MRI t2 image imaging method

A nuclear magnetic resonance and image imaging technology, applied in magnetic resonance measurement, measurement of magnetic variables, measurement of magnetic variables, etc., can solve problems such as inability to apply

Active Publication Date: 2021-05-21
SHANGHAI EAST HOSPITAL
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the existing T2mapping image acquisition cannot be applied to these parts

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Embodiment Construction

[0039] Such as figure 1 As shown, it is a flow chart of the method of the embodiment of the present invention, and the nuclear magnetic resonance T2 image imaging method of the embodiment of the present invention includes the following steps:

[0040] Step 1. Perform pulse sequence setting, and the pulse sequence adopts a fast spin echo sequence.

[0041] The fast spin echo sequence is a single shot fast spin echo.

[0042] The fast spin echo sequence includes: one excitation radio frequency pulse for excitation and multiple subsequent refocusing radio frequency pulses for flipping and refocusing, each refocusing radio frequency pulse corresponds to a spin echo, each of the Spin echoes form one of the echo signals that are detected.

[0043] The excitation radio frequency pulse is a radio frequency pulse with an angle of 70°-120° to invert the magnetization vector.

[0044] Each of the refocusing radio frequency pulses is a radio frequency pulse that reverses the magnetizat...

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Abstract

The invention discloses a nuclear magnetic resonance T2 image imaging method provided by the invention, which includes the following steps: Step 1, setting a pulse sequence, and the pulse sequence adopts a fast spin echo sequence. Step 2: Carry out nuclear magnetic resonance test and collect echo signals in the echo chain; the number of echo signals is required to cover the signal intensities at different time points in the transverse relaxation of the measured substance. Step 3, taking the corresponding signal strengths at different time points as K-space data and performing image reconstruction. Step 4: Obtain the MR signal intensity of each excited voxel in the position space by Fourier transforming the image data in the K space. Step five, calculating the T2 value of each excited voxel. The invention can reduce the scanning time and increase the scanning speed, and is suitable for the inspection of autonomous moving organs.

Description

technical field [0001] The invention relates to a nuclear magnetic resonance imaging (MRI) method, in particular to a nuclear magnetic resonance transverse relaxation time constant (T2) image imaging method. Background technique [0002] Nuclear magnetic resonance imaging technology, also known as magnetic resonance imaging, uses the principle of nuclear magnetic resonance to detect the emitted electromagnetic waves through an external gradient magnetic field. Based on this, it can be drawn into an image of the internal structure of the object. has been widely applied. Applying this technique to imaging the internal structures of the human body results in a medical diagnostic tool. The application of rapidly changing gradient magnetic fields has greatly accelerated the speed of nuclear magnetic resonance imaging, making the application of this technology in clinical diagnosis and scientific research a reality, and greatly promoting the rapid development of medicine, neuroph...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R33/44G01R33/561
CPCG01R33/448G01R33/5615
Inventor 戴工华
Owner SHANGHAI EAST HOSPITAL
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