Table 1.
Material | Density, kg/m3 | Sound speed, m/s | Volumetric heat capacity, J/C/m3 | Non-linearity | Attenuation*, Np/cm |
---|---|---|---|---|---|
PA gel | 1044 | 1544 | 4460 × 103 | 3.5 | 0.01–0.019 |
Bovine liver | 1050 | 1580 | 3540 × 103 | 4.1 | 0.043–0.097 |
Bovine heart | 1060 | 1570 | 3940 × 103 | 4.1 | 0.06–0.114 |
PA = polyacrylamide; HIFU = high-intensity focused ultrasound.
Attenuation is given for the frequency range of 1–1.9 MHz (Duck 1990; Khokhlova et al. 2011; Lafon et al. 2005).