Dear MRTrix3 Community,
I tried to convert dwi data (in nifti format with FSL-like bval/bvec file) to .mif format and tried to run dwi2fod. The code worked, but left a following warning.
[WARNING] The following image volumes were not successfully assigned to a b-value shell: dwi2fod: [WARNING] 55 (462782.31946368003)
Then I check gradient vector in DWI.mif by a following command:
mrinfo -dwgrad DWI.mif
Then it turns out that b-value in one of gradient direction becomes erroneous number (b = 462782 4800 s/mm2.), even while all other gradient directions are correctly assigned with b = 4800 s/mm2.
Since original text file on bval only includes b = 0 or 4800 s/mm2, I don’t understand why b-value became an abnormal number only in one direction.
As a results of this incorrect b-value, I got abnormal number of FA value in the data.
Any thoughts will be greatly appreciated!