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Inversion method of nuclear magnetic resonance signals facing multiple relaxation components

A nuclear magnetic resonance and transverse relaxation technology, applied in the field of medical imaging, can solve the problems of difficult quantitative analysis, lack of dominance, slow calculation speed of nonlinear inversion singular value decomposition method, etc., and achieve the effect of accurate solution results

Inactive Publication Date: 2019-08-09
SOUTHEAST UNIV +1
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Problems solved by technology

However, due to the slow calculation speed of the nonlinear inversion singular value decomposition method, it does not have an advantage when dealing with a large amount of NMR data.
[0004] In addition, the existing inversion methods are difficult to deal with samples with multiple relaxation components
The calculation results are not accurate enough to quantitatively analyze the characteristics of the tested samples

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  • Inversion method of nuclear magnetic resonance signals facing multiple relaxation components
  • Inversion method of nuclear magnetic resonance signals facing multiple relaxation components
  • Inversion method of nuclear magnetic resonance signals facing multiple relaxation components

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Embodiment Construction

[0030] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, so as to define the protection scope of the present invention more clearly.

[0031] see figure 1 As shown, an inversion method for nuclear magnetic resonance signals of multiple relaxation components is characterized in that it comprises the following steps:

[0032] 1. Preprocess the original nuclear magnetic resonance signal data, obtain the signal-to-noise ratio of the collected data and the basic parameters of the collected data;

[0033] 2. Data compression of nuclear magnetic resonance signals by SVD algorithm;

[0034] 3. Solve the NMR inversion equation m=Ks based on the BRD algorithm, and the obtained solution is the distribution data of the transverse relaxation time contained in different relaxation components...

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Abstract

The invention relates to an inversion method of nuclear magnetic resonance signals facing multiple relaxation components. The inversion method of the nuclear magnetic resonance signals facing the multiple relaxation components is characterized by comprising the following steps that (1) original nuclear magnetic resonance signal data are preprocessed, and the signal-to-noise ratio of collected dataand basic parameters of the collected data are obtained; (2) the nuclear magnetic resonance signals are subjected to data compression by an SVD algorithm; (3) an inversion equation of nuclear magnetic resonance is solved based on a BRD algorithm, and obtained solutions are distributed data of transverse relaxation time contained by different relaxation components; and (4) an nuclear magnetic resonance inversion spectrum is drawn, and inversion results are quantificationally evaluated. Compared with an existing nuclear magnetic resonance inversion method, the inversion method of the nuclear magnetic resonance signals facing the multiple relaxation components can process the nuclear magnetic resonance signals with multiple groups of component samples efficiently, can obtain better results under a low signal-to-noise ratio, and has important significance for the aspects of experimental sample identification and quantitative analysis of composition components.

Description

technical field [0001] The invention relates to the technical field of medical imaging, in particular to an inversion method for nuclear magnetic resonance signals of multiple relaxation components. Background technique [0002] Nuclear Magnetic Resonance (NMR) is an important non-destructive testing technology, widely used in physics, chemistry, medicine and petroleum exploration and other fields. Low-field nuclear magnetic resonance detection technology mainly studies the relaxation mechanism of the tested sample, and is an important means of quantitatively evaluating the physical properties of the tested sample. For the sample to be tested with multiple relaxation components, the amplitude of the measured NMR signal is the result of the joint action of all the relaxation components, and the signal amplitude decays exponentially. The process of obtaining the NMR relaxation distribution from the original NMR echo signal is called the inversion process, and its essence is t...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R33/50A61B5/055
CPCA61B5/055G01R33/50
Inventor 陆荣生陈朗胡剑雄臧波
Owner SOUTHEAST UNIV
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