Hi Ruth - Glad to hear this is useful to you. The rotation and translation parameters are extracted from the affine registration of each DWI volume to the first volume, which in trac-all is performed by eddy_correct.

a.y

On Tue, 10 Dec 2013, Ruth Carper wrote:

Hi Anastasia, We discussed your paper at our lab meeting yesterday so this was perfect timing on the release of motion measures in  your updated TRACULA.  But I wasn't clear where the numbers are coming from in your new update.  Is this from EDDY? eddy_correct?  Some other registration step?   Thanks, Ruth