from fmriprep.workflows.bold.registration import init_bold_reg_wf
wf = init_bold_reg_wf(freesurfer=True,
                      mem_gb=3,
                      omp_nthreads=1,
                      use_bbr=True,
                      bold2t1w_dof=9,
                      bold2t1w_init='register')