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Fat pressing method for magnetic resonance spectrum imaging

A magnetic resonance and spectrum technology, applied in the direction of material analysis, measuring devices, instruments, etc. through resonance, can solve the problems of long calculation time, long acquisition time, complex implementation, etc., and achieve the effect of short data acquisition time

Active Publication Date: 2022-01-14
SHANGHAI JIAO TONG UNIV
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Problems solved by technology

However, the HSVD method and the UOS method based on the mixed signals of CSI and EPSI are time-consuming and require a lot of prior information such as T2 values ​​and chemical shifts of water, lipids and metabolites.
The sampling sequence of the L2 constraint method based on the spiral sampling sequence is a non-common sequence, the implementation is complex and the data obtained by using this sequence needs to be preprocessed such as gridding, and the acquisition time is long, so it is currently only used for scientific research

Method used

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  • Fat pressing method for magnetic resonance spectrum imaging
  • Fat pressing method for magnetic resonance spectrum imaging
  • Fat pressing method for magnetic resonance spectrum imaging

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Embodiment 1

[0049]A method for pressing fat for magnetic resonance spectroscopy provided by the application specifically includes the following steps:

[0050] Step 1. Collect non-fat-compressed spectral imaging data: collect the non-fat-compressed spectral imaging data using a CSI sequence.

[0051] In this embodiment, preferably, a 32-channel head coil is used for acquisition, and OVS pressure pressure is not used, and only pressure water treatment is performed. The water pressure technology adopts WET. The specific acquisition parameters are as follows: the repetition time TR is 1500ms, and the echo time TE 30ms, imaging field of view FOV 200×200mm 2 , the region of interest VOI is 80×80mm 2 , the thickness of the excitation layer is 10mm, the image size is 32×32, the number of sampling points is 2048, the spectral width is 880Hz, and the sampling interval is 0.57ms.

[0052] Step 2. Data preprocessing: perform data preprocessing on the non-fat-compressed spectral imaging data to obt...

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Abstract

The invention discloses a fat pressing method for magnetic resonance spectrum imaging. The fat pressing method comprises the following steps of: acquiring non-fat-pressing spectrum imaging data: acquiring the non-fat-pressing spectrum imaging data by adopting a CSI (Channel State Information) sequence; preprocessing the data: preprocessing the non-fat-pressing wave spectrum imaging data to obtain data XCSI; preparing masks: preparing a lipid signal mask MIipid and a metabolite signal mask Mtrain; performing double-weight signal reconstruction to obtain a double-weight signal Xdual; and performing L2 constraint reconstruction to obtain metabolite spectrum signals X with lipid signals removed. The data acquisition sequence adopted by the method is a clinical common sequence and does not need to be acquired for multiple times, so that the data acquisition time is short; lots of prior information is not needed; and lipid signals can be quickly and robustly removed, and metabolite signals can be retained.

Description

technical field [0001] The invention relates to the technical field of magnetic resonance imaging, in particular to a fat pressing method for magnetic resonance imaging. Background technique [0002] Magnetic Resonance Spectroscopic Imaging (MRSI) technology combines the spatial position information provided by Magnetic Resonance Imaging (MRI) and the metabolic compound information provided by the proton chemical shift phenomenon of Magnetic Resonance Spectroscopic (MRS) Combined, both anatomical structure information and compound information are provided. It can keenly observe the energy metabolism of tissues and organs, characterize neurological and metabolic diseases before the physiological structure of tissues or organs changes, and carry out disease diagnosis and treatment monitoring. Non-invasive detection method for quantitative analysis of biochemical environment and metabolites. [0003] The ability of MRSI technology to quantify different metabolites is due to t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N24/00
CPCG01N24/00Y02A90/30
Inventor 张志勇刘沂玲陈浩
Owner SHANGHAI JIAO TONG UNIV
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