HI Mic,

Terribly sorry for not seeing this earlier.

You can use infantFS for the 2-4.5 year age range. I would only start using the adult version over that age limit and for several years I would still carefully look at the outputs. We wrote up an editing guideline for the 4-6 year age range that you mind find handy:

https://surfer.nmr.mgh.harvard.edu/fswiki/ChildBrainManualEdits?highlight=%2...

Best, Lilla ________________________________ From: freesurfer-bounces@nmr.mgh.harvard.edu freesurfer-bounces@nmr.mgh.harvard.edu on behalf of Michelangelo Fabbrizzi michefabb@gmail.com Sent: Wednesday, October 11, 2023 11:48 AM To: freesurfer@nmr.mgh.harvard.edu freesurfer@nmr.mgh.harvard.edu Cc: Sennott, Liam Ricker LSENNOTT@mgh.harvard.edu Subject: [Freesurfer] Use of infantFS and FS in the interval 2 - 4.5 years of age

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Dear FS experts,

I see it is recommended to use infantFS below 2 years of age, whereas FS has been used for 4.5 years and above. I was wondering what could be used in the interval 2 - 4.5 years of age: which are benefits and drawbacks of both?

Thanks, appreciated,

Mic