option "mediastinum" m "Input mediastinum mask filename" string yes
option "trachea" t "Input trachea mask filename" string yes
option "output" o "Output lungs mask filename" string yes
option "mediastinum" m "Input mediastinum mask filename" string yes
option "trachea" t "Input trachea mask filename" string yes
option "output" o "Output lungs mask filename" string yes