Ultrasonic CT-based synthetic aperture imaging method and system

Abstract

The invention discloses an ultrasonic CT-based synthetic aperture imaging method and system. The method comprises the following steps: S1, acquiring data received through ultrasonic reflection by utilizing an ultrasonic CT annular array probe, so as to obtain raw echo data; S2, conducting synthetic aperture focusing on the echo data, so as to obtain values of all imaging points; S3, rotating the ultrasonic CT annular array probe and repeating the steps S1-S2, so as to obtain a plurality of groups of imaging point values, wherein each rotating angle is smaller than an included angle between two adjacent array elements and the circle center of the annular array probe; S4, conducting weighted averaging on the imaging point values, and then carrying out envelope detection, logarithmic compression and grey mapping treatment in sequence, so as to obtain a final high-resolution image. The invention further provides the system for implementing the method. According to the method and the system, the raw data are acquired based on ultrasonic CT (UCT) in a multi-rotating manner, and such treatment measures as weighted stacking are adopted, so as to effectively reduce the influence of noise and improve the image resolution.

Description

technical field [0001] The invention relates to the technical field of high-resolution ultrasonic imaging, in particular to an ultrasonic CT-based synthetic aperture imaging method and system. Background technique [0002] Ultrasonic CT refers to measuring the projection data of an object under the irradiation of ultrasonic waves through ultrasonic equipment without damaging the internal structure of the research object. Using these data, two-dimensional or three-dimensional ultrasonic images can be reconstructed. 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] The main disadvantages of ultrasound imaging are the low resolution and poor contrast of ultrasoun...

AI Technical Summary

Problems solved by technology

The main reason is that several difficulties of this technology have not been overcome in China: the number of array elements of the ring array probe is large, the manufacturing and processing technology is complicated; the number of channels is large, and the amount of data is large; it is difficult to select a suitable reconstruction algorithm to achieve high-resolution images

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