrote:
Hi All,

I would like to determine the volumes of a segmented region
below or above an arbitrary line in one of the planes. For
example, what would be the remaining volume of a label when z >=
nth slice, where I would have previously determined the
appropriate value of n.



Thanks,
Josh
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