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Hi everyone!

I have segmented the hippocampus subfields using the segmentation tool provided by the latest version of FreeSurfer. I am now looking at the pictures and I have a few questions:

In some cases, the hp tail takes a bit of the thalamus, does the size of the tail or its borders affect the subfields. This to know if we should exclude the participant or if we can just exclude the tail from t he analysis
How the algorithm works?

I also have provided a picture as an example.

Thank you for the help.