| Gallstone detection at CT in vitro: effect of peak voltage setting. | |
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MedLine Citation:
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PMID: 17057073 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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This study was a retrospective single-institutional study approved by the Committee on Human Research and was HIPAA compliant. A waiver for informed consent was granted. The purpose of the study was to evaluate the effect of four peak voltage settings on the in vitro conspicuity of gallstones in an anthropomorphic phantom at computed tomography (CT). An anthropomorphic phantom was scanned with (n = 86) or without (n = 85) gallstones at CT by using 80, 100, 120, and 140 kVp. The sensitivity for gallstone detection was significantly higher at 140 kVp (86% [74 of 86] for reader 1 and 81% [70 of 86] for reader 2) than at lower voltage settings (up to 67% [58 of 86] for reader 1 and 63% [54 of 86] for reader 2, P < .05 for each reader), regardless of gallstone size (<1.0 cm vs > or =1.0 cm in diameter, P < .05 for each reader). CT attenuation measurements were not useful for determination of gallstone composition. Abdominal CT performed at 140 kVp may be useful when gallstone disease is of clinical concern. |
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Authors:
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Wesley C Chan; Bonnie N Joe; Fergus V Coakley; Edwin L Prien; Robert G Gould; Sven Prevrhal; William C Barber; Kimberley S Kirkwood; Aliya Qayyum; Benjamin M Yeh |
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Publication Detail:
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Type: Comparative Study; In Vitro; Journal Article |
Journal Detail:
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Title: Radiology Volume: 241 ISSN: 0033-8419 ISO Abbreviation: Radiology Publication Date: 2006 Nov |
Date Detail:
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Created Date: 2006-10-23 Completed Date: 2006-11-30 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0401260 Medline TA: Radiology Country: United States |
Other Details:
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Languages: eng Pagination: 546-53 Citation Subset: AIM; IM |
Affiliation:
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Department of Radiology, University of California San Francisco, 505 Parnassus Ave, San Francisco, CA 94143-0628, USA. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adult Aged Aged, 80 and over Female Gallstones / radiography* Humans Linear Models Male Middle Aged Observer Variation Phantoms, Imaging Radiation Dosage Radiographic Image Interpretation, Computer-Assisted Radiography, Abdominal Retrospective Studies Sensitivity and Specificity Tomography, X-Ray Computed / methods* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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