| Coronal reconstruction of unenhanced abdominal CT for correct ureteral stone size classification. | |
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MedLine Citation:
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PMID: 19890646 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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PURPOSE: To determine whether size measurement of a urinary calculus in coronal reconstruction of computed tomography (CT) differs from stone size measured in the axial plane, and whether the difference alters clinical decision making. METHODS: We retrospectively reviewed unenhanced CT examinations of 150 patients admitted to the emergency room (ER) with acute renal colic. Maximal ureteral calculus size was measured on axial slices and coronal reconstructions. Clinical significance was defined as an upgrading or downgrading of stone size according to accepted thresholds of treatment: < or =5 mm, 6-9 mm and > or =10 mm. RESULTS: There were 151 stones in 150 patients (male:female 115:34, mean age 41 years). Transverse stone diameters ranged from 1 to 11 mm (mean 4 mm). On coronal images, 56 (37%) stones were upgraded in severity; 46 (30%) from below 5 mm to 6 mm or more, and ten (7%) from 6-9 mm to 10 mm or more. Transverse measurement on the axial slices enabled correct categorization of 95 stones (63%). CONCLUSION: Transverse calculus measurement on axial slices often underestimates stone size and provides incorrect clinical classification of the true maximal stone diameter. Coronal reconstruction provides additional information in patients with renal colic that may alter treatment strategy. |
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Authors:
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Nadav Berkovitz; Natalia Simanovsky; Ran Katz; Shaden Salama; Nurith Hiller |
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Publication Detail:
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Type: Journal Article Date: 2009-11-05 |
Journal Detail:
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Title: European radiology Volume: 20 ISSN: 1432-1084 ISO Abbreviation: Eur Radiol Publication Date: 2010 May |
Date Detail:
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Created Date: 2010-04-07 Completed Date: 2010-07-15 Revised Date: - |
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: 1047-51 Citation Subset: IM |
Affiliation:
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Department of Radiology, Hadassah Mount Scopus - Hebrew University Medical Center, POB 24035, Jerusalem, 91240, Israel. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Acute Disease Adolescent Adult Aged Female Humans Male Middle Aged Radiographic Image Interpretation, Computer-Assisted / methods* Radiography, Abdominal Retrospective Studies Tomography, X-Ray Computed / methods* Ureteral Calculi / radiography* |
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