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Renal Stone Detection Using Unenhanced Multidetector Row Computerized Tomography—Does Section Width Matter?

2009; Lippincott Williams & Wilkins; Volume: 181; Issue: 6 Linguagem: Inglês

10.1016/j.juro.2009.01.092

1527-3792

Daniel Jin, Gregory R. Lamberton, Dale R. Broome, Hans P. Saaty, Shravani Bhattacharya, Tekisha U. Lindler, D. Duane Baldwin,

Radiation Dose and Imaging

No AccessJournal of UrologyInvestigative Urology1 Jun 2009Renal Stone Detection Using Unenhanced Multidetector Row Computerized Tomography—Does Section Width Matter?is companion ofComparison of Endourological and Open Cystolithotomy in the Management of Bladder Stones in Children Daniel H. Jin, Gregory R. Lamberton, Dale R. Broome, Hans Saaty, Shravani Bhattacharya, Tekisha U. Lindler, and D. Duane Baldwin Daniel H. JinDaniel H. Jin , Gregory R. LambertonGregory R. Lamberton , Dale R. BroomeDale R. Broome , Hans SaatyHans Saaty , Shravani BhattacharyaShravani Bhattacharya , Tekisha U. LindlerTekisha U. Lindler , and D. Duane BaldwinD. Duane Baldwin View All Author Informationhttps://doi.org/10.1016/j.juro.2009.01.092AboutFull TextPDF ToolsAdd to favoritesDownload CitationsTrack CitationsPermissionsReprints ShareFacebookLinked InTwitterEmail Abstract Purpose: We determined the effect of reconstructed section width on sensitivity and specificity for detecting renal calculi using multidetector row computerized tomography. Materials and Methods: Three to 5 renal stones 2 to 4 mm in size were randomly placed into 14 human cadaveric kidneys and scanned by 16-row detector computerized tomography at 1.25 mm collimation and identical scanning parameters. After acquisition images were reconstructed with a section width of 1.25, 2.5, 3.75 and 5.0 mm, and reviewed independently by 2 blinded radiologists. Comparisons of sensitivity and specificity between different section widths were assessed with the McNemar test and Cochran's Q statistics. Results: Specificity was not significantly affected by section width (94.6% to 97.7%). In contrast, sensitivity increased as stone size increased and as section width decreased. Sensitivity to detect all stones was 80.7%, 80.7%, 87.7% and 92.1% for 5.0, 3.75, 2.5 and 1.25 mm section widths, respectively. Interobserver agreement for stone detection was excellent (κ 0.858). Although the 2.0 mm stone detection rate improved with thinner section widths (79.4% vs 52.9% for 1.25 vs 5.0 mm, p = 0.004), stones greater than 2.0 mm were similarly detected at different slice selections (p = 0.056 to 0.572). Conclusions: Independent of other scanning parameters reconstruction section width influences the ability to detect small renal calculi. It must be considered when creating computerized tomography protocols. References 1 : Acute flank pain: comparison of non-contrast-enhanced CT and intravenous urography. Radiology1995; 194: 789. Google Scholar 2 : Unenhanced multi-detector row CT in patients suspected of having urinary stone disease: effect of section width on diagnosis. 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Google Scholar Departments of Urology and Radiology (DRB, HS), Loma Linda University Medical Center, Loma Linda, California© 2009 by American Urological AssociationFiguresReferencesRelatedDetailsRelated articlesJournal of Urology16 Apr 2009Comparison of Endourological and Open Cystolithotomy in the Management of Bladder Stones in Children Volume 181Issue 6June 2009Page: 2767-2773 Advertisement Copyright & Permissions© 2009 by American Urological AssociationKeywordsdiagnostic imagingcadaverx-ray computedtomographynephrolithiasiskidneyMetricsAuthor Information Daniel H. Jin More articles by this author Gregory R. Lamberton More articles by this author Dale R. Broome Financial interest and/or other relationship with GE Healthcare and Bracco Diagnostic. More articles by this author Hans Saaty More articles by this author Shravani Bhattacharya More articles by this author Tekisha U. Lindler More articles by this author D. Duane Baldwin Financial interest and/or other relationship with Onset Medical. More articles by this author Expand All Advertisement PDF downloadLoading ...