Question

Caldwell's view is used for:

• A. Maxillary sinus
• B. Frontal sinus
• C. Ethmoidal sinus
• D. All of the above

Hint:

Occipitofrontal 20 degree view, the partner of Waters' for the front of the skull.

Answer 1

The Correct Option is B

Step 1: Caldwell's view, also called the occipitofrontal view, is a skull radiograph in which the X-ray plate is angled at about 20 degrees to the orbitomeatal line, with the rays passing from behind the head perpendicular to the plate.
Step 2: This angulation projects the frontal sinuses clearly and is the standard plain view to assess them; it also shows the ethmoid air cells reasonably well.
Step 3: The maxillary sinus is best seen on Waters' (occipitomental) view, not Caldwell's, so option (a) and the blanket option (d) are not the single best answer in this exam stem.
Step 4: The intended answer is the frontal sinus, option (b).