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.eduwrote:
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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