| Preliminary experience using contrast-enhanced MR angiography to assess vertebral artery structure for the follow-up of suspected dissection. | |
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MedLine Citation:
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PMID: 10512235 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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BACKGROUND AND PURPOSE: Important advances have been made recently in MR angiography with the use of contrast medium injection, which has proved valuable for the imaging of vertebral arteries (VAs) obtained during short scanning times. Our purpose was to assess the feasability of contrast-enhanced fast 3D MR angiography for imaging VAs and to evaluate the long-term follow-up of VA dissections. METHODS: Sixteen consecutive patients with 18 angiographically documented VA dissections (seven occlusive dissections and 11 stenotic dissections, including two each with a pseudoaneurysm) were followed up using both contrast-enhanced 3D MR angiography and cervical T1-weighted MR imaging at a median delay of 22 months. Ten patients underwent MR imaging at the acute phase as well, and nine underwent early follow-up angiography at a median delay of 3 months. MR angiographic findings were determined by consensus, focussing on image quality, presence of residual stenosis, luminal irregularities, and occlusion. RESULTS: Of the 32 VAs, a segment of the artery was not assessable on contrast-enhanced MR angiography in each of four small VAs. A central signal void artifact of cervical arteries was seen in one patient and motion artifacts were seen in two, but images could be interpreted. A venous enhancement was detected in 10 of 16 examinations, but this did not prevent image analysis. Ten of 11 stenotic dissections returned to normal, whereas one stenotic dissection progressed to occlusion. Two pseudoaneurysms detected by initial angiography resolved spontaneously; one was revealed only by delayed MR angiography, and one was detected on an early MR angiogram and proved resolved on a late MR angiogram. Of the seven initially occluded VAs, five reopened, with a hairline residual lumen in each of three. CONCLUSION: This preliminary experience showed that contrast-enhanced MR angiography is a promising tool for imaging VAs; it allows the assessment of VA dissection changes over time. Most lesions tended to heal spontaneously, but persisting occlusion or pseudoaneurysm could be detected during the late course. |
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Authors:
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X Leclerc; C Lucas; O Godefroy; L Nicol; A Moretti; D Leys; J P Pruvo |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: AJNR. American journal of neuroradiology Volume: 20 ISSN: 0195-6108 ISO Abbreviation: AJNR Am J Neuroradiol Publication Date: 1999 Sep |
Date Detail:
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Created Date: 1999-11-19 Completed Date: 1999-11-19 Revised Date: 2008-02-14 |
Medline Journal Info:
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Nlm Unique ID: 8003708 Medline TA: AJNR Am J Neuroradiol Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 1482-90 Citation Subset: IM |
Affiliation:
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Department of Neuroradiology, Hôpital Salengro, University Hospital of Lille, France. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adult Aneurysm, Dissecting / diagnosis*, therapy Aneurysm, False / diagnosis Artifacts Contrast Media Feasibility Studies Female Follow-Up Studies Gadolinium DTPA / diagnostic use Humans Image Enhancement* Image Processing, Computer-Assisted* Intracranial Aneurysm / diagnosis*, therapy Magnetic Resonance Angiography* Male Middle Aged Sensitivity and Specificity Treatment Outcome Vertebral Artery* / pathology Vertebrobasilar Insufficiency / diagnosis*, therapy |
| Chemical | |
Reg. No./Substance:
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0/Contrast Media; 122795-43-1/gadodiamide; 80529-93-7/Gadolinium DTPA |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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