title: [Middle field and low field magnetic resonance tomography in wrist injuries].
abstract: OBJECTIVE
  To evaluate the diagnostic value of magnet resonance imaging in comparison of a dedicated 0.2-T unit and a 1.0-T unit in patients with clinically suspected scaphoid fractures and other wrist fractures.
  
  
  METHODS
  In 20 patients (14 m/6 f) with clinically suspected scaphoid fractures and a normal six view radiographic exam, magnet resonance imaging was performed first with the dedicated 1.0-T unit and afterwards with the 0.2-T unit within 7 days after trauma. T1 weighted spin-echo, STIR and T2-weighted 3D GRE sequences were performed.
  
  
  RESULTS
  The 0.2 Tesla dedicated system is inferior to the 1.0 Tesla unit concerning the outcome of the 3 examiners. Especially the areas of bone bruise showed different results: each examiner detected at least two more cases of bone bruise with the 1.0 Telsa unit, which could not be defined with the 0.2 Tesla unit.
  
  
  CONCLUSIONS
  This study shows, how utmost sensitive magnet resonance imaging is referring to unremoved fractures of the scaphoid and to other wrist abnormalities. Results with the 0.2 Tesla dedicated system was inferior compared to the 1.0 Tesla unit.
authors.affiliation: Universitätsklinik für Radiodiagnostik, Währinger Gürtel 18-20, A-1090 Wien. brigitte.happel@univie.ac.at
authors.forename: Brigitte
authors.initials: B
authors.lastname: Happel
authors.forename: M
authors.initials: M
authors.lastname: Breitenseher
authors.forename: S
authors.initials: S
authors.lastname: Trattnig
authors.forename: Ch
authors.initials: Ch
authors.lastname: Gäbler
authors.forename: Ch
authors.initials: Ch
authors.lastname: Kukla
authors.forename: Th
authors.initials: T
authors.lastname: Rand
authors.forename: H
authors.initials: H
authors.lastname: Imhof
authors.forename: G
authors.initials: G
authors.lastname: Lechner
mesh_terms: D000293:Adolescent; D000328:Adult; D001853:Bone Marrow / Q000473:pathology; D004867:Equipment Design; D005260:Female; D050723:Fractures, Bone / Q000175:diagnosis*; D006801:Humans; D007089:Image Enhancement / Q000295:instrumentation*; D008279:Magnetic Resonance Imaging / Q000295:instrumentation*; D008297:Male; D008875:Middle Aged; D015588:Observer Variation; D021361:Scaphoid Bone / Q000293:injuries* / Q000473:pathology; D012680:Sensitivity and Specificity; D014954:Wrist Injuries / Q000175:diagnosis*