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Amplitude extraction method for transmission attenuation ultrasonic tomography

A technology of ultrasonic tomography and extraction method, which is applied in the use of sound wave/ultrasonic wave/infrasonic wave to analyze solids, 2D image generation, image data processing, etc., which can solve the problem of large amplitude extraction error, poor consistency, and low channel signal-to-noise ratio and other problems to achieve the effect of reducing poor consistency, improving accuracy, and improving image reconstruction accuracy

Pending Publication Date: 2022-07-29
TIANJIN UNIV
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Problems solved by technology

[0005] In the ultrasonic tomography based on transmission attenuation, the invention proposes a time-frequency energy-based The analytical amplitude extraction method decomposes the original time-domain signal into time-domain spectral energy distribution, realizes adaptive denoising of the signal and multi-pulse recognition under complex noise, and obtains the comprehensive response frequency of the entire pulse wave by calculating the weighted spectral integral, And restore its corresponding spectrum intensity to time-domain pulse amplitude to realize accurate identification and amplitude extraction of multi-pulse waves in complex test signals

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  • Amplitude extraction method for transmission attenuation ultrasonic tomography
  • Amplitude extraction method for transmission attenuation ultrasonic tomography
  • Amplitude extraction method for transmission attenuation ultrasonic tomography

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[0043] The present invention is used for amplitude extraction of transmission attenuation ultrasonic tomography. In the embodiment, for the transmission attenuation strategy widely used in ultrasonic tomography, the method proposed in the present invention is used for amplitude extraction and imaging test. The denoising, pulse recognition performance and imaging effect of the proposed method are tested with a pair of ultrasonic transducers and a group of ultrasonic transducer arrays, respectively. The following examples are intended to be described as embodiments of the present invention, and are not the only forms that can be made or utilized, and other embodiments that can achieve the same function are also included within the scope of the present invention. figure 1The flow chart of applying the method of the present invention to extract the amplitude value is described, and the specific embodiments are as follows:

[0044] Step 1: For the received ultrasonic transducer suc...

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Abstract

The invention relates to an amplitude extraction method for transmission attenuation ultrasonic tomography, which comprises the following steps of: 1, carrying out signal denoising on an original low-signal-to-noise-ratio signal received by an ultrasonic transducer by a soft threshold wavelet denoising method based on homomorphic transformation; step 2, pulse identification is carried out based on a time domain fractional Fourier transform method of an adaptive fractional order; and step 3, searching the optimal frequency point of the weighted spectrum energy integral to carry out pulse amplitude extraction.

Description

technical field [0001] The invention belongs to the technical field of ultrasonic tomography, and relates to an amplitude extraction method for transmission attenuation ultrasonic tomography, which is used for reducing image reconstruction errors caused by poor consistency of received signals, low channel signal-to-noise ratio and severe crosstalk. , to achieve accurate measurement of ultrasonic transmission attenuation information and visual test of medium distribution. technical background [0002] Ultrasonic Tomography (UT) is a structural imaging technology that reconstructs the measured field by arranging an ultrasonic sensor array outside the measured field and applying a certain excitation to obtain boundary voltage measurement data. Internal refractive index, attenuation coefficient or acoustic impedance distribution. Compared with soft-field imaging techniques such as Electrical Impedance Tomography (EIT) and Magnetic Impedance Tomography (MIT), UT has the advantag...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T11/00G06K9/00G01N29/06
CPCG06T11/005G01N29/0672G06F2218/22G06F2218/04
Inventor 谭超张志兴刘皓董峰
Owner TIANJIN UNIV