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elastography
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Analyzing Harmonic wave Propagation in Two Layered Elastic Anisotropic Prestressed Plate
, M.Sc. Thesis Sharif University of Technology ; Fallah Rajabzadeh, Famida (Supervisor)
Abstract
Obtaining the mechanical properties of body tissues in a non-destructive manner is clinically important and has wide applications in the diagnosis and prevention of diseases. one of non-destructive methods is elastography, which requires proper modeling of the tissue and then analysis of the wave propagation in it and obtaining the propagation relations and the dispersion curves. Study of the literature revealed that many simplifications have been used in most modelings of arteries and so far the anisotropy of the artery and its layers with the effects of surrounding tissues and blood have not been studied Therefore, the aim of this study is to model the artery as a two-layer orthotropic...
Inverse Identification of Elastic Constants of Thin Hyper-Elastic Isotropic Plates using the Dispersion Curve and Neural Network
, M.Sc. Thesis Sharif University of Technology ; Fallah Rajabzadeh, Famida (Supervisor)
Abstract
Non-destructive methods using ultrasound waves, including elastography, have gained special attention in recent years for determining the mechanical and geometric properties of materials. Due to the hyperelastic nature of body tissues, this research aims to determine the mechanical and geometric properties (thickness) of a hyperelastic plate immersed in fluid, considered as a simplified model of arteries. In this study, the mechanical and geometric properties (thickness) of an incompressible, isotropic, single-layer hyperelastic plate are investigated through an inverse method based on a neural network using the wave dispersion curve. To this end, the wave propagation equations in...