option "lungBG" - "Lung Background" int default="0" no
option "lungLeft" - "Lung Left value" int default="1" no
option "lungRight" - "Lung Right value" int default="2" no
+option "trachea" t "Input trachea mask filename" string yes
+option "tracheaBG" - "Trachea Background" int default="0" no
option "output" o "Output lungs mask filename" string yes