摘要
时间反转法是一种具有独特优点的自适应聚焦方法，对超声成像中图象畸变的消除有重要价值。本文就声场中存在介质分平面时，对时间反转法实现自聚焦的声场给出了解析式；并运用所建立起来的时间反转成像实验系统进行了有平界面存在时的自聚焦实验，实验所得自聚焦增益与理论计算结果相符。
Time reversal is an unique self-adaptive focusing technique important to ultrasonic imaging. In this paper, the principle and the analytic expression of the ultrasound field in the realization of time reversal during the presence of an interface between two media are presented. Experimental results of time reversal are given and found to agree with theoretical ones.
出处
《应用声学》
CSCD
北大核心
1999年第3期1-5,共5页
Journal of Applied Acoustics
基金
国家自然科学基金
声学所所长基金
关键词
时间反转
自适应聚焦
存在界面
超声成像
: Time reversal, Self-adaptive focusing, Presence of an interface, Ultrasonic imaging
