The aseg.stats file takes into account partial voluming which is not taken into account when you simply sum up the subcortical structures because some of those structures will be partially volumed with white matter.

doug

Eisenstein, Sarah wrote:

Hello,

What goes into the calculation of subcortical volume? We have tried adding volumes of individual subcortical areas but the total does not equal the subcortical volume provided by aseg. Is the subcortical volume calculation accurate?

Thanks,

Sarah Eisenstein

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