A Fast Imaging Algorithm Based on Ultrasonic Ring Array Synthetic Aperture Reception

Abstract

The invention belongs to the field of ultrasonic detection and imaging, and provides a fast imaging algorithm based on ultrasonic ring array synthetic aperture receiving. The ring array ultrasonic transducer is used to transmit and receive ultrasonic signals in a synthetic aperture receiving mode, and the ring array ultrasonic transducer The array elements are grouped by each group of n adjacent array elements, and the index matrix D of the sector area formed by the first group of array elements 1 to n and the center of the ring array ultrasonic transducer is calculated. 1 ; set the initial value i = 1; use the synthetic aperture algorithm to obtain the corresponding local imaging result I i ; Obtain the i-th index matrix D through the rotation transformation i , and repeat the first two steps until all local imaging results are obtained; all local imaging results are superimposed and fused according to their positions to obtain the final imaging result. Through the algorithm provided by the present invention, the arc-shaped artifacts in the traditional synthetic aperture imaging algorithm can be effectively removed, and the performance of the algorithm can be greatly improved.

Description

technical field [0001] The invention belongs to the field of ultrasonic detection and imaging, in particular to a fast imaging algorithm based on ultrasonic ring array synthetic aperture reception. Background technique [0002] Synthetic aperture technology was first used in radar detection. Compared with traditional fixed-point focusing technology, ultrasonic synthetic aperture imaging technology adopts dynamic focusing, and can use transducers with small aperture array elements and lower center frequency to achieve high azimuth resolution imaging. , and improve the overall imaging quality in the area to be imaged. Ultrasound synthetic aperture imaging technology has been used in intravascular imaging, liver lesions imaging and so on. For ring array transducers, if the traditional full-aperture synthetic aperture imaging technology is used, the imaging results have problems such as inaccurate inner surface, excessive artifacts, and time-consuming imaging. SUMMARY OF THE ...

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Problems solved by technology

For ring array transducers, if the traditional full-aperture synthetic aperture imaging technology is used, the imaging results have problems such as inaccurate inner surfaces, excessive artifacts, and long imaging time.

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