| Unenhanced MR angiography of the thoracic aorta: initial clinical evaluation. | |
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MedLine Citation:
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PMID: 18356435 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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OBJECTIVE: In patients with difficult i.v. access or renal insufficiency, or in those who are pregnant, we hypothesized than an unenhanced 3D segmented steady-state free precession (SSFP) MR angiography (MRA) technique would be an alternative to contrast-enhanced MR angiography (CE-MRA) for the evaluation of vasculature. MATERIALS AND METHODS: MRA examinations of the thoracic aorta were retrospectively reviewed in 23 patients in whom both CE-MRA and 3D SSFP were performed. CE-MRA was performed using an ECG-gated gradient-echo FLASH sequence. Three-dimensional SSFP MRA was performed during free breathing using a motion-adaptive navigator technique. Quantitative assessment of the 3D SSFP and CE-MRA image sets was performed by comparing the aortic lumen diameter. The quality of the images of the aortic root (scale of 1-5) and the presence of cardiovascular and noncardiovascular pathology were independently determined for both techniques by two reviewers. Bland-Altman and Wilcoxon's signed-rank analyses were performed. RESULTS: The difference in orthogonal measurements of the aortic diameter between those made on images from the 3D SSFP and those made from the CE-MRA sequences was -0.042 cm. The aortic root was better visualized with 3D SSFP: score of 3.78 (of 5) for CE-MRA versus score of 4.65 (of 5) for 3D SSFP (p < 0.05). CONCLUSION: In patients in whom contrast material is contraindicated, unenhanced MRA using a 3D SSFP technique can be performed. |
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Authors:
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Christopher J François; David Tuite; Vibhas Deshpande; Renate Jerecic; Peter Weale; James C Carr |
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Publication Detail:
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Type: Comparative Study; Journal Article |
Journal Detail:
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Title: AJR. American journal of roentgenology Volume: 190 ISSN: 1546-3141 ISO Abbreviation: AJR Am J Roentgenol Publication Date: 2008 Apr |
Date Detail:
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Created Date: 2008-03-21 Completed Date: 2008-05-06 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 7708173 Medline TA: AJR Am J Roentgenol Country: United States |
Other Details:
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Languages: eng Pagination: 902-6 Citation Subset: AIM; IM |
Affiliation:
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Department of Radiology, Northwestern University, Chicago, IL, USA. cfrancois@uwhealth.org |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adolescent Adult Aged Aged, 80 and over Aorta, Thoracic* Aortic Diseases / diagnosis* Electrocardiography Female Humans Image Interpretation, Computer-Assisted Imaging, Three-Dimensional Magnetic Resonance Angiography / methods* Male Middle Aged Retrospective Studies Statistics, Nonparametric |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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