Anti-perspective plane transformation-based ultrasonic plane wave imaging method

Abstract

The invention discloses an anti-perspective plane transformation-based ultrasonic plane wave imaging method. The method comprises the following steps of (1) collecting data; (2) preprocessing the data: converting imaging points on an original imaging plane into imaging points on a new plane by utilizing plane conversion, calculating delay time according to the imaging points on the new plane to obtain corrected delay time, then receiving and focusing the imaging points on the original imaging plane by utilizing a synthetic aperture focusing technology according to the corrected delay time, and obtaining a value of each imaging point on the original imaging plane; and (3) post-processing the data: performing envelope detection, logarithmic compression and grayscale mapping in sequence, and finally obtaining an ultrasonic plane wave imaging image. According to the method, a key delay time calculation mode is improved and matched with the synthetic aperture focusing technology, so that compared with the prior art, the problem of low plane wave imaging quality can be effectively solved and the ultrasonic plane wave imaging resolution is effectively increased.

Description

technical field [0001] The invention belongs to the technical field of high-resolution ultrasonic imaging, and more particularly relates to an ultrasonic plane wave imaging method based on inverse perspective plane transformation. Background technique [0002] Ultrasonic detection has the advantages of good directivity, low price, harmless to the human body, and easy to carry equipment. Therefore, the detection technology using ultrasound as the emission source instead of ray to irradiate the object has gradually become a new pursuit pursued by researchers in the field of ultrasound applications. one of the goals. [0003] Plane wave imaging only needs one shot to complete the imaging of the entire region of interest, so it is an ideal way for fast ultrasound imaging. However, compared with traditional ultrasound imaging with multiple shots and focusing, the plane wave lacks a focusing process during its launch. The image quality obtained only by accepting focusing is low i...

AI Technical Summary

Problems solved by technology

[0005] In view of the above defects or improvement needs of the prior art, the object of the present invention is to provide an ultrasonic plane wave imaging method based on inverse perspective plane transformation, wherein the calculation method of the key delay time is improved, and it is compared with the synthetic aperture focusing technology. Compared with the existing technology, it can effectively solve the problem of low plane wave imaging quality, effectively improve the imaging resolution of ultrasonic plane waves, and the method has a fast processing speed, only needs one emission of ultrasonic plane waves, and uses multiple array elements to detect echoes Data can be collected

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