摘要
针对超声激励成像一直受"多径反射干扰"的影响,消除多径伪影的相关算法一直未能有所突破的问题,设计了一个超声激励成像的仿真软件,为消除多径干扰的算法研究提供条件。仿真软件设计的难点在于多重反射路径的快速准确计算。通过研究,采用改进的Cyrus-Beck算法确定声传播轨迹与各个边界的交点和反射路径,能更有效快捷地进行声传播轨迹的解算,编程实现上也大大减少了代码量。结果表明:仿真软件可以较好地仿真超声激励成像过程,得到的接收信号能较好地反应多径反射情况,为研究消除多径干扰的算法奠定了重要基础。将仿真信号与Greenleaf团队用物理实验获取的信号进行对比,两信号波形非常相似,验证了该仿真软件的有效性。
In order to solve the problem that vibro-acoustography is influenced by multipath reflection interference and the related algorithm for multipath mitigation is unable to break through,the simulation software of vibro-acoustography was designed to help the algorithm research to solve the multipath interference. The improved Cyrus-Beck algorithm was used to determine the intersection points of the boundaries and the wave propagation track,which can make the calculation of the wave tracing more effectively. As the results,the simulation software can simulate the vibro-acoustography effectively,and the received signal can better reflect the multipath reflection,and provide an important way to solve the multipath interference. Comparing with the acquisition of physical experiments by Greenleaf teem showed that the two waves were very similar,and the software's validity was proved.
出处
《四川大学学报（工程科学版）》
EI
CAS
CSCD
北大核心
2016年第S1期157-162,共6页
Journal of Sichuan University (Engineering Science Edition)
基金
四川省科技支撑计划资助项目(2014GZ0005-7)
国家自然科学基金资助项目(81301286)
