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A Multi-Shot Diffusion Weighted Magnetic Resonance Imaging Method Based on Data Consistency

A technology of magnetic resonance imaging and diffusion weighting, which is applied in the direction of using nuclear magnetic resonance imaging system for measurement, magnetic resonance measurement, and measurement of magnetic variables. It can solve problems such as low signal-to-noise ratio, complex tissue structure, and difficulties, and achieve stable image quality. , improve image quality, and avoid mismatch problems

Active Publication Date: 2021-03-12
ALLTECH MEDICAL SYST
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Problems solved by technology

For clinical applications, it is very difficult to obtain high coil sensitivity in the case of low signal-to-noise ratio and complex tissue structure.

Method used

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  • A Multi-Shot Diffusion Weighted Magnetic Resonance Imaging Method Based on Data Consistency
  • A Multi-Shot Diffusion Weighted Magnetic Resonance Imaging Method Based on Data Consistency
  • A Multi-Shot Diffusion Weighted Magnetic Resonance Imaging Method Based on Data Consistency

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Embodiment Construction

[0048] In order to make the objects, technical solutions and advantages of the present invention, the present invention will be described in further detail below with reference to the accompanying drawings.

[0049] Step 101: Collect multi-channel pre-scan data, the multi-channel pre-scan data is a full sampled K spatial data. A multi-channel receiving coil receives data. The acquisition data can be derived from a variety of scan sequences, which is recommended to use the echo plane sequence scan with the dispersion weighting imaging. The data size of the scan can be expressed as: N x * N y * N c . Among them, N x Represents the number of lines collected, N y Represents the number of data, n c Represents the number of receiving channels.

[0050] Step 102: A volumetric core based on the data consistency is generated based on the multi-channel pre-scan data. The self-calibration data comes from the center position of the multi-channel data collected in the above steps, and the data...

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Abstract

The invention discloses a multi-excitation diffusion weighted magnetic resonance imaging method based on data consistency, comprising: collecting multi-channel pre-scan data; generating a convolution kernel based on data consistency according to the multi-channel pre-scan data; Diffusion-weighted magnetic resonance imaging data of multiple excitations; calculating reconstruction data according to the convolution kernel and the diffusion-weighted magnetic resonance imaging data of each excitation; synthesizing the reconstruction data to obtain a composite image; updating the Synthesize the image above to obtain an updated image; check whether the iteration reaches the predetermined condition; if the iteration reaches the predetermined condition, the iteration is terminated; if the iteration does not reach the predetermined condition, perform phase recovery on the updated image. The technical solution provided by the present invention does not rely on navigation echo data for motion correction, nor does it depend on the coil sensitivity in the image domain, so the image sampling efficiency can be improved and a relatively stable reconstructed image can be obtained.

Description

Technical field [0001] The present invention relates to the field of magnetic resonance imaging, and more particularly to multiple excitation imaging methods based on data consistency. Background technique [0002] Magnetic resonance imaging techniques are a technique of imaging using a magnetic resonance phenomenon of hydrogen protons. The human body contains a single proton atomic nucleus, such as a widely existing hydrogen atom core, and its proton has spin movement. Spin motion of the charged nuclear nucleus is physically similar to a separate small magnet, and is randomly with the directional distribution of these small magnets under the influence of external conditions. When the body is placed in an external magnetic field, these small magnets will rearrange the magnetic lines of the external magnetic field, specifically: arranged in two directions parallel to or reversely parallel to the external magnetic field magnetores, the above-described parallel abutment magnetic fie...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R33/56
CPCG01R33/56G01R33/56341
Inventor 朱高杰罗海吴子岳周翔刘霞王超陈梅泞
Owner ALLTECH MEDICAL SYST
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