title: Experimental explanation of maxillary sinus radiopacity as seen by Waters' and panoramic projections.
mesh_terms: D003287:Contrast Media / Q000008:administration & dosage; D006801:Humans; D008443:Maxillary Sinus / Q000000981:diagnostic imaging*; D008722:Methods; D011862:Radiography, Panoramic
chemical_list: D003287:Contrast Media