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Magnetic resonance K-space data correction method

A data correction and k-space technology, which is applied in the computer field, can solve the problems such as the lack of detailed description of the K-space data splicing method and the lack of detailed description of the magnetic resonance receiving gain difference and phase difference correction problem.

Active Publication Date: 2021-06-25
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

However, the above technology does not elaborate on the K-space data splicing method, nor does it elaborate on the correction of the gain difference and phase difference of the magnetic resonance reception

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  • Magnetic resonance K-space data correction method
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  • Magnetic resonance K-space data correction method

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[0042] In order to facilitate those skilled in the art to understand the technical content of the present invention, the content of the present invention will be further explained below in conjunction with the accompanying drawings.

[0043] In the sequence scanning data acquisition, each receiving gain control parameter is adjusted once, then a sequence scanning is performed to obtain a set of K space raw data, and three sets of K with receiving gain parameters of τdB, τ-6dB and τ-12dB respectively Spatial data Kτ, Kτ-6, Kτ-12. By analyzing the gain difference and phase difference of these three sets of data, a data space of a spliced ​​image is constructed, and an image can be obtained by Fourier transforming the spliced ​​data space. The system execution process is as follows: figure 1 shown.

[0044] The invention proposes a method for splicing K-space data obtained under different receiving gain parameters into a piece of K-space data, and a method for normalizing the K-...

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Abstract

The invention discloses a magnetic resonance K-space data correction method, which is applied to the field of magnetic resonance K-space data processing, and aims at solving the problem that a specific implementation method for K-space data splicing is lacked in the prior art.Gain and phase compensation are carried out on the spliced K-space data. The method specifically comprises the following steps of normalizing K space data under three different gain parameters to the same receiving gain level through gain difference correction and compensation, and carrying out phase difference correction and compensation on the K space data after gain compensation.

Description

technical field [0001] The invention belongs to the technical field of computers, and in particular relates to a magnetic resonance K-space data processing technology. Background technique [0002] Among the echo signals of all phase-encoded lines in MRIK space, there are obvious differences in the echo signal amplitude of each phase-encoded line, and the signal amplitude of the larger phase-encoded line is smaller than that of the smaller phase-encoded line. During the process, setting a fixed receiving gain on the premise of ensuring that the points with the largest echo amplitudes of all phase-encoded lines in the entire K-space do not overflow will cause the overall echo signal to fail to reach the maximum signal dynamic range. Mark A et al. and C.H.OH et al. found that without changing the circuit of the magnetic resonance receiver, setting the phase encoding lines in different regions of K space to different receiving gain parameters not only ensures the accuracy of th...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R33/48G01R33/58
CPCG01R33/4818G01R33/58
Inventor 吴林刘杭余洁张涛尧德中解玺洁胡霞飞
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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