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Method and device for acquiring echoes of magnetic resonance elastography

A magnetic resonance elasticity and acquisition method technology, applied in the field of magnetic resonance elastography and medical equipment, can solve the problems of long MRE scan time and low signal-to-noise ratio, shorten the scan time, improve the signal-to-noise ratio, and avoid troubles

Active Publication Date: 2014-10-01
GE MEDICAL SYST GLOBAL TECH CO LLC
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a new echo acquisition method for magnetic resonance elastography, which can improve the signal-to-noise ratio and reduce the scan time of MRE, so as to solve the problem that the MRE scan time is too long and the signal-to-noise ratio is too long in the prior art. not high problem

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  • Method and device for acquiring echoes of magnetic resonance elastography
  • Method and device for acquiring echoes of magnetic resonance elastography
  • Method and device for acquiring echoes of magnetic resonance elastography

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Embodiment Construction

[0021] The present invention will be further described below in conjunction with accompanying drawing.

[0022] For simplicity, some technical features known to those skilled in the art are omitted from the following description.

[0023] image 3 Steps that a method for magnetic resonance elastography echo data acquisition may include are shown.

[0024] Step 301 is to set multiple data collection time periods on the data collection gradient axis.

[0025] Such as Figure 4 As shown, it is assumed that x, y, and z are the gradient axes in magnetic resonance elastography, and the x-axis is the readout gradient direction, that is, the x-axis is the data acquisition gradient axis, the y-axis is the phase encoding direction, and the z-axis is the layer selection gradient direction. The low-frequency shear wave is represented by a sine wave 202 in the figure, and the repetition time TR of the pulse sequence is set to be twice the period of the sine wave 202 . After the existi...

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Abstract

The invention discloses a method and a device for acquiring echoes of magnetic resonance elastography. The method includes setting a plurality of data acquisition periods on a data acquisition gradient axis. The method and the device for acquiring the echoes of magnetic resonance elastography have the advantages that idle time which is not utilized in the prior art can be sufficiently utilized, accordingly, the scanning time can be shortened, and the signal-to-noise ratio of echo signals can be increased.

Description

technical field [0001] The invention relates to the technical field of medical equipment, in particular to the technical field of magnetic resonance elastography. Background technique [0002] The basic principle of magnetic resonance elastography (MRE) is to use magnetic resonance technology to detect the particle displacement of tissues or organs in the body under the action of external force. By adding a set of excitation devices that generate mechanical motion to the magnetic resonance imaging (MRI) equipment, the excitation device generates low-frequency shear waves on the body surface, as long as the motion-sensitive gradient pulse is applied on the x, y or z axis of the gradient field sequence, the periodic displacement in the medium caused by the shear wave will cause the received signal to produce a periodic phase shift, and based on this, the distribution map of the elastic coefficient of each point inside the tissue or organ (ie, the elastic map ), thus serving a...

Claims

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Application Information

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IPC IPC(8): A61B5/055
Inventor 吴冰赖永传
Owner GE MEDICAL SYST GLOBAL TECH CO LLC
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