[X-ray study of the nasopharynx--with special reference to radiography at 200KV].
D000328:Adult; D002648:Child; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009303:Nasopharyngeal Neoplasms / Q000000981:diagnostic imaging*; D009305:Nasopharynx / Q000000981:diagnostic imaging*; D011859:Radiography; D013679:Technology, Radiologic; D014054:Tomography