title: Cephalometric roentgenographic study of the upper airway of conscious patients in supine position for endotracheal anesthesia. (I) Measurements of normal subjects.
mesh_terms: D000293:Adolescent; D000328:Adult; D000770:Anesthesia, Endotracheal; D002508:Cephalometry; D004825:Epiglottis / Q000033:anatomy & histology; D006801:Humans; D008875:Middle Aged; D010614:Pharynx / Q000033:anatomy & histology; D011187:Posture; D011859:Radiography; D012137:Respiratory System / Q000000981:diagnostic imaging*; D014132:Trachea / Q000033:anatomy & histology