Harbin Medical University

Lijiao Wang

Kai Wang

Xilin Sun

Lili Yang

Lina Wu

Chunsheng Yang

Yongyi Wu

Zhaoguo Han

Limin Zheng

Pengcheng Cheng

A phantom for multinuclear simultaneous integrated magnetic resonance imaging includes a plurality of sealed containers, where a partition I and a partition II are provided in the sealed container and intersect with each other; the partition I and the partition II divide the sealed container into a plurality of subspaces that are interconnected; a thickness of the partition I is equal to a resolution of a nuclideH, and a thickness of the partition II is γ/γtimes of the resolution of the nuclideH, where γis a gyromagnetic ratio of the nuclideH, and γis a gyromagnetic ratio of a pre-imaging nuclide X; the sealed container is filled with a mixture; and the mixture includes all pre-imaging nuclides. In the phantom, the partition I and the partition II are designed according to a ratio of gyromagnetic ratios of nuclides, and are combined with a mixture including all pre-imaging nuclides.

Phantom for multinuclear simultaneous integrated magnetic resonance imaging and application method thereof

An optimal pulse power measurement method for multinuclear simultaneous integrated magnetic resonance imaging includes the following steps: successively or simultaneously exciting multiple nuclides within a slice in a same repetition time (TR) of magnetic resonance imaging (MRI); applying, in a slice encoding gradient channel, a frequency encoding gradient in a direction opposite to a slice selection gradient, and acquiring free induction decay (FID) signals of all the nuclides; simultaneously changing shaped radiofrequency (RF) pulse power values of all the nuclides for multiple times, and acquiring multiple corresponding FID signals for each nuclide; and performing Fourier transform on the FID signals of each nuclide, selecting a spectral peak in an absolute spectrum, integrating the spectral peak for comparison, and taking a shaped RF pulse power value corresponding to a maximum signal intensity of each nuclide as an optimal shaped RF pulse power corresponding to a current TR.

Optimal pulse power measurement method and system for multinuclear simultaneous integrated magnetic resonance imaging

A magnetic resonance imaging (MRI) system and method integrating multi-nuclide synchronous imaging and spectral imaging is provided. The MRI system includes a spectral imaging module, a multi-nuclide synchronous imaging module, and a spectral reconstruction and image fusion module, where the spectral imaging module is configured to acquire a spectrum of a nuclide Nuc; the multi-nuclide synchronous imaging module is configured to perform synchronous imaging of nuclides Nuc1 . . . Nucn, where when n=1, Nucl isH; and when n>1, Nucn is a non-H nuclide; and the spectral reconstruction and image fusion module is configured to receive the spectrum of the nuclide Nuc and images of the nuclides Nuc1 . . . Nucn, and acquire spatial distribution information of compounds of the nuclide Nuc and spatial distribution information of the non-H nuclide through fusion. The system and method can synchronously acquire MR signals of different nuclides, and reconstruct and fuse non-H nuclide images.

Magnetic resonance imaging (MRI) system and method integrating multi-nuclide synchronous imaging and spectral imaging

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Harbin, China

Lijiao Wang