Thijssen J M
Biophysics Laboratory, Institute of Ophthalmology, University Hospital and Medical School, Nijmegen, The Netherlands.
Phys Med Biol. 1989 Nov;34(11):1667-74. doi: 10.1088/0031-9155/34/11/013.
Acoustic models of soft biological tissues are discussed. The methods to derive acoustic bulk parameters, i.e. attenuation coefficient and backscattering coefficient are outlined. When applying a specific backscattering model the effective dimension of the scattering sites within a tissue can be estimated. The texture of echographic images is defined in terms of speckle and it is discussed in which way the texture is influenced by the beam formation and the volume density of the scatterers. Structural characteristics of tissues are discussed and the method to estimate a structural dimension is indicated. Recent developments are parametric imaging and image processing.
讨论了软生物组织的声学模型。概述了推导声学体积参数（即衰减系数和后向散射系数）的方法。当应用特定的后向散射模型时，可以估计组织内散射位点的有效尺寸。超声图像的纹理是根据散斑定义的，并讨论了纹理受波束形成和散射体体积密度影响的方式。讨论了组织的结构特征，并指出了估计结构尺寸的方法。最近的发展是参数成像和图像处理。
