摘要
通过数值方法求解KZK方程,对吸收媒质中X波的非线性声场进行计算和仿真。结果表明:在非线性、衍射和吸收三种效应的综合作用下,X波的非线性声场同样具有类似于线性声场的显著的有限衍射特性,可以在整个成像区域获得一致的高分辨率,从而同时实现较高帧率和较高分辨率的超声成像。
The nonlinear field of X wave in absorbing medium is calculated and simulated by solving the KZK equation using a numerical method. Resembling as the linear field, the result indicates that by accounting for the nonlinearity, diffraction and absorption, the nonlinear field of X wave has a remarkable property of limited - diffraction. A uniform higher spatial resolution would be obtained in full imaging range and an ultrasound imaging method with high spatial resolution and high frame rate may be realized.
出处
《生物医学工程研究》
2009年第2期124-127,共4页
Journal Of Biomedical Engineering Research
基金
国家自然科学基金资助项目(30800270)
中国科学技术大学青年科学基金资助项目(No.KA2100230001)
关键词
X波
KZK方程
有限衍射
时域数值方法
非线性
X wave
KZK equation
Limited - diffraction
Time - domain numerical method
Non - hnearity
