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A kind of magnetic resonance scanning short te imaging method and magnetic resonance scanning system

A technology of magnetic resonance scanning and imaging methods, which is applied in the fields of measuring magnetic variables, medical science, and measuring devices. It can solve problems such as resolution sacrifice and image quality impact, and achieve enhanced T1 weighting, shortened scan time, and enhanced echo signals. effect of magnitude

Active Publication Date: 2016-08-31
SHANGHAI UNITED IMAGING HEALTHCARE
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Problems solved by technology

[0006] for figure 1 For the undersampled data in K space shown in (a), since the missing data are distributed at the same end of the readout direction of the data line, in general, the symmetry of K space can only be used to complement these missing data, but this method reconstructs The image may have Gibbs artifacts; in order to suppress Gibbs artifacts, window filtering can be used, but there will be a certain sacrifice for resolution
In summary, existing methods for achieving short TE imaging can compromise image quality

Method used

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  • A kind of magnetic resonance scanning short te imaging method and magnetic resonance scanning system
  • A kind of magnetic resonance scanning short te imaging method and magnetic resonance scanning system
  • A kind of magnetic resonance scanning short te imaging method and magnetic resonance scanning system

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Embodiment Construction

[0039] In order to make the above objects, features and advantages of the present invention more clearly understood, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0040] figure 2 (a) a schematic diagram of the K-space data collected by the pulse sequence of the present embodiment, wherein the data actually collected in the K-space is represented by a solid line, and the missing data is represented by a dotted line; figure 2 (b) is the corresponding readout gradient field (G R0 ) Schematic diagram of the pulse signal waveform, because the change between the present invention and the existing short TE pulse sequence mainly lies in the change of the readout gradient field, and the change of the K-space acquisition trajectory caused by the change of the readout gradient field, so in the figure 2 Ignore slice selection gradient field, phase encoding gradient field, radio frequency pulse and oth...

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Abstract

The invention discloses a magnetic resonance scanning short TE (Time Echo) imaging method and a magnetic resonance scanning system. The method comprises the following steps for realizing short TE imaging: collecting magnetic resonance signals within the short TE so as to enable data points, which are missing due to the short TE, of an odd data line and an even data line in the phase encoding direction of a space K to be distributed to different ends of the reading-out direction of the space K; filling the data points which are missing in the space K with a parallel collection and reconstruction method; converting the data filled up in the space K into an image through Fourier transformation. Compared with the existing short TE imaging method, the magnetic resonance scanning short TE imaging method provided by the invention can avoid generating Gibbs artifacts or influence on image quality, caused by resolution sacrificing.

Description

【Technical field】 [0001] The invention relates to the technical field of Magnetic Resonance Imaging (MRI, Magnetic Resonance Imaging), in particular to a magnetic resonance scanning short TE imaging method and a magnetic resonance scanning system. 【Background technique】 [0002] The basic principle of magnetic resonance imaging is that the hydrogen atoms in human tissue have spin motion and generate magnetic moments, which can be regarded as some small magnets. At this time, when a radio frequency pulse is applied, these hydrogen atoms absorb a certain amount of energy and generate resonance, and the spin direction is deflected under the action of the radio frequency pulse, and is regularly arranged, that is, the magnetic resonance phenomenon occurs; the radio frequency pulse After disappearing, these hydrogen atoms will return to their original state. During the recovery process, energy is released and the spin direction is changed, the magnetic resonance signals generated ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B5/055G01R33/561
CPCA61B5/055G01R33/561
Inventor 翟人宽
Owner SHANGHAI UNITED IMAGING HEALTHCARE
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