Spectral parameters – determined directly from the signal spectrum in the frequency range corresponding to the transducer frequency band | Mid-band fit (MBF) [dB] | Size, shape, quantity, and elastic properties of scatterers |
0-MHz intercept (SI) [dB]: | Size, shape, quantity, and elastic properties of scatterers |
Spectral slope (SS) [dB/MHz]: | Size, shape of scatterers |
Backscatter scattering parameters – determined on the basis of the backscattering coefficient in the frequency range corresponding to the transducer frequency band | Average scatterer diameter (ASD) [μm] | Average size of the scatterers (e.g., single cells or clusters of cells) |
Average acoustic concentration (AAC) [dB/cm3] | Spatial density, organization, elastic properties of scatterers |
Integrated backscatter coefficient (IBC) [dB] | Size (AND), shape, quantity, organization, and elastic properties of scatterers |
Statistical properties |
First-order statistical properties of the RF echo envelope – basic concept relies on modeling the magnitude of speckle with probability density functions, shape parameters of the K homodyne distribution | ENS – effective numbers of scatterers the scatterer clustering parameter | Quantity, organization, and elastic properties of scatterers |
k– the structure parameter | Size, elastic properties of diffusing structures |