In radiographic interpretation, which term indicates the maxillary sinus is opacified?

• A. Displaced
• B. Not visualized
• C. Opacified
• D. Intact

Answer: (C)

On radiographs, air-filled spaces like a normal maxillary sinus look dark because air is low density. When the sinus fills with fluid, mucus, edema, or a mass, it becomes more radiodense and appears lighter—this change is called opacification. So the term that best indicates the maxillary sinus is filled and no longer air-filled is opacified.

Displaced would mean the sinus or its contents have shifted from their normal position, not just density changes. Not visualized means the sinus isn’t seen on the image at all, which can reflect technique or anatomy, not necessarily opacification. Intact describes a normal, aerated sinus.