Center for Magnetic Resonance Research FSL License Yes University of Minnesota NITRC DW-MRI registration in FSL Yes Christophe Lenglet This code registers linearly and non-linearly Diffusion Weighted Magnetic Resonance Images (DW-MRIs) by extending FLIRT (linear registration of 3D scalar volumes) and FNIRT (non-linear registration of 3D scalar volumes) in the FMRIB Software Library (FSL) to work with 4D volumes. The basis for registering DW-MRIs is the concept of Angular Interpolation (Tao, X., Miller, J. V., 2006. A method forregistering diffusion weighted magnetic resonance images. In: MICCAI. Vol. 9. pp. 594–602), which is implemented and extended to non-linear registration, based on the FLIRT and FNIRT models in FSL. The paper corresponding to this DW-MRIs tool can be found in https://www.frontiersin.org/articles/10.3389/fnins.2013.00041/full The code does not overwrite FLIRT, FNIRT or any of the FSL C++ code. It is added as FLIRT4D, FNIRT4D and supporting cost functions. The makefiles will however be overwritten to compile the new code, without affecting any version of FSL. 2013-3-08 March 08 2013 2012-3-02 DWIregistration DW-MRI registration in FSL FSL License, MR, Amyotrophic Lateral Sclerosis http://www.nitrc.org/projects/dwiregistration/ clenglet@umn.edu