Dwifslpreproc without posterior to anterior (PA) direction DWI data

Hi everyone,
I am new to DWI data analysis, I only have anterior to posterior (AP) direction nii data, no PA data and field_mapping data. So I wonder if there are any problems with the data analysis after dwifslpreproc
below is my script

*mrconvert sub-CON02_ses-preop_acq-AP_dwi.nii.gz sub-02_dwi.mif *

  • -fslgrad sub-CON02_ses-preop_acq-AP_dwi.bvec sub-CON02_ses-preop_acq-AP_dwi.bval*

dwidenoise sub-02_dwi.mif sub-02_den.mif -noise noise.mif
#calculate residual
mrcalc sub-02_dwi.mif sub-02_den.mif -subtract residual.mif
dwifslpreproc sub-02_den.mif sub-02_den_preproc.mif -pe_dir j -rpe_none -nocleanup

1 Like


Your code looks right. However, you may be interested to check this method which will allow you to do distortion correction without field map or reverse phase encoded data.

Best regards,


Thanks so much. I wll try it.