Four-nuclide synchronous magnetic resonance imaging and image reconstruction method

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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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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