Document Detail


Effect of collagen on the anisotropy of quasi-longitudinal mode ultrasonic velocity in fibrous soft tissues: a comparison of fixed tendon and fixed myocardium.
MedLine Citation:
PMID:  7963017     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The widespread use of echocardiography has generated considerable interest in the ultrasonic properties of myocardial collagen. This study was designed to investigate the effect of collagen on the propagation of ultrasound by measuring the anisotropy of ultrasonic velocity through formalin fixed specimens of bovine Achilles tendon. Tendon was chosen for this study because it possesses a high content of collagen and a well-defined unidirectional arrangement of fibers. Ultrasonic velocity data were acquired from nine samples of fixed tendon that were each insonified at multiple angles relative to the fibers in 2 degrees increments for a full 360 degrees. Analysis of the data revealed a substantial angular dependence of velocity qualitatively similar to that reported for formalin fixed specimens of normal human myocardium, but approximately 17 times larger in magnitude. Together with measured values of density, these results were used to compute the elastic stiffness coefficients C11 (corresponding to propagation perpendicular to the fibers) and C33 (corresponding to propagation parallel to the fibers) of fixed tendon, yielding 3.08 and 4.51 GPa, respectively.
Authors:
B K Hoffmeister; E D Verdonk; S A Wickline; J G Miller
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Publication Detail:
Type:  Comparative Study; In Vitro; Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  The Journal of the Acoustical Society of America     Volume:  96     ISSN:  0001-4966     ISO Abbreviation:  J. Acoust. Soc. Am.     Publication Date:  1994 Oct 
Date Detail:
Created Date:  1994-12-20     Completed Date:  1994-12-20     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  7503051     Medline TA:  J Acoust Soc Am     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  1957-64     Citation Subset:  IM    
Affiliation:
Department of Physics and School of Medicine, Washington University, St. Louis, Missouri 63130.
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MeSH Terms
Descriptor/Qualifier:
Achilles Tendon / ultrasonography*
Animals
Anisotropy*
Cattle
Collagen / physiology*
Culture Techniques*
Echocardiography*
Muscle Fibers, Skeletal / ultrasonography
Tissue Fixation*
Transducers
Grant Support
ID/Acronym/Agency:
HL40302/HL/NHLBI NIH HHS; HL42950/HL/NHLBI NIH HHS
Chemical
Reg. No./Substance:
9007-34-5/Collagen

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


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