Hi,
I've noticed that the BRAIN volume output from sienax changes
drastically if you use a 2 class vs a 3 class segmentation.
ie.
2 class BRAIN vol=734222.81
3 class BRAIN vol=1116239.05
I know in the 3 class scheme the volume is the sum of the PVE for the
GM+WM, and for the 2 class segmentation it is just the sum of the PVE
parenchyma class (pve_1).
My questions are
1) why is there such a large discrepancy?
2) if I am looking for total BRAIN volume, which do you recommend using?
thanks,
mishkin
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