Measurement of viscoelastic properties of tissue-mimicking material using longitudinal wave excitation.
This paper presents an experimental framework for the measurement of the viscoelastic properties of tissue-mimicking material. The novelty of the presented framework is in the use of longitudinal wave excitation and the study of the longitudinal wave patterns in finite media for the measurement of the viscoelastic properties. Ultrasound is used to track the longitudinal motions inside a test block. The viscoelastic parameters of the block are then estimated by 2 methods: a wavelength measurement method and a model fitting method. Connections are also made with shear elastography. The viscoelastic parameters are estimated for several homogeneous phantom blocks. The results from the new methods are compared with the conventional rheometry results.
Baghani
Ali
A
Department of Electrical and Computer Engineering, University of British Columbia, Vancouver, BC, Canada. baghani@ece.ubc.ca
Eskandari
Hani
H
Salcudean
Septimiu
S
Rohling
Robert
R
D000465:Algorithms; D040761:Biomimetic Materials / Q000737:chemistry*; D055119:Elastic Modulus; D005583:Fourier Analysis; D008962:Models, Theoretical; D019047:Phantoms, Imaging; D015203:Reproducibility of Results; D012212:Rheology / Q000379:methods*; D013314:Stress, Mechanical; D014463:Ultrasonography / Q000379:methods*; D055682:Viscoelastic Substances / Q000737:chemistry*; D014783:Viscosity
D055682:Viscoelastic Substances