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颈动脉超声仿真有助于血管壁超声检测及信号处理方法的性能评价。提出三层膜管壁结构的颈动脉超声仿真方法。根据组织散射点分布的形状和密度与超声回声斑点分布的变化规律,对临床图像统计分析,确定对应组织散射点分布、密度及强度等特征参数,利用FIELDⅡ产生超声射频回波信号并得到B超图像。30例仿真试验结果表明,血管壁内、中、外膜及血流回声的统计分布与临床B超图像的一致;与中心频率为8 MHz的结果相比,12 MHz仿真的内、中、外膜厚度及管腔直径测量均值与预设值相等,最大相对误差分别为4.01%,1.25%,0.04%及0.15%,仿真效果更为逼真。
Carotid ultrasound simulation is helpful to the performance of vascular wall ultrasound detection and signal processing methods. Proposed a three-layer membrane structure of the carotid artery ultrasound simulation. According to the distribution of the shape and density of the scatter point of the tissue and the change rule of the echogenicity of the echogenicity, the statistical analysis of the clinical images was carried out to determine the characteristic parameters such as the distribution, density and intensity of the scattering points of the corresponding tissue. image. The simulation results of 30 cases showed that the statistical distribution of the inner, middle, adventitia and echo of the blood vessels was consistent with the clinical B-ultrasound images. Compared with the result of 8 MHz center frequency, Membrane thickness and lumen diameter measurement mean value is equal to the preset value, the maximum relative error is 4.01%, 1.25%, 0.04% and 0.15% respectively. The simulation effect is more realistic.