Question

Water's view is used to obtain diagnostic information of:

• A. Maxillary sinus
• B. Ethmoidal sinuses
• C. Frontal sinus
• D. Sphenoid sinus

Hint:

Occipitomental 45 degree view that clears the petrous bones off the antra.

Answer 1

The Correct Option is A

Step 1: Waters' view, also called the occipitomental view, is a radiographic projection in which the X-ray beam is angled at about 45 degrees to the orbitomeatal line, passing from behind the head perpendicular to the film.
Step 2: This angulation projects the dense petrous temporal bones below the floor of the maxillary antra, so the maxillary sinuses are seen clearly without bony overlap. It is the best plain view to detect an air-fluid level in maxillary sinusitis.
Step 3: The frontal sinus and ethmoidal sinuses are best shown on the Caldwell (occipitofrontal) view, not Waters', so options (c) and (b) are wrong. The sphenoid sinus needs a lateral or submentovertical view, so (d) is wrong.
Step 4: Therefore the correct answer is the maxillary sinus, option (a).