I need ROIs of Inferior Colliculus and Brainstem-cochlear-nucleus. Can freesurfer distinguish it from other brainstem structures in segmentation?

I have found these references in the LUT "7100  Brainstem-inferior-colliculus  and 7101  Brainstem-cochlear-nucleus", but idid not find them in the aseg or aparac files. 

How to measure the volume and thickness of these regions? 

Thank you in advance

Chama