title: The vacuum arthrogram in the acutely injured knee: a case report.
abstract: Distraction of joints during radiography may produce a vacuum phenomenon. This is abolished by the presence of free fluid, and thus could be taken to indicate the absence of a serious acute injury. A case is presented of a vacuum arthrogram occurring in the presence of serious acute intra-articular trauma.
authors.affiliation: Royal Free Hospital, London, England.
authors.forename: C G
authors.initials: CG
authors.lastname: Greenough
mesh_terms: D000208:Acute Disease; D001175:Arthrography / Q000379:methods*; D002358:Cartilage, Articular / Q000000981:diagnostic imaging* / Q000473:pathology; D006801:Humans; D007718:Knee Injuries / Q000000981:diagnostic imaging*; D008297:Male; D008875:Middle Aged; D014618:Vacuum