Ultrasonic plane wave imaging method based on modified DMAS (delay-multiplication accumulative beamforming synthesis) algorithm

Abstract

The invention belongs to the field of ultrasonic plane wave imaging and particularly relates to an ultrasonic plane wave imaging method based on a modified DMAS (delay-multiplication accumulative beamforming synthesis) algorithm, comprising the steps of 1) transmitting, by a FieldII-simulated B-mode ultrasound apparatus to emit a plane wave ultrasonic signal of certain composite angle; 2) calculating echo data square root of the plane wave ultrasonic signal and it's a cumulative sum item; 3) modifying the DMAS algorithm to obtain a DSBM (delay-accumulation multiplication beamforming) algorithm; 4) repeating the steps 2 to 3 to obtain data of each frame image; 5) acquiring a DSBMGCF (delay-accumulation multiplication beamforming generalized correlation coefficient) algorithm in conjunctionwith generalized correlation coefficient, and acquiring corrected imaging results according to the DSBMGCF algorithm. The advantages of the delay-multiplication accumulation beamforming synthesis algorithm and those of the generalized correlation coefficient are integrated; the problem that good plane wave spatial combination image quality and high imaging frame frequency cannot be attained at thesame time is solved at the premise of ensuring high imaging frame frequency, and fewer memory resources are utilized.

Description

Technical field [0001] 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. technical background [0002] 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. [0003] 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 emission, whic...

AI Technical Summary

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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