Hello Freesurfers,
I am interested in comparing eTIV calculated with version 3.0.5 to that
calculated by version 4.0.5 (64 bit Cent OS).
In order to compare eTIV for a single brain estimated in version 3.0.5
to version 4.0.5, I copied a subject's previous freesurfer output
(v3.0.5) into the freesurfer version 4.0.5 folder, deleted all the
files within the "transforms" folder and carried out the following
procedures as outlined in the recon-all dev table:
1) Run the talairach procedure. Command = talairach_avi --i
mysubject --xfm talairach.auto.xfm
2) cp talairach.auto.xfm talairach.xfm
3) Run automatic failure detection. Command= talairach_afd -T 0.005 -xfm talairach.xfm
4) Create talairach_with_skull.lta. Command =
mri_em_register
-skull nu.mgz $freesurferhome/average/RB_all_withskull_2007-08-08.gca
talairach_with_skull.lta
5) Check the new eTIV. Command =
mri_label_volume -eTIV talairach_with_skull.lta aseg.mgz
17 53
As the aseg.mgz file exists from previous processing (versio
3.0.5), and the talairach_with_skull.lta was re-created with the new
processing (version 4.0.5), the output of this command should list the
eTIV based on the new talairach transform?
Are these procedures correct for generating new values of eTIV
if that is all i want?
Thanks!
--
Paul Greenberg, Ph.D.
Radiology Department, University of California, San Diego
VA San Diego Healthcare System (116A-13)
3350 La Jolla Village Drive
San Diego, CA 92161
Phone: (858) 552-8585 ext. 2903
Fax: (858) 642-3836
pgreenberg@ucsd.edu