【摘要】 本文根据组织结构的特点,对Chivers的组织超声散射模型作了修正。提出了组织的弹性模量起伏的尺度是有统计分布的假设,从而导出反向散射系数与频率的关系,可以解释大多数软组织的实测结果。同时,对模型中的统计参量与组织结构的关系作了初步讨论。更多还原

【Abstract】 A modified model of ultrasound scattering, based on the structure of biological tissues, has been derived which assumes that the scale of elastic modulus fluctuation of tissues is statistically distributed. The result explains the observed variation of the backscattering coefficient with frequency for a number of tissues. A crude discussion about the relationship between the statistical parameters and the tissue structure is also provided.更多还原