title: Apparatus to position knees for varus-valgus stress roentgenograms.
mesh_terms: D005069:Evaluation Studies as Topic; D006801:Humans; D007718:Knee Injuries / Q000000981:diagnostic imaging*; D007719:Knee Joint / Q000000981:diagnostic imaging*; D011859:Radiography; D013314:Stress, Mechanical; D013679:Technology, Radiologic / Q000295:instrumentation*