Image Based Question – 65246

Which among the following Paranasal sinus can be visualized best on a occipito-frontal view?

A. A- Frontal sinus.

B. B- Ethmoid sinus.

C. C-Sphenoid sinus.

D. D- Maxillary sinus.

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Correct Answer » A Explanation

Ans:A. Frontal sinus.

Paranasal sinus which can be visualized best on a occipito-frontal view is Frontal sinus which is represented as “A” in the picture above.

Caldwell-Luc/ occipito-frontal view shows:

• Frontal sinus (Best visualization)

• Superior orbital fissure

• Superior marginof orbit and lamina papyracea

• Foramen rotundum

• Maxillary and ethmoid sinus.

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 SINUS.