DOC: msct_image: added TODO
DOC: msct_image: added TODO

Former-commit-id: 7ff738725c51799acf58f93ddd9ec70cb6f0835a
Former-commit-id: 476ac0e0b4b4eea418f79946372b4591239020b8
3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox