Method and Apparatus for Detecting Viscoelastic Parameters of Viscoelastic Media

摘要

A method and apparatus for detecting viscoelastic parameters in a viscoelastic medium, the method comprising: applying a mechanical vibration of a single predetermined frequency to a viscoelastic medium and producing a shear wave in a viscoelastic medium (101); Emitting ultrasound to a viscoelastic medium and receiving an ultrasound echo signal (102); (103) obtaining maximum displacement data at respective depths of the shear waves according to the ultrasonic echo signals, wherein each maximum displacement data indicates a maximum vibration amplitude of the shear waves when the shear waves propagate at different depths in the viscoelastic medium; Fitting each maximum displacement data and obtaining a maximum displacement attenuation curve (104); And determining 105 the viscoelastic parameter of the viscoelastic medium according to the maximum displacement attenuation curve. By this, it is possible to obtain viscoelastic parameters which are also related to elasticity and viscosity as well, to improve the measurement dimension for tissue, to provide more abundant tissue parameter information and measurement dimension, and to provide more accurate tissue fibrosis measurement results .