Lesser wing of the sphenoid
Ans:D.)Lesser wing of the Sphenoid.
X ray Paranasal Sinus:Caldwell View:1, Superior orbital fissure. 2, Greater wing of sphenoid. 3, Lesser wing of sphenoid. 4, Frontal sinus. 5, Petrous bone.
Caldwell’s view (or Occipitofrontal view) is a radiographic view of skull, where X-ray plate is angled at 20° to orbitomeatal line. The rays pass from behind the head and are perpendicular to radiographic plate. It is commonly used to get better view of frontal sinuses.