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Method for detecting transmission speed of shear wave in biological tissue, method for detecting elasticity of biological tissue and method for biological tissue elasticity imaging

A technology of biological tissue and transmission speed, applied in organ movement/change detection, ultrasonic/sonic/infrasonic image/data processing, sound wave diagnosis, etc., can solve problems such as poor repeatability, achieve fast calculation speed, and improve signal-to-noise ratio , the effect of high sensitivity

Active Publication Date: 2015-05-13
SUZHOU INST OF BIOMEDICAL ENG & TECH CHINESE ACADEMY OF SCI
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Problems solved by technology

Therefore, similar methods can only qualitatively display the elastic information of superficial tissues, and the repeatability is poor.

Method used

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  • Method for detecting transmission speed of shear wave in biological tissue, method for detecting elasticity of biological tissue and method for biological tissue elasticity imaging
  • Method for detecting transmission speed of shear wave in biological tissue, method for detecting elasticity of biological tissue and method for biological tissue elasticity imaging
  • Method for detecting transmission speed of shear wave in biological tissue, method for detecting elasticity of biological tissue and method for biological tissue elasticity imaging

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Embodiment Construction

[0042] Modal Assurance Criteria (MAC) is generally used to calculate the linear independence of the measured mode shape and the reference mode shape in mechanical vibration. Its definition can be expressed as follows:

[0043]

[0044] in, and are the characteristic vector of the waveform signal to be identified and the characteristic vector of the reference waveform signal, respectively.

[0045] In the matching analysis of arbitrary waveform signals using this method, it is first necessary to discretize the waveform signal, and then construct its characteristic vector for the discrete waveform signal, and then according to the characteristic vector of the reference waveform signal and the waveform signal to be detected The eigenvectors construct the overall modal confidence matrix. The smaller the off-diagonal elements of the modal confidence matrix, the better the independence of the two waveforms, and vice versa, the greater the correlation between the two waveform...

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Abstract

The invention discloses a method for detecting transmission speed of a shear wave in biological tissue, a method for detecting elasticity of the biological tissue and a method for biological tissue elasticity imaging. The method for detecting the transmission speed of the shear wave in the biological tissue is characterized in that the distance of any two positions in the to-be-detected tissue in the shear wave transmission direction and time difference of MAC values of real-time echo signals and original echo signals changing on the two positions respectively are used for calculating the transmission speed of the shear wave between the two positions. The modal assurance criterion is used for tracking the shear wave, a fine shape change estimation of the issue under the action of the shear wave can be achieved, and the signal to noise ratio, the resolution ratio and the contrast degree of an image can be improved. The sensitivity is high. The modal assurance criterion serves as a time domain calculation method for ultrasound echo radio frequency signals, the consistency of calculating processes is better, multi-term continuous modality confidence divisor calculating tasks can be permitted to be concurrently operated in the same time, and that is, parallel calculating is performed to enable complex calculating operation of the whole elastic image to obtain a higher speed-up ratio. Accordingly, the method can effectively improve the calculating speed of an elastic imaging algorithm, and achieve real-time tracking of the shear wave in the transmission process.

Description

technical field [0001] The invention relates to a method for detecting the transmission speed of shear waves in biological tissues, a method for detecting the elasticity of biological tissues and a method for imaging elasticity of biological tissues. Background technique [0002] In medical diagnosis, the elastic information of biological tissue has very important reference value for diagnosing diseases. It is generally believed that the pathological changes of soft tissue are often related to the hardness of the tissue. For example, the firmness or elasticity of tissue can change as the tumor grows or spreads through the tissue. Even before tumors show morphological changes, their stiffness changes, resulting in a large difference in elasticity between normal and diseased tissue. This method of imaging by distinguishing the response (strain, displacement, etc.) of different biological tissues under the action of external force by using the difference in mechanical propert...

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Application Information

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IPC IPC(8): A61B8/08
CPCA61B8/0833A61B8/485
Inventor 焦阳顾天明崔崤峣徐杰
Owner SUZHOU INST OF BIOMEDICAL ENG & TECH CHINESE ACADEMY OF SCI
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