Nick,
Just a clarification question. I read the wiki regarding the new eTIV and it says that the registration to $FREESURFER_HOME/average/711-2C_as_mni_average_305.4dfp.img is done with talairach_avi as opposed to imgreg_4dfp. I am guessing imgreg_4dfp is correct because the template has 4dfp right in its name. Also, I have not used imgreg_4dfp before, and looking at its options I was curious what a t4file and mode were; two of its listed options. Does this command generate a .xfm file? Thanks.
Chris
Chris,
talairach_avi is a wrapper script around the registration tools created by Avi Snyder of Washington University, namely the tool imgreg_4dfp, which is the heart of talairach_avi. The wrapper script handles all the conversions (4dfp,t4 to mgz, concluding with the output of the talairach.xfm file). talairach_avi is a text readable file if you are curious as to what it is doing, and examples of usage of imgreg_4dfp. I do not know the different mode options to those t4 utilities, other than they are for specifying the characteristics of the images being registered.
Nick
On Fri, 2009-02-13 at 12:17 -0600, bell0368@umn.edu wrote:
Nick,
Just a clarification question. I read the wiki regarding the new eTIV and it says that the registration to $FREESURFER_HOME/average/711-2C_as_mni_average_305.4dfp.img is done with talairach_avi as opposed to imgreg_4dfp. I am guessing imgreg_4dfp is correct because the template has 4dfp right in its name. Also, I have not used imgreg_4dfp before, and looking at its options I was curious what a t4file and mode were; two of its listed options. Does this command generate a .xfm file? Thanks.
Chris
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Nick Schmansky