| A new echocardiographic method for identifying vortex flow in the left ventricle: numerical validation. | |
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MedLine Citation:
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PMID: 20381947 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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A new mathematical method for estimating velocity vectors from color Doppler datasets is proposed to image blood flow dynamics; this method has been called echodynamography or vector flow mapping (VFM). In this method, the concept of stream function is exploited to expand a 2-D distribution of radial velocities in polar coordinates, observed with color Doppler, to a 2-D distribution of velocity vectors. This study was designed to validate VFM using 3-D numerical flow models. Velocity fields were reconstructed from the virtual color Doppler datasets derived from the models. VFM captured the gross features of flow structures and produced comparable images of the distribution of vorticity, which correlated significantly with the original field (for velocity magnitudes, standard error of estimate = 0.003 to 0.007 m/s; for vorticity, standard error of estimate = 0.35 to 2.01/s). VFM may be sensitive for depicting flow structures derived from color Doppler velocities with reasonable accuracy. |
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Authors:
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Tokuhisa Uejima; Akira Koike; Hitoshi Sawada; Tadanori Aizawa; Shigeo Ohtsuki; Motonao Tanaka; Tetsushi Furukawa; Alan G Fraser |
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Publication Detail:
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Type: Evaluation Studies; Journal Article; Validation Studies Date: 2010-04-09 |
Journal Detail:
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Title: Ultrasound in medicine & biology Volume: 36 ISSN: 1879-291X ISO Abbreviation: Ultrasound Med Biol Publication Date: 2010 May |
Date Detail:
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Created Date: 2010-04-27 Completed Date: 2010-08-05 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0410553 Medline TA: Ultrasound Med Biol Country: England |
Other Details:
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Languages: eng Pagination: 772-88 Citation Subset: IM |
Copyright Information:
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Copyright 2010 World Federation for Ultrasound in Medicine & Biology. Published by Elsevier Inc. All rights reserved. |
Affiliation:
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Department of Cardiology, the Cardiovascular Institute, Tokyo, Japan. t.uejima@nifty.ne.jp |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Algorithms* Blood Flow Velocity / physiology Computer Simulation Coronary Circulation / physiology* Echocardiography / methods* Heart Ventricles / ultrasonography* Humans Image Interpretation, Computer-Assisted / methods* Models, Cardiovascular Reproducibility of Results Sensitivity and Specificity Ventricular Function, Left / physiology* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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