In this paper, the basic principle of coded excitation is introduced. Through acoustic intensity analysis, the maximum improvement of SNR of ultrasonic image with coded excitation is deduced.

• 本文首先介绍了编码激励成像系统的原理 ,并对医学超声诊断系统中的发射声强进行了分析 ,得出了采用编码激励技术提高超声图像信噪比的上限。