Fractional Fourier Transform Echo Imaging Method and System Based on Probe Compensation

A fractional Fourier and echo imaging technology, applied in ultrasonic/sonic/infrasonic Permian technology, sonic diagnosis, infrasound diagnosis, etc., to achieve good anti-noise performance, improve detection and imaging accuracy, and eliminate effects.

Active Publication Date: 2021-10-26
SOUTH CHINA UNIV OF TECH
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Problems solved by technology

[0014] Aiming at the limitations of the current ultrasonic detection system on LFM signals, the present invention provides a method and system for fractional Fourier transform echo imaging based on probe compensation to achieve higher imaging accuracy

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  • Fractional Fourier Transform Echo Imaging Method and System Based on Probe Compensation
  • Fractional Fourier Transform Echo Imaging Method and System Based on Probe Compensation
  • Fractional Fourier Transform Echo Imaging Method and System Based on Probe Compensation

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Embodiment Construction

[0106] The specific implementation of the present invention will be further described in detail below in conjunction with the embodiments and the accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0107] The fractional-order Fourier transform echo imaging method based on probe compensation comprises the following steps:

[0108] S1. First perform the frequency response compensation of the ultrasonic probe, including two parts: the measurement of the frequency response of the ultrasonic probe and the compensation of the frequency response of the echo signal probe;

[0109] S2, performing pulse compression and imaging based on fractional Fourier transform.

[0110] Such as figure 1 As shown, the device for measuring the frequency response of an ultrasonic probe includes a signal sending unit in the data processing unit, a D / A converter, an A / D converter, a transmitting ultrasonic probe, a receiving ultrasonic probe, and a signal recei...

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Abstract

The present invention provides a fractional Fourier transform echo imaging method and system based on probe compensation, which is characterized in that the frequency response compensation of the ultrasonic probe is performed first, and then the energy aggregation characteristics of the LFM signal in the fractional Fourier domain are utilized Perform pulse compression and image. The frequency response compensation of the ultrasonic probe includes two parts: measurement of the frequency response of the ultrasonic probe and compensation of the frequency response of the echo signal probe. Ultrasonic probe frequency response measurement can use methods based on time domain, frequency domain or time-frequency domain to solve the impulse response of the ultrasonic probe; do the fractional Fourier transform of the optimal order to the echo signal after compensation to The energy gathering domain realizes pulse compression, performs envelope detection on the result after pulse compression, and then converts the abscissa u of the fractional Fourier transform domain into a time delay τ, and converts the amplitude into a gray value, and finally according to the time Image extension and grayscale. The invention has the advantages of high echo detection precision, high imaging quality, good anti-noise performance and the like.

Description

technical field [0001] The present invention relates to the technical field of ultrasonic imaging, and more particularly, to a method and system for fractional Fourier transform echo imaging based on probe compensation. Background technique [0002] Ultrasonic imaging technology is one of the most important technologies in the medical ultrasonic diagnosis system. Medical ultrasound imaging is widely used due to its low intensity, non-invasive, low cost and ease of use. Especially in the detection of human soft tissue and hemodynamic observation of cardiovascular organs, it has irreplaceable advantages. With the rapid development of electronics, bioengineering, image and information processing technology, and computer technology, ultrasound imaging has developed into a mature medical imaging discipline with very broad prospects for development. [0003] Today's ultrasound imaging technology mainly utilizes the delay characteristic of signal propagation: the signal is sent o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B8/00
CPCA61B8/4444A61B8/48A61B8/52
Inventor 杨萃姜茗耀于悦宁更新陈芳炯
Owner SOUTH CHINA UNIV OF TECH
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