Ultrasonic plane wave imaging method and system based on frequency domain migration and storage medium

Abstract

The invention provides an ultrasonic plane wave imaging method and device based on frequency domain migration and a storage medium. The method comprises the steps of obtaining echo signals received at three emission angles; constructing echo signal frequency domain space coordinates corresponding to the image frequency domain space coordinates; carrying out fast Fourier transform (FFT) on the echo signal at each emission angle in the space direction, and carrying out non-uniform Fourier transform (NUDFT) on the obtained frequency spectrum signal in the time direction to obtain the coordinates of the echo signal in the frequency domain space of the echo signal; completing calculation of the non-uniform Fourier transform based on a low-rank matrix constructed by using a Chebyshev polynomial; and carrying out inverse fast Fourier transform (IFFT) on the filtered signals, compounding the echo signals at the three emission angles, and then carrying out inverse fast Fourier transform to obtain a compounded ultrasonic image. According to the invention, the ultrasonic plane wave imaging speed is greatly increased, a high-quality image can be obtained, and a relatively high imaging frame frequency can be ensured.

Description

technical field [0001] The invention relates to the technical field of medical imaging, in particular to an ultrasonic plane wave imaging method, system and storage medium based on frequency domain migration. Background technique [0002] Ultrasound imaging has the advantages of non-invasiveness, safety, convenience, and high real-time performance. It is widely used in fetal, cardiac, and abdominal imaging, and is one of the most important imaging modes in clinical diagnosis. [0003] Traditional ultrasonic imaging adopts the focused wave line-by-line scanning imaging mode, that is, one column of an image is obtained by transmitting the focused wave once and receiving the echo signal, so it takes hundreds of transmission-reception processes to form an image, and its imaging speed Generally, it is 20-100 frames per second, which limits the frame rate of traditional ultrasound imaging. In recent years, researchers have proposed the plane wave imaging mode. By emitting plane w...

AI Technical Summary

Problems solved by technology

However, linear frequency interpolation is mostly used in frequency-domain ultrasound imaging at present, which will generate errors and reduce image quality

In addition, although the non-uniform Fourier transform (NUDFT) based on min-max interpolation is widely used in the field of magnetic resonance imaging, it needs to calculate the interpolation function under different deflection angles in real time during ultrasonic plane wave imaging, which cannot meet the real-time requirements.

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