Acoustic Radiation Force Creep-Recovery and Shear Wave Propagation Method for Elasticity Imaging

Technology #2012-129

A method to quantify tissue viscoelastic properties in a model-independent way by estimating the complex shear modulus from creep-recovery response and shear wave propagation speed by ultrasound acoustic radiation force. This method uses a formula that converts creep-recovery response in time to frequency domain complex modulus. The shear wave speed is used to calibrate the complex modulus so that the knowledge of the applied radiation force magnitude is not necessary. This novel method provides a non-invasive, fast, robust and local measure of tissue viscoelastic properties without a rheological model.