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Hi Jesper, Could you email me the app for calculating directions as well? Thanks a lot! Qiuting On Fri, Aug 30, 2013 at 6:35 AM, Jesper Andersson < [log in to unmask]> wrote: > Hi again, > > > > > Imagined you would checked it for high-bvalues. Are there any lower > > SNR-levels to be above though? > > Well, with a b of 10000 there isn't much signal left, and that seems to > work. Eddy uses all the info in all the voxels to estimate a few handfuls > of parameters, unlike for example bedpost that try to do it on a > voxel-by-voxel basis. Therefore I reckon any data that has a good enough > SNR to be useful, eddy will deal with. > > > > > Is there anything one should think of when generating a gradient > > scheme to make a good sampling? The half-sphere scheme on your website > > (http://fsl.fmrib.ox.ac.uk/fsl/fslwiki/EDDY) looks very uniform. > > The more uniformly you can sample, the better. Note that we do NOT > recommend the half sphere scheme though. If you are on Mac I can send you a > little app for calculating directions? > > > > > I will pilot the twice-refocusing to see, but it would be tempting to > > shorten the TE as we have strong gradients and would be able to get in > > the weighting without needed to separate diffusion gradients too much. > > That was the thinking in the HCP. > > Is that really your address? Will we be seeing cheap flatpack MR scanners > from IKEA soon? :-) > > > _______________________________ > > Finn Lennartsson > > Yxnäs 24 > > SE-34393 Älmhult, Sweden > > Cell: + 46 704 838907 > > E-mail: [log in to unmask] >