| Limitations of noncontrast CT for measuring ureteral stones. | |
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MedLine Citation:
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PMID: 14744347 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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BACKGROUND AND PURPOSE: Patients with renal colic are frequently evaluated in the emergency room with a helical noncontrast CT scan (NCCT) as the primary imaging modality. Treatment decisions are often based on the size of the ureteral stone(s). We wished to assess the accuracy of NCCT in estimating ureteral stone size compared with plain abdominal (KUB) films. PATIENTS AND METHODS: Forty-eight patients were identified who had ureteral stones seen on NCCT and KUB films performed on the same day. The number of consecutive images on which a ureteral stone was visible on NCCT was multiplied by the reconstruction interval of 5 mm to create a size estimate, which was compared with the measurements of the same stone seen on the KUB film. RESULTS: The NCCT overestimated stone size by approximately 30% to 50% compared with KUB. CONCLUSION: Counting the number of consecutive NCCT images depicting a ureteral stone is not an accurate method of stone measurement when a reconstruction interval of 5 mm is used. Urologists should consider stone measurement techniques carefully and understand the limitations of imaging studies when evaluating patients with symptomatic ureteral stones. |
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Authors:
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Scott Van Appledorn; Adam J Ball; Vipul R Patel; Sandy Kim; Raymond J Leveillee |
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Publication Detail:
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Type: Comparative Study; Journal Article |
Journal Detail:
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Title: Journal of endourology / Endourological Society Volume: 17 ISSN: 0892-7790 ISO Abbreviation: J. Endourol. Publication Date: 2003 Dec |
Date Detail:
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Created Date: 2004-01-27 Completed Date: 2004-04-23 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 8807503 Medline TA: J Endourol Country: United States |
Other Details:
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Languages: eng Pagination: 851-4; discussion 854 Citation Subset: IM |
Affiliation:
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Department of Urology, University of Miami School of Medicine, Miami, FL 33136, USA. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Analysis of Variance Cohort Studies Female Humans Male Probability Radiography, Abdominal / methods* Retrospective Studies Sensitivity and Specificity Severity of Illness Index Tomography, X-Ray Computed / methods* Ureteral Calculi / physiopathology, radiography* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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