| Intracranial aneurysms and vascular malformations: comparison of time-of-flight and phase-contrast MR angiography. | |
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MedLine Citation:
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PMID: 1947088 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Twenty-seven patients with 14 aneurysms and 17 vascular malformations were each examined with both time-of-flight (TF) and phase-contrast (PC) magnetic resonance angiography of the head. Three-dimensional (3D) PC imaging depicted the patent lumen of the aneurysms, while 3D TF imaging depicted the patent lumen and a subacute thrombus if present. The 3D PC techniques were superior to 3D TF methods in depicting aneurysms larger than 15 mm. PC angiography allowed velocity resolution of vascular lesions and yielded functional flow information by directly depicting collateral flow to vascular lesions. Artifacts present on TF images were due to substances with short T1, hemosiderin, and surgical clips. Artifacts present on PC images were due to flow-related aliasing. The results showed that PC techniques have specific advantages over TF techniques, including identification of large aneurysms, velocity resolution of vascular lesions, depiction of flow direction about the circle of Willis, and less degradation by artifacts. |
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Authors:
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J Huston; D A Rufenacht; R L Ehman; D O Wiebers |
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Publication Detail:
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Type: Comparative Study; Journal Article |
Journal Detail:
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Title: Radiology Volume: 181 ISSN: 0033-8419 ISO Abbreviation: Radiology Publication Date: 1991 Dec |
Date Detail:
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Created Date: 1991-12-18 Completed Date: 1991-12-18 Revised Date: 2006-11-15 |
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: 721-30 Citation Subset: AIM; IM |
Affiliation:
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Department of Diagnostic Radiology, Mayo Clinic, Rochester, MN 55905. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Adult Aged Cerebral Arteries / pathology Female Humans Intracranial Aneurysm / diagnosis* Intracranial Arteriovenous Malformations / diagnosis* Magnetic Resonance Imaging / methods* Male Middle Aged |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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