| Progress in the use of helical CT for imaging urinary calculi. | |
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MedLine Citation:
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PMID: 15801357 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Helical CT has become the preferred method to diagnose urinary calculi in patients presenting with abdominal or flank pain. Recent in vitro studies have shown that CT also can display the internal structure in stones with remarkable detail. Because some stones respond better to SWL than others, knowing stone structure at diagnosis could be helpful in choosing among treatment options. This paper examines the potential for CT to be used in this way. Older CT technology proved to be problematic, in that all studies using low-resolution CT will suffer from an artifact in which stone size affects apparent CT attenuation values. Thus, the observation that stones with low measured CT attenuation break more easily than stones with high attenuation could be attributable entirely to an artifact of stone size. Most stones are composed of more than one mineral, and heterogeneity of composition may contribute to variability in stone response to SWL. Older technology is not useful in evaluating stone composition, but current and emerging CT machines have sufficient resolution to determine the composition and structure of stones inside the patient, provided proper viewing windows are used. Continuing improvement in image resolution in helical CT promises to provide information about stone composition and structure that will ultimately lead to better care for patients with stone disease. |
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Authors:
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James C Williams; Samuel C Kim; Chad A Zarse; James A McAteer; James E Lingeman |
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Publication Detail:
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Type: Journal Article; Research Support, N.I.H., Extramural; Research Support, U.S. Gov't, P.H.S.; Review |
Journal Detail:
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Title: Journal of endourology / Endourological Society Volume: 18 ISSN: 0892-7790 ISO Abbreviation: J. Endourol. Publication Date: 2004 Dec |
Date Detail:
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Created Date: 2005-04-01 Completed Date: 2005-06-23 Revised Date: 2007-11-14 |
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: 937-41 Citation Subset: IM |
Affiliation:
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Department of Anatomy and Cell Biology, Indiana University School of Medicine, Indianapolis, Indiana 46202-5120, USA. williams@anatomy.iupui.edu |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Artifacts Humans Lithotripsy Tomography, Spiral Computed* Urinary Calculi / physiopathology, radiography*, therapy |
| Grant Support | |
ID/Acronym/Agency:
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P01 DK43881/DK/NIDDK NIH HHS |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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