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Hi there - this sounds like a problem that came up once before: http://www.jiscmail.ac.uk/cgi-bin/webadmin?A2=ind0410&L=fsl&D=0&I=-1&P=10422 In this case there were two problems. 1) The bvecs and bvals files were made in microsoft tools, so they had spurious microsoft carriage returns (^M) in them. 2) There was no carriage return at the end of bvals If neither of these is the problem, then I'd be happy to take a quick look at the data, if you tar it up and put it on the web. Thanks T ------------------------------------------------------------------------------- Tim Behrens Centre for Functional MRI of the Brain The John Radcliffe Hospital Headley Way Oxford OX3 9DU Oxford University Work 01865 222782 Mobile 07980 884537 ------------------------------------------------------------------------------- On Thu, 25 Nov 2004, Susan Kouloyan-Ilic wrote: > Hi, > I'm relatively new to FSL. I'm having trouble with both DTIfit and > Bedpost. Firstly, when I run DTIfit, I get no pictures, apart from the > SO. It is just black, and comes up with a 0 to 0 brightness range, with > no effect if I alter the numbers to 0 to 1. The S0 comes up as an > anatomical looking picture. The same thing happens regardless of the > numbers I use in bvecs/bvals, as long as there are in the correct format. > > When I run bedpost, I end up with a mostly blue brain (range 0 to 1), with > scattered coloured pixels, but not what I would expect! Bedpost_datacheck > goes through without problems, and bvecs is normalised. This is > regardless of whether I eddycorrect or not. > > Any suggestions? I'm stumped. > Thanks, > Susan >