FreeSurfer does not need ACPC alignment to be done. It does benefit from on-scanner B1- correction such as “Pre-Scan Normalize” on Siemens scanners.

Matt.

From: <freesurfer-bounces@nmr.mgh.harvard.edu> on behalf of Toshiharu Kamishikiryo <k5105880@gmail.com>
Reply-To: Freesurfer support list <freesurfer@nmr.mgh.harvard.edu>
Date: Sunday, April 23, 2023 at 4:46 PM
To: "freesurfer@nmr.mgh.harvard.edu" <freesurfer@nmr.mgh.harvard.edu>
Subject: [Freesurfer] ACPC alignment and RF/B1 bias correction before processing

External Email - Use Caution

Hello Freesurfer experts

Would it be more accurate to apply ACPC alignment and RF/B1 bias correction to T1w.nii.gz before recon-all to improve pial estimation accuracy?

Thanks in advance

Regards
Kamishikiryo
Research Student

The materials in this message are private and may contain Protected Healthcare Information or other information of a sensitive nature. If you are not the intended recipient, be advised that any unauthorized use, disclosure, copying or the taking of any action in reliance on the contents of this information is strictly prohibited. If you have received this email in error, please immediately notify the sender via telephone or return mail.