| Limitations of Ultrasonography in the Evaluation of Urolithiasis: A Correlation With Computed Tomography. | |
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MedLine Citation:
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PMID: 22010975 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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Abstract Background and Purpose: Cumulative radiation exposure from imaging studies is hazardous. In chronic diseases such as urolithiasis, efforts are made to limit radiation exposure, particularly for routine surveillance. We sought to determine the correlation of ultrasonography (US) compared with noncontrast CT (NCCT) in detecting and determining size of stones. Patients and Methods: Findings were evaluated in patients who underwent both imaging modalities within a 90-day period between July 2008 and June 2010. Urinary calculi were noted on NCCT in 72 patients. The sensitivity of US to determine the number, size, and location of the stones as described on official radiology reports were compared in reference to NCCT. Results: There were 203 urinary calculi in 90 urinary tracts identified on NCCT imaging. The sensitivity, specificity, and accuracy of detecting specific stones on US were 40%, 84%, and 53%. Correlation between US and NCCT findings decreased with smaller stone size and ureteral location and increased with right-sided laterality. For identified stones, larger stone size discrepancies were noted in up to one-third of stones on US. Conclusions: Despite concern for excessive radiation exposure, urologists should recognize limitations of US in the evaluation of urolithiasis. As the ideal study to image stones, particularly for routine surveillance, remains unclear, tese data also supports the need for low-dose NCCT protocols and/or selective use of alternative modalities, such as magnetic resonance urography. |
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Authors:
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Davis P Viprakasit; Mark D Sawyer; S Duke Herrell; Nicole L Miller |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-10-19 |
Journal Detail:
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Title: Journal of endourology / Endourological Society Volume: - ISSN: 1557-900X ISO Abbreviation: - Publication Date: 2011 Oct |
Date Detail:
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Created Date: 2011-10-20 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8807503 Medline TA: J Endourol Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Affiliation:
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Department of Urologic Surgery, Vanderbilt University Medical Center , Nashville, Tennessee. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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