| Multifrequency transducer for microemboli classification and sizing. | |
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MedLine Citation:
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PMID: 16366231 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The classification of circulating microemboli as gaseous or particulate matter is essential to establish the relevance of the detected embolic signals. Until now, Doppler techniques have failed to determine unambiguously the nature of circulating microemboli. Recently, a new approach based on the analysis of radio frequency (RF) signal and using the nonlinear characteristics of gaseous bubbles to classify emboli was investigated. The main limitation of these studies was the requirement of two separate transducers for transmission and reception. This paper presents a multi-frequency transducer with two independent transmitting elements and a separate receiving part with a wide frequency band. The transmitting elements are positioned in a concentric design and cover a frequency band between 100 and 600 kHz. The receiving part consists of a polyvinylidene fluoride layer. The new transducer has been tested in vitro using gaseous emboli. It could correctly classify and size air emboli with diameters ranging from 10 microm to 105 microm. |
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Authors:
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Peggy Palanchon; Ayache Bouakaz; Jan Klein; Nico de Jong |
Publication Detail:
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Type: Evaluation Studies; Journal Article |
Journal Detail:
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Title: IEEE transactions on bio-medical engineering Volume: 52 ISSN: 0018-9294 ISO Abbreviation: IEEE Trans Biomed Eng Publication Date: 2005 Dec |
Date Detail:
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Created Date: 2005-12-21 Completed Date: 2006-01-19 Revised Date: 2009-11-11 |
Medline Journal Info:
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Nlm Unique ID: 0012737 Medline TA: IEEE Trans Biomed Eng Country: United States |
Other Details:
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Languages: eng Pagination: 2087-92 Citation Subset: IM |
Affiliation:
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Department of Cardiology, Thoraxcentre, Erasmus Medical Center Rotterdam, 3000 DR Rotterdam, The Netherlands. p.palanchon@erasmusmc.nl |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Electromagnetic Phenomena
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instrumentation* Embolism, Air / blood*, diagnosis* Equipment Design Equipment Failure Analysis Gases / analysis* Microspheres Particle Size Radio Waves / diagnostic use* Transducers* |
| Chemical | |
Reg. No./Substance:
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0/Gases |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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