title: Gas encephalography with polytome.
mesh_terms: D001932:Brain Neoplasms / Q000000981:diagnostic imaging*; D003388:Cranial Fossa, Posterior; D006801:Humans; D007031:Hypothalamus; D008722:Methods; D011011:Pneumoencephalography; D013788:Thalamus; D014056:Tomography, X-Ray