Table 3.
Stromal backscatter parameters and 95% confidence bounds as a function of medium concentration.
| Slope (dB/MHz) | Midband Fit (dB) | Attenuation Coefficient (dB/cm-MHz) | |||
|---|---|---|---|---|---|
| Medium Concentration (%) | Unadjusted | Attenuation- Compensated | Unadjusted | Attenuation-Compensated | |
| 100 | -0.119 ± 0.021 | -0.033 ± 0.073 | -60.0 ± 0.8 | -57.0 ± 0.9 | 0.927 ± 0.434 |
| 75 | -0.086 ± 0.013 | -0.032 ± 0.027 | -60.7 ± 1.2 | -58.8 ± 0.9 | 0.585 ± 0.389 |
| 50 | -0.077 ± 0.013 | -0.059 ± 0.021 | -59.6 ± 0.8 | -59.0 ± 0.7 | 0.225 ± 0.273 |
| 25 | -0.060 ± 0.022 | -0.026 ± 0.024 | -58.1 ± 1.2 | -56.9 ± 1.2 | 0.342 ± 0.363 |
| 0 | -0.005 ± 0.030 | -0.011 ± 0.026 | -52.5 ± 3.5 | -52.6 ± 5.3 | 0.010 ± 0.581 |