Hi Doug - Yes, there used to be a bug in how freeview used to interpret orientation info from the header of volumes loaded with the -dti option. Hopefully it's fixed now!

a.y

From: freesurfer-bounces@nmr.mgh.harvard.edu [freesurfer-bounces@nmr.mgh.harvard.edu] on behalf of Douglas Merkitch [Douglas_Merkitch@rush.edu]
Sent: Wednesday, November 23, 2016 12:37 PM
To: Freesurfer support list
Subject: [Freesurfer] Freeview -dti Display as Vectors Discrepancy

Hello experts,

I have come across what I think could be an inconsistency with how freeview interprets and/or displays dti data as vectors. Specifically, the x component seems to be inverted in freeview from freesurfer-Darwin-lion-stable-pub-v5.3.0 as compared to fslview (version 509) AND freeview from freesurfer-Darwin-OSX-stable-v6-beta-20161116-5037eae.

Is this a known issue with a patch available? Any insight would be greatly appreciated.

Thanks,

Doug

Douglas Merkitch

Neurological Sciences

Rush University Medical Center
Phone: (312) 563-3853
Fax: (312) 563-4660
Email: Douglas_Merkitch@rush.edu