Computed tomography findings in rhinosinusitis

Computed tomography (CT) findings in rhinosinusitis:
(A) Coronal CT demonstrating complete opacification of the right ethmoid sinus (arrow) and mucosal thickening of the roof of the right maxillary sinus (arrowhead).
(B) Axial CT demonstrating air-fluid level (dashed arrow) in the right maxillary sinus.