title: Delineation of the obex by contrast radiography during percutaneous trigeminal tractotomy. Technical note.
mesh_terms: D014695:Cerebral Ventriculography; D003287:Contrast Media; D004805:Ependyma / Q000000981:diagnostic imaging*; D006801:Humans; D008297:Male; D008526:Medulla Oblongata / Q000000981:diagnostic imaging; D008722:Methods; D013238:Stereotaxic Techniques; D014276:Trigeminal Nerve / Q000601:surgery*; D014277:Trigeminal Neuralgia / Q000601:surgery*
chemical_list: D003287:Contrast Media