Hi Lauren - The transforms are all under dmri/xfms/... and the one you're looking for is the output of bbregister, which is called anatorig2diff.bbr.dat or .mat.

Best, a.y

________________________________ From: freesurfer-bounces@nmr.mgh.harvard.edu [freesurfer-bounces@nmr.mgh.harvard.edu] on behalf of Ostrowski, Lauren [LOSTROWSKI@mgh.harvard.edu] Sent: Wednesday, October 05, 2016 10:08 AM To: Freesurfer@nmr.mgh.harvard.edu Subject: [Freesurfer] [FreeSurfer] TRACULA Registration transform matrix

Hi experts,

We're trying to convert an ROI in T1 MRI space to diffusion space in order to collect FA values from the ROI (using TRACULA output files). Is there a t1 to dwi transform matrix to use with TRACULA?

Thanks, Lauren