| Sonographic detection of renal and ureteral stones. Value of the twinkling sign. | |
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MedLine Citation:
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PMID: 19860931 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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PURPOSE: To compare the detection of urinary stones using standard gray scale ultrasound for diagnostic accuracy using the color Doppler "twinkling sign". MATERIALS AND METHODS: Our study population consisted of forty-one patients who demonstrated at least one urinary stone on unenhanced CT evaluation of the kidneys or ureters. Each patient was evaluated using gray scale ultrasound and color Doppler imaging by an observer who was blinded to the CT results. RESULTS: Seventy-seven stones were present in 41 patients, including 47 intrarenal stones, 5 stones in the renal pelvis, 8 stones at the ureteropelvic junction, 5 ureteral stones and 12 stones at the ureterovesical junction. Based upon gray scale sonography the diagnosis of stone was made with confidence in 66% (51/77) of locations. Based upon Doppler sonography using the twinkling sign, the diagnosis of stone was made with confidence in 97% (75/77) of locations. Clustered ROC analysis demonstrated that the Doppler twinkling sign (Az = 0.99) was significantly better than conventional gray scale criteria (Az = 0.95) for the diagnosis of urinary stones (p = 0.005, two-sided test). CONCLUSIONS: The color Doppler twinkling sign improves the detection, confidence and overall accuracy of diagnosis for renal and ureteral stones with minimal loss of specificity. |
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Authors:
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Michael Mitterberger; Friedrich Aigner; Leo Pallwein; Germar-Michael Pinggera; Richard Neururer; Peter Rehder; Ferdinand Frauscher |
Publication Detail:
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Type: Comparative Study; Journal Article |
Journal Detail:
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Title: International braz j urol : official journal of the Brazilian Society of Urology Volume: 35 ISSN: 1677-6119 ISO Abbreviation: Int Braz J Urol Publication Date: 2009 Sep-Oct |
Date Detail:
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Created Date: 2009-10-28 Completed Date: 2010-12-02 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101158091 Medline TA: Int Braz J Urol Country: Brazil |
Other Details:
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Languages: eng Pagination: 532-9; discussion 540-1 Citation Subset: IM |
Affiliation:
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Department of Urology, Medical University Innsbruck, Innsbruck, Austria. Michael.Mitterberger@i-med.ac.at |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adult Aged Contrast Media / diagnostic use Female Humans Kidney Calculi / radiography, ultrasonography* Male Middle Aged ROC Curve Reproducibility of Results Sensitivity and Specificity Tomography, X-Ray Computed Ultrasonography, Doppler, Color* Ureteral Calculi / radiography, ultrasonography* Young Adult |
| Chemical | |
Reg. No./Substance:
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0/Contrast Media |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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