from qsiprep.workflows.dwi.fsl import init_fsl_hmc_wf

wf = init_fsl_hmc_wf(
    {
        'dwi_series': [
            '.../phasediff/sub-1/dwi/sub-1_dir-AP_run-1_dwi.nii.gz',
            '.../phasediff/sub-1/dwi/sub-1_dir-AP_run-2_dwi.nii.gz',
        ],
        'fieldmap_info': {
            'phasediff': '.../phasediff/sub-1/fmap/sub-1_phasediff.nii.gz',
            'magnitude1': '.../magnitude1/sub-1/fmap/sub-1_magnitude1.nii.gz',
            'suffix': 'phasediff',
        },
        'dwi_series_pedir': 'j',
        'concatenated_bids_name': 'sub-1_dir-AP',
    },
    b0_threshold=100,
    impute_slice_threshold=0.,
    fmap_demean=False,
    fmap_bspline=False,
    eddy_config=None,
    source_file='/path/to/dwi/sub-X_dwi.nii.gz',
    omp_nthreads=1,
)