| Cyclic and radial variation of the echogenicity of blood in human carotid arteries observed by harmonic imaging. | |
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MedLine Citation:
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PMID: 20620699 Owner: NLM Status: In-Process |
Abstract/OtherAbstract:
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To better understand the characteristics of erythrocyte aggregation in flowing blood, echogenicity variation in blood was observed both in vitro and in vivo. However, few noninvasive observations of blood echogenicity variation during the cardiac cycle in human arteries have been reported. In the present study, to reduce the dynamic range between the blood vessel lumen and the surrounding tissue, coded harmonic images were acquired from human carotid arteries using a GE LOGIQ 700 Expert system (GE, Milwaukee, WI, USA) with an M12L probe, which enabled the noninvasive detection of the cyclic and radial variation of echogenicity in arterial vessels. It was found that blood echogenicity increased during systole, reaching a maximum at peak systole and then decreased to a weak level during diastole. The echogenicity profiles of blood along the vessel diameter were found to be approximately parabolic in the cardiac cycle, except for the hypoechoic zone near the center of the vessel at peak systole. The present results for human carotid arteries corroborate previous in vitro observations that showed a cyclic and radial variation of blood echogenicity, which was thought to be caused by the enhancement of erythrocyte aggregation due to the combined effects of flow acceleration and shear rate during systole. |
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Authors:
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Dong-Guk Paeng; Kweon-Ho Nam; K Kirk Shung |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Ultrasound in medicine & biology Volume: 36 ISSN: 1879-291X ISO Abbreviation: Ultrasound Med Biol Publication Date: 2010 Jul |
Date Detail:
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Created Date: 2010-07-12 Completed Date: - 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: 1118-24 Citation Subset: IM |
Copyright Information:
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Copyright 2010 World Federation for Ultrasound in Medicine & Biology. All rights reserved. |
Affiliation:
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Interdisciplinary Postgraduate Program in Biomedical Engineering, Jeju National University, Jeju, Korea. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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