[Application of tomography in tracheal tumor].
D002294:Carcinoma, Squamous Cell / Q000000981:diagnostic imaging*; D003036:Cobalt Isotopes; D006801:Humans; D008297:Male; D008875:Middle Aged; D011859:Radiography; D014054:Tomography; D014134:Tracheal Neoplasms / Q000000981:diagnostic imaging*
D003036:Cobalt Isotopes