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 · Sinuses The aircontaining cavities situated in the frontal, ethmoidal, and sphenoidal bones of the cranium and the maxillary bones of the face are called the paranasal sinuses because of their formation from the nasal mucosa and their continued communication with the nasal fossae (Figs 221 and 222)Although the functions of the sinuses are not agreed on by all anatomists, · 2 Paranasal sinuses Water's view Caldwell view Lateral view Submentovertical view Right and left vertical view 3 Water's view Also called as occipitomental view or nosechin position In 1914,Dr CAWaters and CWWaldron,two British radiologists introduced this view Nose and chin touch the film and X ray beam is projected from occipital · Paranasal sinuses Maxillary sinus Sphenoid sinus 13 Positioning 14 PA 15 Caldwell Position Image 15 Occipito Mental OM (Waters) Position Image 16 Lateral View Position Image 17 RadiologicAnatomy 18 Plain Xray 19 Nasal Bones Ent Radiology Paranasal sinuses x ray anatomy