| Visualization of urinary tract dilatation: value of single-shot MR urography. | |
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MedLine Citation:
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PMID: 9377515 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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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. |
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Authors:
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G Reuther; B Kiefer; E Wandl |
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Publication Detail:
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Type: Comparative Study; Journal Article |
Journal Detail:
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Title: European radiology Volume: 7 ISSN: 0938-7994 ISO Abbreviation: Eur Radiol Publication Date: 1997 |
Date Detail:
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Created Date: 1997-11-12 Completed Date: 1997-11-12 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 9114774 Medline TA: Eur Radiol Country: GERMANY |
Other Details:
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Languages: eng Pagination: 1276-81 Citation Subset: IM |
Affiliation:
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Abteilung Bildgebende Diagnostik, Privatklinik und Ambulatorium Döbling, Heiligenstädter Strasse 57-63, A-1190 Vienna, Austria. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adult Dilatation, Pathologic / diagnosis, etiology Female Humans Hydronephrosis / diagnosis*, etiology Kidney Calculi / complications, diagnosis Magnetic Resonance Imaging / methods* Male Middle Aged Sensitivity and Specificity Ureteral Obstruction / diagnosis*, etiology Urography |
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