Shear-Modulus Estimation by Application of Spatially Modulated Impulse Acoustic Radiation Force Approximation
AssigneeUniversity of Rochester
InventorStephen McAleavey
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Abstract
A method for determining a shear modulus of an elastic material with a known density value is provided. In this method, a spatially modulated acoustic radiation force is used to initially generate a disturbance of known spatial frequency or wavelength. The propagation of this initial displacement as a shear wave is measured using ultrasound tracking methods. A temporal frequency is determined based on the shear wave. The shear modulus of the elastic material at the point of excitation may be calculated using the values of the spatial wavelength, material density, and temporal frequency.
Claims5
A method for determining a speed of a shear wave in a material, comprising the steps of:
- applying a disturbance having a known wavelength to the material to cause a shear wave to be produced in the material;
- measuring a temporal frequency of the shear wave;
- and
- calculating the speed of the shear wave by using the measured temporal frequency of the shear wave and the known wavelength of the disturbance.
Dependencies are inferred from the claim text.