Hi dear all, I have a set of DTI data as 30 direction and average=2, so I have two b=0 in my bvals file (volume=0 and volume=32). To make nodif file If I rename my 4D data file to nodif.nii.gz, is it enough? or I should use from this command: $ fslroi data.nii.gz nodif.nii.gz 0 1 ?? Is A nodif file enough for my data? Thanks in advance, Neda