==Evaluation==
[[File:CT of chronic sinuitis.jpg|thumb|250px|Right-sided chronic sinusitis, with sclerotic thickened wall.]]
*Mucus content in paranasal sinuses, particularly the ostiomeatal complex.<gallery>File:CT of the ostiomeatal complex, coronal plane, with annotations.png|Ostiomeatal complex (green area)</gallery>
*Any sclerotic thickening of the walls of the sinuses, indicating chronic sinusitis.
*Any abnormal protrusion of teeth into the maxillary sinuses.<ref name="ScheinfeldShifteh2012">{{cite journal|last1=Scheinfeld|first1=Meir H.|last2=Shifteh|first2=Keivan|last3=Avery|first3=Laura L.|last4=Dym|first4=Harry|last5=Dym|first5=R. Joshua|title=Teeth: What Radiologists Should Know|journal=RadioGraphics|volume=32|issue=7|year=2012|pages=1927–1944|issn=0271-5333|doi=10.1148/rg.327125717}}</ref>
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