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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 ddcc2442@gmail.com* 443-254-6298
Dear Daniel, I’ll defer to Jean Augustinack (CCed) on this one. Cheers, /Eugenio
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.commailto:ddcc2442@gmail.com 443-254-6298
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.commailto:ddcc2442@gmail.com 443-254-6298
freesurfer@nmr.mgh.harvard.edu
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Daniel Callow -
Iglesias Gonzalez, Juan E.