Numerical simulation on acoustic radiation force induced by ultrasonic coded excitation
Numerical simulation on acoustic radiation force induced by ultrasonic coded excitation
复制标题
超声编码激励声辐射力的数值模拟
DOI：
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发表时间：
2011
期刊：
影响因子：
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通讯作者：
Zhengdi Qin
中科院分区：
文献类型：
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作者：
Siping Chen;Sining Zeng;Tianfu Wang;Zhengdi Qin
一种基于扩频技术的超声弹性成像编码激励方法，建立了超声场中剪切波分布的统计模型，理论分析和计算机仿真表明，采用编码激励比脉冲激励能更有效地利用系统资源，将检测技术与编码脉冲相结合，采用不同的编码共享激励和检测之间的相关性，可以实现较低的互相关，从而可以提高整个系统的激励占空比和检测信噪比。
A coded excitation method in ultrasonic elastography,based on the spread spectrum technology,was proposed.A statistical model for the shear wave distribution in the ultrasound field was set up.The theoretical analysis as well as the computer simulation shows that using a coded excitation for the system resources it is more efficient than using a pulsed excitation.Combining the detection technology with coded pulses using different codes for sharewave excitation and the detection,a lower cross-correlation can be achieved so that both the duty cycle of the excitation and the signal-to-noise ratio of the detection can be improved for the whole system.