| Image analysis in time-resolved large field of view 3D MR-angiography at 3T. | |
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MedLine Citation:
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PMID: 18972352 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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PURPOSE: To qualitatively and quantitatively evaluate the image quality in accelerated time-resolved 3D contrast-enhanced MR angiography (tr-CE-MRA) at 3T. MATERIALS AND METHODS: In all, 113 MRA were performed in 107 patients on a 3T MR system after written informed consent and approval by the ethics committee. Twenty consecutive thoracic (n=87) or craniocervical (n=26) 3D data volumes were acquired. The timeframes with maximum arterial and venous contrast were determined and a total of 663 arterial and venous segments were analyzed by two blinded observers. Diagnostic image quality was graded by applying a 0 (low) to 3 (excellent) scale. Additionally, local signal-to-noise (SNR) and contrast-to-noise ratios (relative CNR) were evaluated. RESULTS: Tr-CE-MRA was successfully performed in all patients. Good to excellent image quality (2.42+/-0.31) was observed in all individuals with preserved discrimination of arteries (2.43+/-0.48) and veins (2.20+/-0.56). Minor image degradation due to artifacts (2.62+/-0.25) and constantly high vascular signal and contrast were detected. There was a significant superiority of coronal orientation during thoracic MRA (P<0.05). In 18 cases tr-CE-MRA provided additional information on vascular pathologies. CONCLUSION: Large field of view tr-CE-MRA enables constantly high-quality thoracic and craniocervical angiographies. In addition, the dynamics of tr-CE-MRA can offer additional information on vascular pathologies. |
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Authors:
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Alex Frydrychowicz; Thorsten A Bley; Zahra Abdullah Zadeh; Andreas Harloff; Jan T Winterer; Jürgen Hennig; Mathias Langer; Michael Markl |
Publication Detail:
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Type: Evaluation Studies; Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Journal of magnetic resonance imaging : JMRI Volume: 28 ISSN: 1053-1807 ISO Abbreviation: J Magn Reson Imaging Publication Date: 2008 Nov |
Date Detail:
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Created Date: 2008-11-03 Completed Date: 2009-01-22 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9105850 Medline TA: J Magn Reson Imaging Country: United States |
Other Details:
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Languages: eng Pagination: 1116-24 Citation Subset: IM |
Copyright Information:
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Copyright (c) 2008 Wiley-Liss, Inc. |
Affiliation:
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Department of Diagnostic Radiology and Medical Physics, University Hospital Freiburg, Germany. alex.frydrychowicz@uniklinik-freiburg.de |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adolescent Adult Aged Aged, 80 and over Algorithms* Cerebral Angiography / methods* Female Humans Image Enhancement / methods* Image Interpretation, Computer-Assisted / methods* Imaging, Three-Dimensional / methods* Magnetic Resonance Angiography / methods* Male Middle Aged Reproducibility of Results Sensitivity and Specificity Thoracic Arteries / pathology* Young Adult |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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