Four diameters of the roof and posterior wall of the nasopharynx in the lateral neck radiograph.
D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D002508:Cephalometry; D002648:Child; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009303:Nasopharyngeal Neoplasms / Q000000981:diagnostic imaging*; D009305:Nasopharynx / Q000033:anatomy & histology / Q000000981:diagnostic imaging*; D009333:Neck / Q000000981:diagnostic imaging*; D011859:Radiography; D012737:Sex Factors