High-quality magnetic resonance image synthesis method

A technology of magnetic resonance image and synthesis method, which is applied in the direction of using a nuclear magnetic resonance imaging system for measurement, magnetic resonance measurement, measurement of magnetic variables, etc. Quantitative tissue parameter measurement errors, doubts about the accuracy of synthetic magnetic resonance images, etc., to promote practical application, improve tissue contrast, and promote detection effects.

Active Publication Date: 2019-06-28
ZHEJIANG UNIV
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Problems solved by technology

In this scenario, synthetic MRI images can only achieve similar effects to MRI images obtained by conventional scanning.
In addition, due to errors in the measurement of quantitative tissue parameters by MRI
If the difference in quantitative parameters of different tissues cannot be significantly greater than the measurement error, the accuracy of the synthesized MRI image will be questioned
Therefore, the existing synthetic magnetic resonance images cannot be significantly better than conventional clinical scan images in terms of contrast effect and accuracy, which greatly limits the further practical application of this technology in clinical practice.

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  • High-quality magnetic resonance image synthesis method

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[0030] In order to enable those skilled in the art to better understand the technical solutions in the application, the present invention will be further described below in conjunction with the accompanying drawings. The calculation of the synthetic magnetic resonance image of the SE sequence is taken as an example. But this is only a part of the embodiments of the present application, not all embodiments. Based on the specific embodiments described in this application, other embodiments obtained by other persons in the art without making creative efforts should fall within the scope of the present invention.

[0031] Preferred embodiments of the present invention are described below with reference to the accompanying drawings.

[0032] Generally speaking, in the calculation of the synthetic magnetic resonance image, the present invention expands the value range of TE and TR to the negative interval, and expands the contribution of the PD parameter to a negative power, thereb...

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Abstract

The invention discloses a high-quality magnetic resonance image synthesis method. The method comprises the steps that the value range of echo time TE and sweeping repetition time TR in a magnetic resonance signal generation formula is expended to a negative number interval, and the contribution of proton density PD parameters is expanded to negative power. According to the method, the influence ofmeasurement errors of quantitative tissue parameters of magnetic resonance on the tissue contrast results of synthetic magnetic resonance images can be effectively reduced, and the tissue contrast ofthe synthetic magnetic resonance images can be significantly improved. By means of the method, the imaging quality of synthetic magnetic resonance can be significantly improved, and the detection effect in neuroscience and clinical pathological changes is promoted. The method is expected to improve the imaging quality of the synthetic magnetic resonance and promote its detection effect in neuroscience and clinical pathological changes finally.

Description

technical field [0001] The invention relates to the field of magnetic resonance imaging technology and image processing, in particular to a high-quality magnetic resonance image synthesis method. Background technique [0002] Synthetic magnetic resonance imaging refers to the method of using quantitative magnetic resonance scanning analysis to obtain the magnetic resonance quantitative tissue parameters such as T1, T2, and PD of each voxel, and then using the magnetic resonance signal formula to generate various common magnetic resonance images with different contrasts. For example, formula (1) represents a signal formula of a spin echo (Spin Echo, SE) sequence. In the formula (1), S represents the magnetic resonance signal, PD (Proton Density) represents the proton density, T1 represents the longitudinal relaxation time, T2 represents the transverse relaxation time, TR (Repetition Time) represents the scan repetition time, TE (Echo Time) represents echo time. PD, T1, and ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/055G01R33/58
CPCG01R33/50G01R33/5602G01R33/5608A61B5/055
Inventor 何宏建李军曹笑之丁秋萍钟健晖
Owner ZHEJIANG UNIV
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