Rapid 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 rapid imaging algorithm based on ultrasonic ring array synthetic aperture reception, which comprises the following steps: transmitting and receiving ultrasonic signals by using a ring array ultrasonic transducer in a synthetic aperture receiving mode, grouping array elements of the ring array ultrasonic transducer according to n adjacent array elements in each group, and calculating an index matrix D1 of a fan-shaped area formed by the first group of array elements 1-n and the circle center of the ring array ultrasonic transducer; setting an initial value i = 1; acquiring a corresponding local imaging result Ii by using a synthetic aperture algorithm; obtaining an ith group of index matrix Di through rotation transformation, and repeatedly executing the previous two steps until all local imaging results are obtained; and overlapping and fusing all local imaging results according to the positions of the local imaging results to obtain a final imaging result. Through the algorithm provided by the invention, arc artifacts in a traditional synthetic aperture imaging algorithm can be effectively removed, and the algorithm performance is 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 small-aperture array element transducers and lower center frequencies to achieve high-resolution imaging in azimuth , and overall improve the imaging quality in the area to be imaged. Ultrasonic synthetic aperture imaging technology has been applied in intravascular imaging, liver lesion 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 surfaces, excessive artifacts, and long imaging time. Contents of the inv...

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Problems solved by technology

For ring array transducers, if the traditional full-aperture synthetic aperture imaging technology is used, th

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