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VBM3d-based magnetic resonance image reconstruction method

A magnetic resonance image and sensitivity map technology, applied in the field of magnetic resonance image reconstruction, can solve problems such as poor quality of magnetic resonance images, and achieve high accuracy, high peak signal-to-noise ratio, and good denoising effect

Active Publication Date: 2021-09-03
ZHEJIANG UNIV
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Problems solved by technology

[0005] In view of this, the present invention proposes a vBM3d-based magnetic resonance image reconstruction method with high imaging quality to solve the problem of poor quality reconstruction of magnetic resonance images in the case of high-magnification acceleration sampling by the existing parallel imaging technology SENSE

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Embodiment Construction

[0028] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but the present invention is not limited to these embodiments. The present invention covers any alternatives, modifications, equivalent methods and schemes made on the spirit and scope of the present invention. In order to provide the public with a thorough understanding of the present invention, specific details are set forth in the following preferred embodiments of the present invention, but those skilled in the art can fully understand the present invention without the description of these details.

[0029] vBM3d is a video denoising method proposed by Kostadin Dabov et al. in 2007, and has been widely used in the field of video denoising.

[0030] A magnetic resonance image reconstruction method based on vBM3d, comprising the following steps:

[0031] 1) Using a magnetic resonance coil to obtain k-space data of the sample object, rearrangin...

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Abstract

The invention discloses a vBM3d-based magnetic resonance image reconstruction method, which comprises the following steps of 1) acquiring k space data of a sample object by adopting a magnetic resonance coil, rearranging the k space data to obtain time-averaged k space data, and performing coil sensitivity calculation by utilizing the time-averaged k space data to obtain a sensitivity graph, 2) carrying out downsampling on the k space data, and rearranging the k space data according to an acquisition time sequence, and 3) performing magnetic resonance image reconstruction by using the down-sampled k space data obtained in the step 2) and the sensitivity graph obtained in the step 1) as input parameters of a vBM3d-based SENSE dynamic magnetic resonance image reconstruction model. According to the method, the problem of poor image quality during high-power down-sampling of a traditional SENSE reconstructed magnetic resonance image is solved, the reconstructed image quality is high, and the application range is wide.

Description

technical field [0001] The invention relates to the field of magnetic resonance image reconstruction, in particular to a vBM3d-based magnetic resonance image reconstruction method. Background technique [0002] Magnetic resonance imaging has high soft tissue resolution, rich imaging parameters, and no ionizing radiation. It is a routine clinical examination method at present. The main disadvantage of magnetic resonance imaging is the long data acquisition time, which results in slow imaging. [0003] Dynamic MRI imaging with high spatial and temporal resolution has important clinical diagnostic value. In the process of MRI dynamic imaging, the temporal resolution and spatial resolution cannot be optimized at the same time. When the reduction factor increases, the image quality will decrease rapidly due to noise amplification and undersampling artifacts. [0004] The emergence of multi-channel acquisition technology and parallel imaging algorithms has greatly accelerated th...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R33/56G01R33/561
CPCG01R33/56G01R33/561
Inventor 陈智峰陈武凡张鞠成路利军冯衍秋徐中标
Owner ZHEJIANG UNIV
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