option "firstIndex" f "First index value (in voxels)" int yes multiple
option "lastIndex" l "Last index value (in voxels" int yes multiple
+option "integral" I "Integrate the image along a line" int no default = "0"
+option "integralAxis" a "Set the image integration axis" int no default = "0"
option "mm" m "Last/first index are in mm" flag off