Synthetic aperture ultrasonic imaging motion compensation method

Abstract

The invention relates to a synthetic aperture ultrasonic imaging motion compensation method which is applied to an array including N array elements. The method includes the steps of obtaining synthetic aperture imaging data, conducting beam forming on the synthetic aperture imaging data to obtain a low-quality image LRI, obtaining motion estimation data, and conducting beam forming on the motion estimation data to obtain a low-quality image VCI; repeatedly executing the synthetic aperture data obtaining operation, and repeatedly executing the motion estimation data obtaining operation, wherein one-time motion estimation data obtaining operation exists between every two times of synthetic aperture imaging data obtaining operation; conducting motion displacement estimation on a series of VCI to obtain the motion estimation value D of each scanning line between the LRI; conducting compensation on each scanning line of the LRI through the motion estimation values D to obtain compensated low-quality images CLRI; adding the first low-quality image LRI and all the CLRI so as to obtain a high-quality image HRI.

Description

technical field [0001] The present invention relates to a motion compensation method, in particular, to a motion compensation method for synthetic aperture ultrasound imaging. Background technique [0002] In synthetic aperture focusing imaging, through the non-focused sound source emission, all the array elements receive the received data point-by-point beamforming to achieve one emission to obtain a low-quality image (LRI), and then through multiple low-resolution The high-quality image (HRI) is obtained by coherent addition of the quality image, so that the transmission and reception point-by-point focusing can be realized without tissue movement, and the resolution of the image can be improved. But the tissue motion between low-quality images will reduce the coherence between low-quality images, thus affecting the imaging quality. There are two ways to solve this problem, one is to increase the frame rate of the system, so that the motion displacement between two low-qu...

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the defect that the prior art cannot perform effective motion compensation for the situation that the axial displacements at different lateral positions of the imaging plane are different, thereby providing effective motion compensation for the situation where the axial movement rate of the imaging plane is uniform Synthetic Aperture Ultrasound Imaging Motion Compensation Method

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