Author： Blandino A. Gaeta M. Minutoli F. Scribano E. Vinci S. Famulari C. Pandolfo I.
Publisher： Blackwell Publishing
ISSN： 0284-1851
Source： Acta Radiologica, Vol.42, Iss.5, 2001-09, pp. : 532-536
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Abstract
AbstractPurpose:To evaluate the accuracy of MR pyelography in the assessment of hydroureteronephrosis.Material and Methods:One hundred and fifteen patients, with variable degree of hydroureteronephrosis demonstrated by US and urography were subjected to MR pyelography obtained by means of two ultra-fast sequences.Results:Of the 228 kidneys examined, the collecting systems of 130 kidneys were dilated and correctly identified on MR pyelography, with only 2 false-positive results. The specificity of MR pyelography in detecting hydronephrosis was 98%. Accuracy in revealing level of obstruction was 100%. Sensitivity in detecting stones, strictures and congenital ureteropelvic junction obstructions was respectively 68.9%, 98.5% and 100%.Conclusion:MR pyelography can rapidly and accurately depict the morphological features of dilated urinary tracts with information regarding the degree and level of obstruction, without using contrast medium or ionizing radiation.
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