title: [Comparative magnetic resonance imaging of renal space-occupying lesions with a high and low field MRI system].
abstract: OBJECTIVE
  A prospective study of the diagnostic accuracy and image quality of two MRI systems in the detection of renal tumors was investigated.
  
  
  METHODS
  34 patients with the clinical suspicion of a space-occupying renal lesion were examined by MRI with a low field (0.2 Tesla magnet) and a high field (1.5 Tesla magnet) for comparison. An "informed" and a "blind" observer evaluated all of the MR images. In addition, the signal-to-noise and contrast-to-noise ratios were evaluated as second quality parameters.
  
  
  RESULTS
  In 29 cases the results could be compared with a confirmed release diagnosis. Diagnostic accuracy was comparable with both systems (Sensitivity for both observer on LF apparatus: 83%, HF apparatus: 81%) although the signal-to-noise and contrast-to-noise ratios were significantly poorer at low field.
  
  
  CONCLUSIONS
  The low field system in comparable to the high field MRI for detection and differentiation of renal space-occupying lesions.
authors.affiliation: Institut für Radiologie, Medizinische Universität, Lübeck. gehl@medinf.mu-luebeck.de
authors.forename: H B
authors.initials: HB
authors.lastname: Gehl
authors.forename: H
authors.initials: H
authors.lastname: Lorch
authors.forename: O B
authors.initials: OB
authors.lastname: Amblank
authors.forename: B
authors.initials: B
authors.lastname: Engerhoff
authors.forename: H D
authors.initials: HD
authors.lastname: Weiss
mesh_terms: D003951:Diagnostic Errors; D005188:False Negative Reactions; D005189:False Positive Reactions; D019786:Gadolinium DTPA; D006801:Humans; D007668:Kidney / Q000473:pathology*; D052177:Kidney Diseases, Cystic / Q000175:diagnosis*; D007680:Kidney Neoplasms / Q000175:diagnosis*; D008279:Magnetic Resonance Imaging / Q000379:methods*; D015588:Observer Variation; D011446:Prospective Studies; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity
chemical_list: D019786:Gadolinium DTPA
vernacular_title: Vergleichende magnetresonanztomographische Darstellung renaler Raumforderungen an einem Hoch- und einem Niederfeld-MRT-System.