Document Detail

Visualization of urinary tract dilatation: value of single-shot MR urography.
MedLine Citation:
PMID:  9377515     Owner:  NLM     Status:  MEDLINE    
The purpose of this study was to evaluate detection of urinary tract dilatation, depiction of obstruction level and determination of cause with single-shot MR imaging in an acquisition time of 2.8 s. Heavily T2-weighted single-shot MR images in 50 patients with ureterohydronephrosis as suspected by ultrasound were prospectively compared with IV urography and clinical outcome. Imaging techniques were obtained within a maximum time interval of 4 h and assessed independently on the same day. Single-shot MR urography was able to demonstrate dilatation and obstruction levels in 96 % of urinary tracts in accordance with X-ray urograms. In 4 patients with a unilaterally negative IV urogram, obstruction levels were demonstrated in single-shot MR urography. Single-shot MR urography did not depict 2 of 7 collecting systems with mild dilatation and contralateral undilated ureters were not adequately visible. Single-shot MR urography consistently visualizes dilated urinary tracts and obstruction levels in moderate and severe dilatation. Single-shot MR urography may be an alternative for IV urography in cases of renal impairment, when iodinated contrast or the application of X-rays is contraindicated, and may help in avoiding direct ureteropyelography. Single-shot MR urography rarely allows determination of the cause of urinary tract dilatation.
G Reuther; B Kiefer; E Wandl
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Publication Detail:
Type:  Comparative Study; Journal Article    
Journal Detail:
Title:  European radiology     Volume:  7     ISSN:  0938-7994     ISO Abbreviation:  Eur Radiol     Publication Date:  1997  
Date Detail:
Created Date:  1997-11-12     Completed Date:  1997-11-12     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  9114774     Medline TA:  Eur Radiol     Country:  GERMANY    
Other Details:
Languages:  eng     Pagination:  1276-81     Citation Subset:  IM    
Abteilung Bildgebende Diagnostik, Privatklinik und Ambulatorium Döbling, Heiligenstädter Strasse 57-63, A-1190 Vienna, Austria.
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MeSH Terms
Dilatation, Pathologic / diagnosis,  etiology
Hydronephrosis / diagnosis*,  etiology
Kidney Calculi / complications,  diagnosis
Magnetic Resonance Imaging / methods*
Middle Aged
Sensitivity and Specificity
Ureteral Obstruction / diagnosis*,  etiology

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