TY - GEN
T1 - Modal analysis of ultrasound radiation force generated shear waves on arteries
AU - Bernal, Miguel
AU - Urban, Matthew W.
AU - Nenadic, Ivan
AU - Greenleaf, James F.
N1 - Copyright:
Copyright 2011 Elsevier B.V., All rights reserved.
PY - 2010
Y1 - 2010
N2 - Arterial elasticity has gained importance in the past few decades as a predictor of cardiovascular diseases and mortality. Measuring the speed of propagation of the pressure wave traveling in the wall of the arteries has been used for a very long time to estimate the mechanical properties of the artery. Two of the major disadvantages of this method are the low temporal resolution (1 sample per second) and the low spatial resolution (carotid-femoral or carotid-radial segments). In our laboratory, we have been working on an ultrasound radiation force-based method to generate high frequency local shear waves, which will allow the study of the mechanical properties of short arterial segments within the heart cycle. In this work we present a modal analysis of the waves generated by our method on an excised pig artery. By doing a twodimensional fast Fourier transform (2D FFT) of the propagating waves, it was possible to differentiate the multiple Lamb-like modes propagating in the wall. These modes showed changes with varying transmural pressure; this was expected as the arterial stiffness increases with pressure. This work shows the feasibility of our method for the study and characterization of propagating modes in the arterial wall. Future studies include developing a Lamb wave model for cylindrical viscoelastic structures to fit our data.
AB - Arterial elasticity has gained importance in the past few decades as a predictor of cardiovascular diseases and mortality. Measuring the speed of propagation of the pressure wave traveling in the wall of the arteries has been used for a very long time to estimate the mechanical properties of the artery. Two of the major disadvantages of this method are the low temporal resolution (1 sample per second) and the low spatial resolution (carotid-femoral or carotid-radial segments). In our laboratory, we have been working on an ultrasound radiation force-based method to generate high frequency local shear waves, which will allow the study of the mechanical properties of short arterial segments within the heart cycle. In this work we present a modal analysis of the waves generated by our method on an excised pig artery. By doing a twodimensional fast Fourier transform (2D FFT) of the propagating waves, it was possible to differentiate the multiple Lamb-like modes propagating in the wall. These modes showed changes with varying transmural pressure; this was expected as the arterial stiffness increases with pressure. This work shows the feasibility of our method for the study and characterization of propagating modes in the arterial wall. Future studies include developing a Lamb wave model for cylindrical viscoelastic structures to fit our data.
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U2 - 10.1109/IEMBS.2010.5626667
DO - 10.1109/IEMBS.2010.5626667
M3 - Conference contribution
C2 - 21096176
AN - SCOPUS:78650808593
SN - 9781424441235
T3 - 2010 Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBC'10
SP - 2585
EP - 2588
BT - 2010 Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBC'10
T2 - 2010 32nd Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBC'10
Y2 - 31 August 2010 through 4 September 2010
ER -