| MR angiography of intracranial aneurysms: a comparison of 0.5 T and 1.5 T. | |
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MedLine Citation:
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PMID: 9152576 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The objective of this paper is to compare the diagnostic efficacy of 3 DFT time-of-flight MR angiography (MRA) at middle-field-strength and high-field-strength in diagnosis of intracranial aneurysms. Thirty-one patients, including 26 patients with angiographically confirmed intracranial aneurysms (n = 28), underwent MRA at 0.5 and 1.5 T. Images were interpreted by six trained observers who were blinded to diagnosis. Twelve projections of MRA of the circle of Willis, by maximum-intensity projection algorithm, were reviewed using continuous confidence-judgement scales. It was found that MRA at 1.5 T was more sensitive than that at 0.5 T in detection of aneurysms. The sensitivity of six observers ranged between 50 and 64% (mean 56%) at 0.5 T, and between 61 and 86 86% (mean 75%) at 1.5 T. In the smaller aneurysms less than 5 mm, the differences between the units became greater. The sensitivity for small aneurysms ranged from 23 to 54% (mean 32%) at 0.5 T, and from 31 to 69% (mean 58%) at 1.5 T. Our conclusion was that high field strength confers higher accuracy in the detection of intracranial aneurysms with MRA with current-generation MR imagers. |
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Authors:
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Y Korogi; M Takahashi; N Mabuchi; T Watabe; Y Shiokawa; H Shiga; T O'Uchi; T Nakagawa; H Miki; Y Horikawa; S Fujiwara; M Furuse |
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Publication Detail:
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Type: Comparative Study; Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Computerized medical imaging and graphics : the official journal of the Computerized Medical Imaging Society Volume: 21 ISSN: 0895-6111 ISO Abbreviation: Comput Med Imaging Graph Publication Date: 1997 Mar-Apr |
Date Detail:
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Created Date: 1997-07-17 Completed Date: 1997-07-17 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 8806104 Medline TA: Comput Med Imaging Graph Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 111-6 Citation Subset: IM |
Affiliation:
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Department of Radiology, Kumamoto University School of Medicine, Japan. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Algorithms Arteries Basilar Artery / pathology Cerebral Angiography Cerebral Arteries / pathology Choroid Plexus / blood supply Circle of Willis / pathology Humans Image Enhancement / methods Intracranial Aneurysm / diagnosis* Magnetic Resonance Angiography* / methods Observer Variation Ophthalmic Artery / pathology Retrospective Studies Sensitivity and Specificity Single-Blind Method |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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