Problem…

dcm2niix does not convert rf_map sequence correctly / DICOMs are not properly saved

Solution

fslsplit DICOM_SMPM_rf_map_sag_20230210141347_19_phMag.nii slice_ -z

fslmerge -z interleaved_b \\
  slice_0027 slice_0018 \\
  slice_0028 slice_0019 \\
  slice_0029 slice_0020 \\
  slice_0030 slice_0021 \\
  slice_0031 slice_0022 \\
  slice_0032 slice_0023 \\
  slice_0033 slice_0024 \\
  slice_0034 slice_0025 \\
  slice_0035 slice_0026

fslcpgeom slice_0019.nii.gz interleaved_b.nii.gz -d

fslmerge -z interleaved_a \\
  slice_0009 slice_0000 \\
  slice_0010 slice_0001 \\
  slice_0011 slice_0002 \\
  slice_0012 slice_0003 \\
  slice_0013 slice_0004 \\
  slice_0014 slice_0005 \\
  slice_0015 slice_0006 \\
  slice_0016 slice_0007 \\
  slice_0017 slice_0008

fslcpgeom slice_0019.nii.gz interleaved_a.nii.gz -d
  
  

published https://github.com/nencki-lobi/lobi-mri-scripts/blob/main/dcm2bids/repair_rfmap.sh