超声弹性成像技术中一种新的组织压缩仿真模型

A New Tissue Compression Simulation Model in Ultrasonic Elastography

组织压缩仿真模型在超声弹性成像技术中,对应变估计与成像算法的设计和性能评估起着非常重要的作用。基于组织超声分立散射模型,提出一种新的组织压缩仿真模型。该模型通过设计信号幅度和相位参数的不同变化,可以实现压缩前后信号可控的解相关性。与其他仿真模型相比,该模型还具有解相关性随检测深度变化的特点。离体组织压缩实验验证了该模型的有效性。

Tissue compression simulation model is important to design and evaluate strain estimating and imaging algorithm in ultrasonic elastography. A new tissue compression simulation model was present based on the separate scattering model of biological tissues. By changing amplitude and phase of the simulated signal, controllable decorrelation between the pre-and post-compression signals can be practiced. Moreover, the controllable decorrelation can change with the examined tissue depth when compared to the other simulation models in elastography. The validity of the model was examined by tissue compression experiments in-vitro.