| Combined magnetic resonance urography and targeted helical CT in patients with renal colic: a new approach to reduce delivered dose. | |
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MedLine Citation:
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PMID: 15269952 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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PURPOSE: To determine whether magnetic resonance urography (MRU), obtained before helical computed tomography (CT) in patients with acute renal colic, can help delimit the obstructed area to be subsequently examined by a targeted CT scan, thus reducing the dose of radiation. MATERIALS AND METHODS: Patients (51) with symptoms of acute renal colic underwent MRU and a total urinary tract helical CT. CT images from the 5 cm below the level of ureteral obstruction as demonstrated by MRU were selected out. Combined interpretation of MRU and selected CT images constituted protocol A. Protocol B consisted of the entire unenhanced helical CT of the urinary tract. The two protocols were compared regarding the following points: 1) sensitivity in diagnosing the presence of obstructing urinary stones, and 2) the delivered radiation dose. RESULTS: Protocol A and protocol B had, respectively, 98% and 100% sensitivity in demonstrating ureteral stone as a cause of renal colic. Estimated average dose calculated from phantom study was 0.52 mSv for protocol A and 2.83 mSv for protocol B. Therefore, the effective radiation dose was 5.4 times lower in protocol A compared to protocol B. CONCLUSION: Combined MRU and short helical CT has a high sensitivity in detecting ureteral calculi with a reduced radiation dose. |
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Authors:
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Alfredo Blandino; Fabio Minutoli; Emanuele Scribano; Sergio Vinci; Carlo Magno; Stefano Pergolizzi; Nicola Settineri; Ignazio Pandolfo; Michele Gaeta |
Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Journal of magnetic resonance imaging : JMRI Volume: 20 ISSN: 1053-1807 ISO Abbreviation: J Magn Reson Imaging Publication Date: 2004 Aug |
Date Detail:
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Created Date: 2004-07-22 Completed Date: 2004-11-23 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9105850 Medline TA: J Magn Reson Imaging Country: United States |
Other Details:
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Languages: eng Pagination: 264-71 Citation Subset: IM |
Copyright Information:
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Copyright 2004 Wiley-Liss, Inc. |
Affiliation:
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Department of Radiologic Sciences, University of Messina, Policlinico G. Martino, Contrada Gazzi, Messina 98125, Italy. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adolescent Adult Aged Female Humans Kidney Calculi / diagnosis*, radiography Magnetic Resonance Imaging* Male Middle Aged Prospective Studies Radiation Dosage Sensitivity and Specificity Tomography, X-Ray Computed* Urography / methods* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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