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Hi, you can try Martin Reuter's mri_robust_template (part of FreeSurfer). Cheers, Andreas Am 15.01.13 21:50 schrieb "Brett Harton" unter <[log in to unmask]>: >Hello, > >I have a subject who I collected DTI data on at six time points. This >question was brought up in an earlier post, but did not appear to get >answered. Is there a way to perform a halfway transform for more than >two time points so that all FA maps can be registered in the same space? >Normalization to a template is not an option for this patient. I've >tried using Baseline as the Reference image, week 1 as the input image, >and the other weeks as secondary images and applying the halfway >transform to all of the weeks but this does not seem to do the trick. >I've also tried registering each of the consecutive weeks to the baseline >image and used each week's halfway forward transform, but that doesn't >seem to work either. Any suggestions/solutions would be greatly >appreciated. > >Brett