You should probably be suspicious.

From: Katherine Damme <katherine.damme@gmail.commailto:katherine.damme@gmail.com> Date: Wednesday, September 5, 2018 at 1:48 PM To: Freesurfer support list <freesurfer@nmr.mgh.harvard.edumailto:freesurfer@nmr.mgh.harvard.edu>, Anastasia Yendiki <ayendiki@nmr.mgh.harvard.edumailto:ayendiki@nmr.mgh.harvard.edu> Subject: Mean FA values for major tracts all greater than 1

External Email - Use Caution

Hello Freesurfer Support group,

I have run tracula on hundreds of subjects for a study and their primary tracts are all showing that MFA is greater than 1. Typically, I expected that MFA should be in the .3 to 1 range. Should I be suspicious that these MFA values are over the top of that range or is this common for major tracts like the forceps major?

Thank you for your insights on this potential error.

Kate