| Comparison of 1.5 and 3.0 T for Contrast-Enhanced Pulmonary Magnetic Resonance Angiography. | |
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MedLine Citation:
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PMID: 21993980 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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Objective: In a recent multi-center trial of gadolinium contrast-enhanced magnetic resonance angiography (Gd-MRA) for diagnosis of acute pulmonary embolism (PE), two centers utilized a common MRI platform though at different field strengths (1.5T and 3T) and realized a signal-to-noise gain with the 3T platform. This retrospective analysis investigates this gain in signal-to-noise of pulmonary vascular targets. Methods: Thirty consecutive pulmonary MRA examinations acquired on a 1.5T system at one institution were compared to 30 consecutive pulmonary MRA examinations acquired on a 3T system at a different institution. Both systems were from the same MRI manufacturer and both used the same Gd-MRA pulse sequence, although there were some protocol adjustments made due to field strength differences. Region-of-interests were manually defined on the main pulmonary artery, 4 pulmonary veins, thoracic aorta, and background lung for objective measurement of signal-to-noise, contrast-to-noise, and bolus timing bias between centers. Results: The 3T pulmonary MRA protocol achieved higher spatial resolution yet maintained significantly higher signal-to-noise ratio (≥13%, p = 0.03) in the main pulmonary vessels relative to 1.5T. There was no evidence of operator bias in bolus timing or patient hemodynamic differences between groups. Conclusion: Relative to 1.5T, higher spatial resolution Gd-MRA can be achieved at 3T with a sustained or greater signal-to-noise ratio of enhanced vasculature. |
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Authors:
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Frank Joseph Londy; Suzan Lowe; Paul D Stein; John G Weg; Robert L Eisner; Kenneth V Leeper; Pamela K Woodard; H Dirk Sostman; Kathleen A Jablonski; Sarah E Fowler; Charles A Hales; Russell D Hull; Alexander Gottschalk; David P Naidich; Thomas L Chenevert |
Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-10-12 |
Journal Detail:
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Title: Clinical and applied thrombosis/hemostasis : official journal of the International Academy of Clinical and Applied Thrombosis/Hemostasis Volume: - ISSN: 1938-2723 ISO Abbreviation: - Publication Date: 2011 Oct |
Date Detail:
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Created Date: 2011-10-13 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9508125 Medline TA: Clin Appl Thromb Hemost Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Affiliation:
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Department of Radiology, University of Michigan, Ann Arbor, MI, USA. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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