We investigated the differences between the transmission (Tx)/reception (Rx) sound fields for target and reference signals using a reference phantom method (RPM) to assess the stability of backscattering coefficient (BSC) evaluation. A clinical ultrasound scanner and two types of phased linear array transducer with low and high frequencies were used to evaluate the BSCs for two types of homogenous phantom with different attenuation coefficients and BSCs. Different Tx/Rx sound fields were reproduced using different combinations of Tx focus depths and aperture sizes. Target signals with Tx conditions that were both the same as and different from those for the reference signals were used to produce signals with different Tx/Rx sound fields. The differences in the Tx/Rx sound fields affected the depth dependence of the evaluated BSC. It was concluded that this can be a factor creating variation in the BSC for homogenous targets.

我们使用参考幻像方法 (RPM) 研究了目标信号和参考信号的传输 (Tx)/接收 (Rx) 声场之间的差异，以评估反向散射系数 (BSC) 评估的稳定性。使用临床超声扫描仪和低频和高频两种类型的相控线阵换能器来评估两种具有不同衰减系数和 BSC 的同质体模的 BSC。不同的 Tx/Rx 声场使用不同的 Tx 聚焦深度和孔径大小组合再现。具有与参考信号相同和不同的 Tx 条件的目标信号用于产生具有不同 Tx/Rx 声场的信号。Tx/Rx 声场的差异影响评估的 BSC 的深度依赖性。