I just wanted to alert you to a new tool in FreeSurfer to perform subcortical limbic segmentation. The documentation and download are here https://surfer.nmr.mgh.harvard.edu/fswiki/ScLimbic The paper is here https://pubmed.ncbi.nlm.nih.gov/34571161/

It segments septal nuclei,basal forebrain, fornix, nucleus accumbens, hypothalamus (divided into mamillary bodies and the rest of hypothalamus); see attached pic.

You might also be interested in a related tool from Benjamin Billot for segmenting the hypothalamus into subunits. You can find docs here https://surfer.nmr.mgh.harvard.edu/fswiki/HypothalamicSubunits

doug