Hi Roberto

all stats should correctly account for the interpolation to 1mm isotropic, so I don't think that's the answer. Did you check the talairach.xfm? It is the basis of the estimated ICV. If it's wrong, so will the ICV be.

cheers Bruce

On Thu, 19 May 2011, Sghedoni Roberto wrote:

Hi, I'm looking at a aparc.stats file. I noticed that VoxelVolume is 1 mm^3. However for this patient the voxel size was 0.9 x 0.9 x 1 mm^3 in acquisition. Actually, in the aparc.stats file Nvoxel = Volume_mm3 for each structure. I would like to understand whether the voxel size was resized from the acquisition value to 1 mm^3 and the result is ok or the voxel size reported in aparc.stats is uncorrect and I have to rescale the values for the correct voxel size. Actually the results are quite strange, in particular the intracranial volume is quite large and if I rescale for the above value the result is more similar to our past patients.

Thanks

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