超声彩色血流成像的计算机快速仿真方法

A Fast Computer Simulation Method for Ultrasound Color Flow Imaging

研究超声彩色血流成像的快速仿真方法,克服原先仿真方法非常耗时的缺点。方法超声彩色血流成像计算机仿真中,血流信号是对成像区间内所有点散射体的回波信号累加而得到的。通过引入新的等效散射体模型,可以大大降低散射体的密度,从而减少计算回波信号所需时间。在计算机上用Matlab编程来进行仿真实验,对以往仿真方法和基于等效散射体模型方法的性能进行比较。结果实验表明:基于等效散射体模型的仿真,在保证相同流速精度的前提下,仿真速度比传统方法提高了10倍以上。结论基于等效散射体模型的仿真方法能极大地提高超声彩色血流成像的仿真速度,可以为超声彩色血流成像的方法研究提供便利。

Objective To investigate the fast computer simulation method for the ultrasound color flow imaging, and overcome the defect of the time cost of the original simulation methods. Methods In the computer simulation of the ultrasound color flow imaging, flow signals are obtained by accumulating all the echo signals of scatterers in the imaging area. With the novel equivalent scatterers model, the scatterers density can be reduced greatly-leading to the decrease of the computing time of echo signals. On a personal computer, simulation experiments are realized using Matlab programs with the comparison of the performance of original simulation methods and this proposed method based on the equivalent scatterers model. Results The experiment shows that the simulation method based on the equivalent scatterers model is more than 10 times faster than the traditional one under the same velocity resolution. Conclusion The simulation method based on the equivalent scatterers model can gready enhance the simulation speed of the ultrasound color flow imaging, and will bring convenience to the studies of the ultrasound color flow imaging.