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A Synthetic Aperture Focused Ultrasound Imaging Method Based on Compressed Sensing

A technology of synthetic aperture focusing and ultrasonic imaging method, which is applied in the direction of sound wave re-radiation, instruments, measuring devices, etc., can solve the problems of reducing computational complexity, large amount of data, and difficult real-time imaging, etc., and achieve the effect of reducing computational complexity

Active Publication Date: 2022-03-25
无锡天工捷通科技有限公司
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  • Application Information

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Problems solved by technology

[0003] Purpose of the invention: Aiming at the shortcomings of large amount of data, high system complexity and difficult real-time imaging in the SAF ultrasonic imaging process, the present invention proposes a synthetic aperture focused ultrasonic imaging method based on compressed sensing, which effectively reduces the dimension of the data matrix and reduces the Computational complexity, better recovery of synthetic aperture focusing imaging

Method used

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  • A Synthetic Aperture Focused Ultrasound Imaging Method Based on Compressed Sensing
  • A Synthetic Aperture Focused Ultrasound Imaging Method Based on Compressed Sensing
  • A Synthetic Aperture Focused Ultrasound Imaging Method Based on Compressed Sensing

Examples

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Embodiment

[0062] The parameters used in the following examples are as follows:

[0063] 64 uniform linear arrays with equal spacing composed of ultrasonic transducers, transmitting signal frequency f 0 = 3MHz, sampling frequency f s =100MHz, sound velocity c=1540m / s, array element spacing is d=c / 2f 0 , the scanning mode of the ultrasonic signal is SAF, a total of 6 scattering points are set along the z-axis direction, uniformly distributed in the range of 20-70mm, and the interval is 10mm, and the DWT transformation uses "rbio6.8" in the ReverseBior wavelet system, single column The echo signal is the data of the 32nd scan, and the noise and interference are all subject to the standard normal distribution.

[0064] Figure 4 It is the sparse representation of the single row echo signal under three kinds of sparse bases. In the figure, the vertical axis represents the normalized amplitude of the received signal, and the horizontal axis represents the number of sampling points. Figur...

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Abstract

The invention discloses a synthetic aperture focused ultrasonic imaging method based on compressed sensing. The invention utilizes the compressed sensing theory and the synthetic aperture focused ultrasonic imaging method. On the premise that the original array echo signal has been obtained, the measurement in the compressed sensing theory The matrix is ​​combined with the channel weights in the synthetic aperture focusing scanning mode, so that the array realizes non-uniform sampling in the process of receiving signals, and the measurement signal is obtained; the sparse matrix and the measurement matrix are respectively calculated by the original array echo signal and the measurement signal, and The sparse matrix and measurement matrix are used to import the reconstruction algorithm to reconstruct the data matrix for subsequent imaging processing. The method of the invention effectively reduces the dimension of the data matrix, reduces the computational complexity, better restores the synthetic aperture focusing imaging image, and provides a theoretical reference for ultrasonic real-time imaging.

Description

technical field [0001] The invention relates to the field of synthetic aperture hyperfocused acoustic imaging, in particular to a synthetic aperture focused ultrasonic imaging method based on compressed sensing. Background technique [0002] Synthetic aperture ultrasound imaging is a novel medical ultrasound imaging method. Because it can generate high-resolution and high-contrast ultrasound images, it has become a commonly used method in modern digital medical ultrasound imaging (see literature: Wang Dongya, Yu Chenglong, Peng Hu . FPGA-based synthetic aperture ultrasound imaging beamforming design[J]. Journal of University of Science and Technology of China, 2014,44(2):147-152.). Synthetic aperture technology realizes the dynamic focusing of transmission and reception, and needs to store the echo data generated each time. The amount of data storage is very large, which directly and indirectly affects the complexity of hardware implementation and the imaging frame rate. Co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S15/89G01S7/52
Inventor 郭业才陈晨季晓星王超
Owner 无锡天工捷通科技有限公司