title: Vena cavography relative to umbrella filter placement.
mesh_terms: D000328:Adult; D002309:Cardiology / Q000295:instrumentation*; D005374:Filtration; D006801:Humans; D008297:Male; D008722:Methods; D011654:Pulmonary Edema / Q000517:prevention & control*; D011859:Radiography; D012008:Recurrence; D014684:Venae Cavae / Q000000981:diagnostic imaging*