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Hi Tibor, well if you angulate your slices the bvecs >may< change. Also the effective bvecs depend on the bmatrix. You can generate / simulate 'optimal' bvecs using camino: http://web4.cs.ucl.ac.uk/research/medic/camino/pmwiki/pmwiki.php?n=Main.Home Page Cheers, Andreas Von: "Auer, Tibor M.D. Ph.D." <[log in to unmask]> Antworten an: FSL - FMRIB's Software Library <[log in to unmask]> Datum: Wed, 19 Oct 2011 21:35:10 +0200 An: <[log in to unmask]> Betreff: Re: [FSL] Philips DTI gradient table Dear Jesper, Thank you for your fast reaction. Are not they scanner-independent? I just need the files required for dtifit. Auer, Tibor M.D. Ph.D. Biomedizinische NMR Forschungs GmbH am Max-Planck Institut für Biophysikalische Chemie Am Fassberg 11 37077 Göttingen Germany Phone/Work: +49-(0)551-201-1725 Phone/Home: +49-(0)551-387-0076 Mobile: +49-(0)176-8012-7921 Mail: [log in to unmask] From: FSL - FMRIB's Software Library [mailto:[log in to unmask]] On Behalf Of Jesper Andersson Sent: Wednesday, October 19, 2011 7:35 PM To: [log in to unmask] Subject: Re: [FSL] Philips DTI gradient table Dear Tibor, do you mean that you need any 32 and 16 optimal bvecs, or do you mean that you need to know specifically what bvecs your scanner uses for a certain sequence? Jesper On 19 Oct 2011, at 18:24, Auer, Tibor M.D. Ph.D. wrote: Dear All, I have started working on a Philips 3T Achieva system. We are planning to perform DTI with a so-called ³Jones²-sequence. I am not sure whether it is only a preset factory or a special sequence. The real question is that I need bvecs file for the analysis (bvals is obvious J). Could someone send me bvecs for 32 (high) and 16 (medium) directions? Thanks, Auer, Tibor M.D. Ph.D. Biomedizinische NMR Forschungs GmbH am Max-Planck Institut für Biophysikalische Chemie Am Fassberg 11 37077 Göttingen Germany Phone/Work: +49-(0)551-201-1725 Phone/Home: +49-(0)551-387-0076 Mobile: +49-(0)176-8012-7921 Mail: [log in to unmask]