[Comparative magnetic resonance imaging of renal space-occupying lesions with a high and low field MRI system].
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.
Gehl
H B
HB
Institut für Radiologie, Medizinische Universität, Lübeck. gehl@medinf.mu-luebeck.de
Lorch
H
H
Amblank
O B
OB
Engerhoff
B
B
Weiss
H D
HD
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
D019786:Gadolinium DTPA
Vergleichende magnetresonanztomographische Darstellung renaler Raumforderungen an einem Hoch- und einem Niederfeld-MRT-System.