Hello,

I had a Talairach QA check failure, with the error log indicating a Z = -8 which
was below the criterion of z =-6.

I then used tkregister2 to attempt a manual alignment (no surf orig was
available).  After visual inspection, the subject and Talairach volumes looked
really closely aligned already.  I did some very conservative rotation and
movement in the sagital plane, checked other planes, hit "SAVE REG" and then
executed

recon-all -all -subjid MYFILENAMEHERE

in the subj directory.  I then get the same error, with the same z score.  I've
tried several alignments (very little adjustment each time) with the same
results.

I notice that when I hit SAVE REG there is a new 4 x 4 numerical matrix written
to my xterm screen.  The values look very very similar to those prior.

Is there a way to interpret these values to assist me in my manual alignment?
Should I just bag it and use -notal-check?  The majority of my patient set ran
without errors.

Thank you!


Deane Aikins, PhD
Director, Cognitive Neuroscience Laboratory
National Center for PTSD Clinical Neuroscience Division
Assistant Professor, Department of Psychiatry
Yale School of Medicine
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