title: [Experiences with a 3-D ultrasound system in infant hip joints].
abstract: OBJECTIVE
  To test the possibilities of 3-dimensional sonography in diagnosing congenital hip dysplasia.
  
  
  METHODS
  128 infant hip joints were examined by 4 investigators with different levels of experience. The Kretz Combison 530 machine additionally equipped with an automatic 5 MgHz transducer and volume box system was employed.
  
  
  RESULTS
  The average time to determine the standard plane was 21 seconds. The single standard deviation for alpha values in the 3-dimensional system was 3.0 degrees, compared to 1.37 degrees in the conventional system. Observer experience was not a crucial factor.
  
  
  CONCLUSIONS
  The described 3-dimensional system makes it quicker and simpler to determine the standard plane when evaluating infant hips. The higher standard deviation is possibly caused by the obliquity of the ultrasonic beam. Ossification defects on the acetabular roof are better visualized with this approach than with conventional ultrasound or radiological methods. Even though 3-dimensional ultrasound represents a new approach to infant hips, it seems worthy of rapid development.
authors.affiliation: Allgemeines und Orthopädisches Landeskrankenhaus Stolzalpe.
authors.forename: R
authors.initials: R
authors.lastname: Graf
authors.forename: K
authors.initials: K
authors.lastname: Lercher
mesh_terms: D000077:Acetabulum / Q000002:abnormalities / Q000000981:diagnostic imaging; D003937:Diagnosis, Differential; D005260:Female; D005500:Follow-Up Studies; D006618:Hip Dislocation, Congenital / Q000000981:diagnostic imaging* / Q000628:therapy; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000295:instrumentation*; D007223:Infant; D007231:Infant, Newborn; D008297:Male; D014159:Transducers; D014463:Ultrasonography / Q000295:instrumentation*
vernacular_title: Erfahrungen mit einem 3-D-Sonographiesystem am Säuglingshüftgelenk.