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Four-nuclide synchronous magnetic resonance imaging and image reconstruction method

A magnetic resonance imaging and image reconstruction technology, which is applied in the directions of using nuclear magnetic resonance imaging system for measurement, magnetic resonance measurement, and magnetic variable measurement, can solve the problems of large resolution gap, large difference, and inability to perform direct registration, etc.

Active Publication Date: 2022-01-18
INNOVATION ACAD FOR PRECISION MEASUREMENT SCI & TECH CAS +1
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Problems solved by technology

[0011] However, in the process of multi-nuclear synchronous magnetic resonance imaging, the spatially encoded gradient magnetic field acts on all nuclei at the same time, the magnetic spin ratio of different nuclides is an inherent property of the nuclei, and the difference is large, and the images collected at the same time have different fields of view and layer thicknesses. The resolution gap is large, and direct registration cannot be performed, and it is not convenient for further registration and analysis

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  • Four-nuclide synchronous magnetic resonance imaging and image reconstruction method

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Embodiment Construction

[0061] In order to facilitate those of ordinary skill in the art to understand and implement the present invention, the present invention will be described in further detail below in conjunction with the examples. It should be understood that the implementation examples described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0062] Loaded on the MRI system console that supports four-channel simultaneous transmission and reception such as figure 1 The pulse sequence shown.

[0063] A four-nuclide simultaneous magnetic resonance imaging and image reconstruction method, comprising the following steps:

[0064] Step 1. Set the inspection area FOV, layer thickness Th, and sampling matrix [M N];

[0065] Among them, M is the number of sampling points, N is the number of encoding steps in the phase encoding direction, and the inspection area FOV includes the frequency encoding direction inspection area FOVr...

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Abstract

The invention discloses a four-nuclide synchronous magnetic resonance imaging and image reconstruction method. The method comprises the steps of setting an examination area, layer thickness and a sampling matrix; setting a parameter of a radio frequency channel corresponding to each nuclide, and setting a parameter of a frequency coding gradient channel; setting parameters of a layer selection gradient channel; setting parameters of a phase coding gradient channel; starting sampling; and reconstructing the image. Signals of the four nuclides come from the same layer, the layer thicknesses of the nuclides are kept consistent, the visual fields of the frequency coding gradient directions are consistent, the apparent resolutions of the layer thicknesses, the frequency coding directions and the phase coding directions of the reconstructed four nuclide images are consistent, the pixel positions are in one-to-one correspondence, and the problem that in the multi-nuclide synchronous imaging process, the FOV difference is large due to different nuclide image layer thicknesses is solved.

Description

technical field [0001] The invention relates to the technical field of magnetic resonance imaging, in particular to a four-nuclide synchronous magnetic resonance imaging and image reconstruction method. Background technique [0002] Magnetic resonance imaging (MRI) has been widely used in preclinical research and medical diagnosis and treatment. Hydrogen nuclei exist extensively and densely in living organisms, and are used as the preferred nuclei for magnetic resonance imaging. However, non-proton imaging can provide information that cannot be obtained by proton imaging alone, and can be a useful supplement to hydrogen nuclide imaging. [0003] In traditional MRI imaging methods, multiple nuclides are imaged sequentially, that is, a series of signals of single nuclides are collected and images are reconstructed. Multiple examinations are required, and the imaging time is very long. It is difficult to keep a person in one position still for more than half an hour. Minor m...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R33/561G01R33/56
CPCG01R33/5615G01R33/5608Y02A90/30
Inventor 刘朝阳杨春升陈俊飞张志陈黎陈方冯继文
Owner INNOVATION ACAD FOR PRECISION MEASUREMENT SCI & TECH CAS
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