Dear FreeSurfers,

I received FreeSurfer structural MRI brain data to analyze, but there are some questions about specific FreeSurfer variables that I could not find answered on your wiki or in the mail archive:

1.- "Non-White Matter hypointensities": 1.a - Are these the same thing as "gray matter hyperintensities"? 1.b - Are these scanned from the whole brain gray matter or only sub-cortical? 1.c - Are these also considered traumatic markers? (literature would be appreciated)

2.- 5th Ventricle: is this variable encompassing the Cavum Septum Pellucidum only, or does it also include the Cavum Vergae?

3.- Are there published analysis about FreeSurfer accuracy for CSF volumes?

Thanks and will look forward,

Ney

__________________________ Ney Alliey-Rodriguez, M.D. Research Assistant Professor - Gershon Lab Department of Psychiatry and Behavioral Neuroscience University of Chicago 5841 S Maryland Ave Room M344 (MC3077) Chicago, IL 60637 Phone: 1(773)702-0599