no, it's best to visually determine it since things change over space
(for both biological and technical reasons)
On Fri, 19 May 2017, Caroline
Beelen wrote:
Dear Bruce,
Thank you for answering my question. However, I'm still in a bit confused...
Therefore, I have one more question:
Would
An HTML attachment was scrubbed...
URL:
http://mail.nmr.mgh.harvard.edu/pipermail/freesurfer/attachments/20170518/99e0e0d5/attachment-0001.html
--
Message: 4
Date: Thu, 18 May 2017 10:33:07 -0400
From: Douglas N Greve
Subject: Re: [Freesurfer] Mean gray-white contrast for each RO
1. No, we usually do wm edits/control points first as this can fix the
pial problems.
2. You can put control points in any voxel that is clearly WM with no other
tissue class partial-volumed into it. The intensity threshold depends on
the MR sequence, where you are in the brain and possibl