Ultrasonic Multi-Wave Imaging Based On Plane Wave By Adaptive Beamforming

The imaging range of a single angle plane wave is greatly affected by the array size. In this paper, a virtual focus is used for plane wave emission, which can greatly improve the imaging range of single imaging. And plane wave multi-wave imaging method is proposed. In this method, twice plane waves are emitted, and the echo are calculated according to the velocities of compressional and shear-vertical wave respectively. Then the adaptive beamforming is carried out and the image is superimposed. By adding shear wave component, plane wave ultrasonic multi-wave imaging can effectively improve the testing sensitivity of small defects and the ability of testing at higher steering angles.