非线性合成孔径聚焦超声成像

Non-linear synthetic aperture focusing for ultrasonic imaging

论文介绍了合成孔径聚焦超声成像系统原理。建立了一个无损检测超声成像系统。同时,为了进一步提高分辨率;设计了基于相关系数的非线性合成孔径聚焦算法。然后利用此算法对试块成像,结果表明,与延时叠加合成孔径算法相比,基于相关性分析的非线性合成孔径算法提高了图像的分辨率,改善了图像质量。

This paper mention briefly the principle of ultrasonic imaging system based on Synthetic Aperture Focusing Technology, and show an ultrasonic imaging system for NDT. At the same time, to improve the resolution, the authors design a non-linear SAFT algorithm based on the concept of correlation coefficient, uses the algorithm to reconstruct an ultrasonic imaging for a specimen, Results of the test indicate: compare to the time-delay SAFT principles, the SAFT principle based on the concept of correlation analysis improved the axial resolution and meliorated the imaging shaping effectively.