Method of suppressing water signal and enhancing metabolite signal by adjusting excitation signal frequency band center frequency and receiving bandwidth in mrs imaging method

A technology of signal suppression and signal enhancement, which is applied in the direction of using nuclear magnetic resonance imaging system for measurement, using magnetic variable measurement, instruments, etc. Enhanced effect of metabolite signaling

Active Publication Date: 2021-07-16
GIL MEDICAL CENT +1
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Problems solved by technology

The method of enhancing the material signal by modifying the MRS shooting variables increases the number of shooting repetitions or increases the unit size of the shooting area, but this method has the disadvantages of increasing each shooting time and weakening the spatial resolution of the acquired data
The method of using data post-processing to enhance the material signal has the method of using an apodization filter, but this method has the disadvantage of weakening the frequency resolution of the acquired data

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  • Method of suppressing water signal and enhancing metabolite signal by adjusting excitation signal frequency band center frequency and receiving bandwidth in mrs imaging method
  • Method of suppressing water signal and enhancing metabolite signal by adjusting excitation signal frequency band center frequency and receiving bandwidth in mrs imaging method
  • Method of suppressing water signal and enhancing metabolite signal by adjusting excitation signal frequency band center frequency and receiving bandwidth in mrs imaging method

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Embodiment Construction

[0036] Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

[0037]The resonant frequency of a specific substance in a magnetic field environment is proportional to the strength of the magnetic field and proportional to the gyromagnetic constant of the reference substance. In the case of hydrogen nucleus MRS, the reference substance is TMS (Tetramethylsilane, tetramethylsilane), and the resonance frequency difference between TMS and a specific substance of interest can be expressed in Hz or PPM (part per million, parts per million).

[0038] In the case of using a PPM unit other than Hz, even if the main magnetic field changes to 1T, 1.5T, 3T, and 7T in the hydrogen nucleus MRS, the resonance frequency of the PPM unit of TMS is always 0PPM regardless of this, and the PPM unit of water resonates The frequency is always 4.7PPM. Therefore, when the unit of PPM is used, the difference between the resonance frequency of ...

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Abstract

The invention discloses a method for suppressing water signals and enhancing metabolite signals by adjusting the central frequency and receiving bandwidth of excitation signal frequency bands in magnetic resonance spectroscopy (MRS) imaging technology. According to an embodiment of the water signal suppression and metabolite signal enhancement method, an excitation signal adjusted to have a center frequency lower than the resonance frequency of water is applied, and the size of the receiving bandwidth is adjusted to match the resonance frequency of the water and the resonance frequency of the water. The center frequency difference is the same.

Description

technical field [0001] The present invention relates to a method for suppressing water signals and enhancing metabolite signals by adjusting the center frequency and receiving bandwidth of the excitation signal frequency band in MRS imaging technology, more specifically, relates to a method for MRS imaging technology without applying additional In the case of a gradient magnetic field or an additional RF signal (radio frequency signal), the water signal is suppressed and the metabolite signal is enhanced by only adjusting the center frequency and receiving bandwidth of the excitation signal. Background technique [0002] Since MRI imaging technology realizes images based on water signals, the received water signals are very important information. The characteristic information is not only worthless but also reduces the resolution of the information of other substances of interest that is really needed, so the water signal needs to be removed to the greatest extent, and the s...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R33/36G01R33/32G01R33/54G01R33/48
CPCG01R33/4608G01R33/4838G01R33/485
Inventor 崔尚汉丁俊荣
Owner GIL MEDICAL CENT
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