P0 0.25[MPa] "源压力幅值"
f0 1[MHz] "源频率"
omega0 2*pi*f0 "源角频率"
T0 1/f0 "源周期"
alpha_water 0.025[1/m] "1 MHz 水的吸声系数"
alpha_tissue 8.55[1/m] "1 MHz 组织体模的吸声系数"
c_water 1484[m/s] "水中的声速"
c_tissue 1568[m/s] "组织体模中的声速"
rho_water 1000[kg/m^3] "水的密度"
rho_tissue 1044[kg/m^3] "组织体模的密度"
BA_water 5.2 "水的非线性参数"
BA_tissue 7.4 "水的非线性参数"
delta_water 2*alpha_water*c_water^3/omega0^2 "水的声扩散系数"
delta_tissue 2*alpha_tissue*c_tissue^3/omega0^2 "组织体模的声扩散系数"
F 60[mm] "焦距"
r_source 62.64[mm] "透镜半径"
w_source 35[mm] "透镜光圈"
z_tissue 24.6[mm] "组织体模的起始位置"
h_model 95.1[mm] "模型总高度"
r_model 43.6[mm] "模型总半径"
th_abs 5[mm] "吸收层厚度"