生物组织超声散射系数与温度相关性的研究

Research on Correlation between Biological Tissue Ultrasonic Scattering Coefficient and Temperature

在随机起伏介质超声散射理论基础上,根据生物非均匀介质中声波动方程,推导出散射系数与温度的关系,然后分别采用了回波直接截取、经验模态分层(EDM)两种方法进行实验验证分析。结果表明超声散射系数与温度有依次递增的对应关系,可以运用它从超声回波信号中有效地提取组织温度信息。经验模态分层法的数据处理结果一致性要好些,总体趋势更接近理论分析。

On the basis of random fluctuation medium ultrasonic scattering theory, according to acoustic wave equation in biological non-homogeneous medium, the relationship between scattering coefficient and temperature is deduced, and then were respectively adopt two kinds of methods - direct interception echo and the EMD layered to analyze the experi- mental data. The results showed that ultrasonic scattering coefficient increases with the temperature, and it can be used to effectively obtain tissue temperature information in tissue from the ultrasonic echo signal. The results in the EMD expe- rience modal data of the layered method are better consistency, which overall trend is more close to the theoretical analy- sis.