Hi Joe I suspect that the data you have extracted are not consistent. Have you added b=0 images? Do these correspond to the right entries in the bvals file? I bet your dti_S0 will not look like a b=0, which would indicate that the sequence in your data file and the corresponding bvals do not correctly match.
Cheers Stam On 11 Nov 2014, at 18:45, Joseph Orr <[email protected]<mailto:[email protected]>> wrote: Per suggestions posted a few weeks back I am running drift only on the b=1000 shell. I used fslsplit to extract the volumes from data, then merged the files with b=1000. I also extracted the bvals and bvecs for the corresponding volumes. Running drift, my resulting FA map is very speckled (see attached), though the corpus callosum is somewhat visible. This is the case with or without using grad_dev. Is this expected or am I doing something wrong? Thanks, Joe — Joseph M. Orr, Ph.D. Post-Doctoral Fellow Institute of Cognitive Science University of Colorado Boulder _______________________________________________ HCP-Users mailing list [email protected]<mailto:[email protected]> http://lists.humanconnectome.org/mailman/listinfo/hcp-users <dti_FA.nii.gz> _______________________________________________ HCP-Users mailing list [email protected] http://lists.humanconnectome.org/mailman/listinfo/hcp-users
