DEV: improved offset
DEV: improved offset

Former-commit-id: 96ec77d4bbb19dbb4b36b0b47b8d4f73d2c8d0f4
Former-commit-id: 8bc02d54c487910d7d42fb7d2cb1f09d72ccb69b
3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox