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: Recall the pair of sinus views. Waters' is the maxillary view; Caldwell's (occipitofrontal, 20 degree tilt) is the complementary projection.
Step 2: Because the beam runs front-to-back with only a small tilt, the frontal sinuses are thrown into clear relief, which is precisely the structure Caldwell's view is named for in radiology teaching.
Step 3: Although the ethmoids are also visualised, the maxillary antra are reserved for Waters'. The single best fit demanded here is therefore the frontal sinus, not "all of the above".
Step 4: Caldwell's view = frontal sinus.
\[\boxed{\text{Frontal sinus}}\]