OPT: removed 2-step approach
OPT: removed 2-step approach

Former-commit-id: 9f287792979dc255dc7404bb58ce8bd50c97a7ca [formerly 68730f3d1448395d4af2c6dba3a96037085a5aa5]
Former-commit-id: af3886bf5997fa376431e42780c7825a5baebdd8
Former-commit-id: 274fcd4e729cbfd26f35ec40667c4dff66abe43c
neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox