Hello,
I have several questions regarding the aal cluster labeling (I am using spm8 for FDG-PET):
1) I recognized that for one cluster, when you sum up the shares of all labels (% Cluster) of whom a certain Cluster extends it does not come out as (near to) 100% as you would expect. The sum is often far less than 100% but why?
2) Always when I multiply the % Cluster of the OUTSIDE label of any Cluster in any brain analysis with the number of voxel of this cluster it amounts to 1. This would mean that there is always just one voxel labeled OUTSIDE, what makes no sense at all in my opinion.
3) Lastly I found in analysis of several brains that sometimes in a cluster the % label is given a number over 100 which I interpret that over 100% of this label are filled out by this cluster, how is this be possible?
Kind regards,
Martin
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