[Comparative magnetic resonance imaging of renal space-occupying lesions with a high and low field MRI system]

Rofo. 1998 Nov;169(5):484-9. doi: 10.1055/s-2007-1015324.
[Article in German]


Purpose: A prospective study of the diagnostic accuracy and image quality of two MRI systems in the detection of renal tumors was investigated.

Materials and 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.

Publication types

  • Comparative Study
  • English Abstract

MeSH terms

  • Diagnostic Errors
  • False Negative Reactions
  • False Positive Reactions
  • Gadolinium DTPA
  • Humans
  • Kidney / pathology*
  • Kidney Diseases, Cystic / diagnosis*
  • Kidney Neoplasms / diagnosis*
  • Magnetic Resonance Imaging / methods*
  • Observer Variation
  • Prospective Studies
  • Reproducibility of Results
  • Sensitivity and Specificity


  • Gadolinium DTPA