Hi Eustratios
the label file is a simple text format that contains the number of voxels in the first line or two. Since our voxels are 1mm isotropic that will also correspond to the volume. You could create a volume and use mri_segstats, but this would be much easier.
cheers Bruce
On Fri, 31 Aug 2012, Eustratios Karavasilis wrote:
Dear all, i am new Freesurfer user (Freesurfer 5.0 installed). I want to calculate the volume of a VOI that is not calculated from recon all. I ll decribe you the steps that were followed. Using tkmedit and tkmedit tools i created ROIs in many slices. Every ROI i saved it as label, then i merge all the labels using the mri_mergelabels. I am trying create a volume from this "final" label using mri_label2vol, using as label the new "final" label, as template volume the origin volume (orig.mgz) but i don't have the register.dat file. How i can create it? The above way is the appropriate way to calculate a VOI? Thank you in advance!