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Study on Property of Nonlinear Field of Limited-Diffraction X Waves
Author(s): 
Pages: 512-516
Year: Issue:  3
Journal: Acta Electronica Sinica

Abstract: X波用于超声成像可以获得很高的帧率,但在线性成像模式下图像空间分辨率相对于传统的聚焦成像有所下降.本文通过时域数值方法求解KZK(Khokhloy-Zabolotskaya-Kuznetsov)方程,研究有限衍射X波的非线性声场特性.结果表明:无论宽带或限带X波,其非线性声场同样是有限衍射波,并且二次谐波具有比基波更窄的主瓣和更小的副瓣.采用X波的二次谐波进行成像能够在整个成像区域获得更高的分辨率...
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