Forwarding Jean’s response:

Hi Daniel,

We used specific anatomical landmarks, visually inspecting the hippocampal 

head and body in an anterior-posterior direction. Once the uncus (the 

medial most region in the hippocampus) ends posteriorly, it is considered 

hippocampal body. The hippocampal body is much smaller than the head and 

is easy to see.

Jean

Juan Eugenio Iglesias

Senior research fellow

CMIC (UCL), MGH (HMS) and CSAIL (MIT)

http://www.jeiglesias.com 

From: <freesurfer-bounces@nmr.mgh.harvard.edu> on behalf of Daniel Callow <ddcc2442@gmail.com>
Reply-To: Freesurfer support list <freesurfer@nmr.mgh.harvard.edu>
Date: Thursday, 14 November 2019 at 19:02
To: Freesurfer support list <freesurfer@nmr.mgh.harvard.edu>
Subject: [Freesurfer] HBT hippocampal segmentation

        External Email - Use Caution        

Hello,

I was just asked by a reviewer how the head body and tail of the Freesurfer subfield segmentation is determined. I know that there is no differentiation of the tail, however, there are differentiations between the head and body of the different subfields. Are there specific anatomical boundary rules that drive the algorithm to differentiate between head and body in the HBT segmentation output.

Thank you for any guidance you can provide!

Best,

Daniel Callow

Graduate Student, Neuroscience and Cognitive Science

Exercise for Brain Health Lab

University of Maryland, College Park

ddcc2442@gmail.com

443-254-6298