REF: moved imports at the beginning of the file
REF: moved imports at the beginning of the file

Former-commit-id: 7030facff2ddd065c37259cb251fe85edf2e4388
neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox