超声相关加权合成断面成像检测方法研究

本文首先介绍了合成孔径聚焦超声成像的基本原理。针对提高成像的分辨率和信噪比问题，研究了原始采样信号的相关性，提出了一种基于信号相关度加权的合成新算法和原始数据预处理方法。利用改进方法对试样进行了断面成像实验，实验结果表明：与传统的延时一叠加合成孔径算法相比，新方法提高了图像的横向分辨率和信噪比，改善了图像质量。

Study on the profile ultrasonic imaging testing based on correlation degree weighted synthesizing

At first, the principle of synthetic aperture focusing technique for ultrasonic imaging is introduced in this paper. Aimed at the problem of resolution and signal-noise ratio in SANF imaging, the correlation coefficient of the original echo data is studied, and an novel SANF algorithm based on signal Correlation degree weighted synthesizing method and the processing metliod of original data are put forward. The novel algorithm is used to reconstruct an ultrasonic profile imaging for a specimen. The results of the imaging experiment indicate that compared with the traditional time-delay SAFF principles, the novel algorithm has improved the axial resolution and meliorated the imaging shaping effectively.