An Ultrasonic Plane Wave Imaging Method Based on Improved DMAS Algorithm

Abstract

The invention belongs to the field of ultrasonic plane wave imaging, and in particular relates to an ultrasonic plane wave imaging method based on an improved DMAS algorithm, comprising the following steps: 1) transmitting a plane wave ultrasonic signal at a certain composite angle through a B-ultrasonic device simulated by FieldII; 2) calculating the plane wave The square root of the echo data of the ultrasonic signal and its cumulative sum item; 3) the delay-multiply-accumulate beamforming algorithm, namely DMAS, is improved to obtain the delay-multiply-multiply-multiply beamforming algorithm, namely the DSBM algorithm: 4) repeat steps 2 to Step 3, obtaining each frame of image data; 5) Combining with the generalized coherence coefficient, obtain the DSBMGCF algorithm, and obtain the corrected imaging result according to the algorithm. The present invention combines the advantages of the time-delay multiply-accumulate beamforming algorithm and the generalized coherence coefficient, and solves the problem that the image quality and the imaging frame frequency of the plane wave spatial composite imaging cannot be achieved at the same time under the premise of ensuring a relatively high imaging frame rate, and The utilization rate of memory resources is saved.

Description

[0001] Technical field [0002] The invention belongs to the field of ultrasonic plane wave imaging, in particular to an ultrasonic plane wave imaging method based on an improved DMAS algorithm. [0003] technical background [0004] The traditional ultrasonic beamforming link usually adopts the delay superposition method of a single beam, and adds the echo signals received by each array element after a corresponding delay to obtain the signal of a scanning line. To form an ultrasonic image, it needs Hundreds of times of beam transmission and processing, therefore, although this method is simple and feasible, but the imaging frame rate is low, which cannot meet the imaging requirements of moving organs such as the heart. [0005] Aiming at the problem of low frame frequency, the concept of ultra-fast ultrasonic imaging is proposed in the field of medical ultrasound. It is generally based on plane wave emission, and the data of the entire imaging area can be obtained through one...

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Problems solved by technology

Therefore, the more the number of composite angles, the better the imaging quality, but at the same time it will make the imaging time longer and cause a certain loss of frame rate, and because the composite times of different imaging areas are different, the imaging quality distribution is uneven and the image cannot be effectively improved resolution

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