Hi Jamie,

It’s a message from mri_robust_register in the initialization of the atlas position. If the finaloutput looks reasonable (which it mostly likely will), don’t worry too much.

Cheers,

/Eugenio

Juan Eugenio Iglesias

ERC Senior Research Fellow

Centre for Medical Image Computing (CMIC)

University College London

http://www.jeiglesias.com

http://cmictig.cs.ucl.ac.uk/

From: <freesurfer-bounces@nmr.mgh.harvard.edu> on behalf of Jamie Hanson <jamielarshanson@gmail.com>
Reply-To: Freesurfer support list <freesurfer@nmr.mgh.harvard.edu>
Date: Friday, 10 August 2018 at 17:13
To: "freesurfer@nmr.mgh.harvard.edu" <freesurfer@nmr.mgh.harvard.edu>
Subject: [Freesurfer] Hippocampal subfield registration question.

External Email - Use Caution

Dear FS List,

I was just started to run hippocampal subfield segmentation and had a question about registration (and a related output warning).
In the ~5 test subjects I've tried the SF routine, I get a warning early on that says--

**********************************************************
*
* WARNING: Registration did not converge in 5 steps!
* Problem might be ill posed.
* Please inspect output manually!
*
**********************************************************

Two questions--
1) Is that anything to be concerned about?
2) If so, are there relevant documents regarding checking the outputs to flag potential poor registration/segmentation?

Any information or thoughts are greatly appreciated!
Thanks much!

All the best,
Jamie.

--
Jamie Hanson
Assistant Professor, Psychology
Research Scientist, Learning Research and Development Center
University of Pittsburgh
Personal website: jamiehanson.org