In your first post, you said that you were confused as to why the thickness and volume were changing but the surface was not changing. Then you said that the pial surface changed. Does that answer your first question?

On 11/9/2021 1:33 PM, Castro Leal, Gonzalo wrote:

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The time of the aparc.stats is 1h and 20min after the modification of the file pial.T2, and in the case of the T1 only processing the time stamp on the apar.stats is 20 min after the modification of the pial.T1. Does this answer your question or should I look into something else?

De: freesurfer-bounces@nmr.mgh.harvard.edu <freesurfer-bounces@nmr.mgh.harvard.edu> en nombre de Douglas N. Greve <dgreve@mgh.harvard.edu>
Enviado: martes, 9 de noviembre de 2021 18:09
Para: freesurfer@nmr.mgh.harvard.edu <freesurfer@nmr.mgh.harvard.edu>
Asunto: Re: [Freesurfer] T1 aparc.stats vs T1 with T2 aparc.stats
Were the stats files regenerated? Check the modification date

On 11/9/2021 10:41 AM, Castro Leal, Gonzalo wrote:
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Yes the pial surface changed and the white did not.

De: freesurfer-bounces@nmr.mgh.harvard.edu <freesurfer-bounces@nmr.mgh.harvard.edu> en nombre de Douglas N. Greve <dgreve@MGH.HARVARD.EDU>
Enviado: martes, 9 de noviembre de 2021 14:49
Para: freesurfer@nmr.mgh.harvard.edu <freesurfer@nmr.mgh.harvard.edu>
Asunto: Re: [Freesurfer] T1 aparc.stats vs T1 with T2 aparc.stats
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The white surface won't change, but the pial surface should change. Can you verify that the pial surface changed?

On 11/9/2021 9:36 AM, Castro Leal, Gonzalo wrote:
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Hello,

I wanted to compare the results of the aparc.stats on the same subjects when only the T1 is used and when T2 is used for pial refinement along with the same T1. To my surprise the tickness increased (on average across regions), the gm volume decreased and the surface didnt change. My questions is how is that the thickness increased and the volume decresed if the surface did not change?

(I used freesrufer 7.1.1)

Many thanks,

Gonzalo.
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