| Detection of renal calculi on late arterial phase computed tomography images: are noncontrast scans always needed to detect renal calculi? | |
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MedLine Citation:
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PMID: 19204444 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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OBJECTIVE: Renal calculi are sometimes incidentally detected on contrast-enhanced computed tomography (CT) scans. The purpose of this study was to evaluate the detectability of renal calculi on arterial phase CT. METHODS: One hundred thirty-three kidneys of 67 consecutive patients (one had prior unilateral nephrectomy) who underwent multidetector CT including noncontrast and arterial phase (acquired at 25 seconds from the start of 120 mL of intravenous contrast injection at a rate of 3 mL/s) scans were retrospectively evaluated. The detectability of renal calculi was determined by comparison of the noncontrast and contrast-enhanced scans. RESULTS: Sixty-three calculi in 25 kidneys were detected in 17 patients on noncontrast CT. Forty-seven (75%) of the 63 calculi were also detected on the arterial phase scans. The size and highest attenuation of calculi (measured on noncontrast CT) detected on arterial phase scans were 4.3 +/- 3.0 mm and 556 +/- 353 Hounsfield units, and those detected only on noncontrast CT were 2.8 +/- 0.8 mm (P = 0.053) and 181 +/- 47 Hounsfield units (P < 0.0001), respectively. All calculi larger than 5 mm were detected on arterial phase scans. CONCLUSIONS: On arterial phase scans, 75% of the renal calculi and allrenal calculi larger than 5 mm were detected; the attenuation of the calculi had a significant correlation to detectability. |
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Authors:
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Satomi Kawamoto; Karen M Horton; Elliot K Fishman |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Journal of computer assisted tomography Volume: 32 ISSN: 1532-3145 ISO Abbreviation: J Comput Assist Tomogr Publication Date: 2008 Nov-Dec |
Date Detail:
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Created Date: 2009-02-10 Completed Date: 2009-03-16 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 7703942 Medline TA: J Comput Assist Tomogr Country: United States |
Other Details:
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Languages: eng Pagination: 859-64 Citation Subset: IM |
Affiliation:
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Russell H. Morgan Department of Radiology and Radiological Science, Johns Hopkins Hospital, Baltimore, MD 21287, USA. skawamo1@jhmi.edu |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adult Aged Aged, 80 and over Contrast Media Female Humans Kidney Calculi / radiography* Male Middle Aged Radiographic Image Enhancement / methods* Renal Artery / radiography Reproducibility of Results Sensitivity and Specificity Tomography, X-Ray Computed / methods* |
| Chemical | |
Reg. No./Substance:
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0/Contrast Media |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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