Document Detail

Material property estimation for tubes and arteries using ultrasound radiation force and analysis of propagating modes.
MedLine Citation:
PMID:  21428498     Owner:  NLM     Status:  MEDLINE    
Arterial elasticity has been proposed as an independent predictor of cardiovascular diseases and mortality. Identification of the different propagating modes in thin shells can be used to characterize the elastic properties. Ultrasound radiation force was used to generate local mechanical waves in the wall of a urethane tube or an excised pig carotid artery. The waves were tracked using pulse-echo ultrasound. A modal analysis using two-dimensional discrete fast Fourier transform was performed on the time-space signal. This allowed the visualization of different modes of propagation and characterization of dispersion curves for both structures. The urethane tube/artery was mounted in a metallic frame, embedded in tissue-mimicking gelatin, cannulated, and pressurized over a range of 10-100 mmHg. The k-space and the dispersion curves of the urethane tube showed one mode of propagation, with no effect of transmural pressure. Fitting of a Lamb wave model estimated Young's modulus in the urethane tube around 560 kPa. Young's modulus of the artery ranged from 72 to 134 kPa at 10 and 100 mmHg, respectively. The changes observed in the artery dispersion curves suggest that this methodology of exciting mechanical waves and characterizing the modes of propagation has potential for studying arterial elasticity.
Miguel Bernal; Ivan Nenadic; Matthew W Urban; James F Greenleaf
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Publication Detail:
Type:  Journal Article; Research Support, N.I.H., Extramural    
Journal Detail:
Title:  The Journal of the Acoustical Society of America     Volume:  129     ISSN:  1520-8524     ISO Abbreviation:  J. Acoust. Soc. Am.     Publication Date:  2011 Mar 
Date Detail:
Created Date:  2011-03-24     Completed Date:  2011-07-07     Revised Date:  2014-09-15    
Medline Journal Info:
Nlm Unique ID:  7503051     Medline TA:  J Acoust Soc Am     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1344-54     Citation Subset:  IM    
Copyright Information:
© 2011 Acoustical Society of America
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MeSH Terms
Blood Pressure
Carotid Arteries / ultrasonography*
Elastic Modulus
Elasticity Imaging Techniques / instrumentation,  methods*
Fourier Analysis
Image Interpretation, Computer-Assisted*
Models, Cardiovascular
Phantoms, Imaging
Pulsatile Flow
Time Factors
Grant Support
Reg. No./Substance:
3IN71E75Z5/Urethane; 9000-70-8/Gelatin

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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