Contrast Improvement in Sub- and Ultraharmonic Ultrasound Contrast Imaging by Combining Several Hammerstein Models

Table 1

The parameters of contrast agent.

Resting radius	𝑟0=1.5 μm
Shell thickness	𝑑Se=1.5 nm
Shear modulus	𝐺𝑠=10 MPa
Shear viscosity	𝜂=1.49 Pa⋅s