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Dear Freesurfer experts.
I have some questions about calculated volumes by freesurfer.
1. Are the volumes in aseg, .aparc, .aparc.2005s absolute volumes measured in naive space or volumes measured after spatial normalization. 2. How much accurate the volumes (hippocampus, amygdala, thalamus, insula, precentral, etc) in aseg, .aparc, .aparc.2005s. And they are verified? 3. Are the volumes in lh(or rh).aparc gray matter volumes? 4. What is meaning G_*, and S_* in lh(or rh).aparc.a2005s? 5. How can I separately see the strucures of .aparc, .aparc.2005s in pial surface rendering?
Woo Suk, Tae Ph.D Seoul, Korea