| Comparison of Magnetic Resonance Angiography Scans on 1.5, 3, and 7 Tesla Units: A Quantitative Study of 3-Dimensional Cerebrovasculature. | |
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MedLine Citation:
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PMID: 21447031 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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BACKGROUND: Although multiple studies demonstrate benefits of high field imaging of cerebrovasculature, a detailed quantitative analysis of complete cerebrovascular system is unavailable. To compare quality of MR angiography (MRA) acquisitions at various field strengths, we used 3-dimensional (3D) geometric cerebrovascular models extracted from 1.5T/3T/7T scans. METHODS: The 3D cerebrovascular models were compared in volume, length, and number of branches. A relationship between the vascular length and volume was statistically derived. Acquisition performance was benchmarked against the maximum volume at infinitive length. RESULTS: The numbers of vessels discernible on 1.5T/3T/7T are 138/363/907. 3T shows 3.3(1.9) and 7T 1.2(9.1) times more arteries (veins) than 1.5T. The vascular lengths and volumes at 1.5T/3T/7T are 3.7/12.5/22.7 m and 15.8/26.6/28.0 cm(3) . For arteries: 3T-1.5T gain is very high in length, high in volume; 7T-3T gain is medium in length, small in volume. For veins: 3T-1.5T gain is moderate in length, high in volume; 7T-3T gain is very high in length, moderate in volume. 1.5T shows merely half of vascular volume. At 3T 6%, while at 7T only 1% of vascular volume is missing. CONCLUSION: Our approach differs from standard approaches based on visual assessment and signal (contrast)-to-noise ratio. It also measures absolute acquisition performance, provides a unique length-volume relationship, and predicts length/volume for intermediate teslages. |
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Authors:
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Wieslaw L Nowinski; Fiftarina Puspitasaari; Ihar Volkau; Yevgen Marchenko; Michael V Knopp |
Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-3-29 |
Journal Detail:
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Title: Journal of neuroimaging : official journal of the American Society of Neuroimaging Volume: - ISSN: 1552-6569 ISO Abbreviation: - Publication Date: 2011 Mar |
Date Detail:
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Created Date: 2011-3-30 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9102705 Medline TA: J Neuroimaging Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Copyright Information:
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© 2011 by the American Society of Neuroimaging. |
Affiliation:
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Biomedical Imaging Lab, Agency for Science Technology and Research, Singapore (WLN, FP, IV, YM); Department of Radiology, Wright Center of Innovation, The Ohio State University, OH (MVK). |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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