option "reference" r "Input reference 3D image (float)" string yes
option "target" t "Input target 2D image (float)" string yes
-option "referenceMask" m "Mask to placed over the reference image" string no
+option "referenceMask" m "Mask or labels to placed over the reference image" string no
option "targetMask" - "Mask to placed over the target image" string no
section "Output"