Hi Tracy
I guess so. We haven't quantified it at all.
cheers Bruce On Thu, 13 Sep 2012, Tracy A. Butler wrote:
Hi. Thanks for the response below. Does the fact that choroid plexus varies so much in intensity mean that Freesurfer does not always accurately measure CP volume? Do you think we should do some manual tracing to confirm Freesurfer results?
Thanks, Tracy
From: Bruce Fischl fischl@nmr.mgh.harvard.edu Date: Wed, Sep 12, 2012 at 7:14 PM Subject: Re: [Freesurfer] Choroid Plexus in ventricles To: Hugh Wang wangxiuyuan85@gmail.com Cc: freesurfer@nmr.mgh.harvard.edu
Hi Hugh
it depends on the dataset. It's a bit mysterious to me why sometimes the choroid is so bright and other times not. I've definitely seen it in the inf lat ventricles. We included choroid to avoid confusing it with hippocampus so I doubt we labeled any in the 3rd or 4th ventricles.
cheers Bruce
On Wed, 12 Sep 2012, Hugh Wang wrote:
Dear Freesurfer Users, When masking out the ventricles and choroid plexus from aparg+aseg, I found there were choroid plexus volumes in lateral ventricles, but nothing in inferior lateral ventricles or 3rd/4th ventricle. Did I miss those tiny volumes or the Freesurfer didn't segment choroid plexus into that detail? Thanks!
Best, Hugh
P.S. I used Freesurfer 5.1 on a 64bit CentOS platform
Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer