Hi, good. How many degrees was the angulation of the axial plane? This is important to know in order to see if Siemens did rotate the header entries for the bvecs. I suggest you run a test on a strongly angulated phantom and keep us posted. Cheers- Andreas ________________________________________ Von: FSL - FMRIB's Software Library [[log in to unmask]] im Auftrag von Martin Reiss-Zimmermann [[log in to unmask]] Gesendet: Sonntag, 11. April 2010 07:08 An: [log in to unmask] Betreff: Re: [FSL] AW: [FSL] which bvecs to trust? Hello Martin, here are the bvec and bval files computed by MRIconvert and dcm2nii on a MAC and a PC. I also added the Siemens table. greetings, Martin