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Method for measuring inversion-recovery sequence T1 under water-fat mixed system

A measurement method and system technology, which is applied in the directions of using nuclear magnetic resonance imaging system for measurement, magnetic resonance measurement, and magnetic variable measurement, etc., which can solve the problems of not being able to characterize the inherent relaxation characteristics of tissues

Pending Publication Date: 2020-02-14
广州互云医院管理有限公司
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Problems solved by technology

This apparent relaxation time is affected by the fat proton density fraction (PDFF), water tissue T 1，w , adipose tissue T 1，f However, the inherent relaxation properties of tissues cannot be characterized. In order to solve the above technical problems, a new technical solution is proposed.

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  • Method for measuring inversion-recovery sequence T1 under water-fat mixed system
  • Method for measuring inversion-recovery sequence T1 under water-fat mixed system
  • Method for measuring inversion-recovery sequence T1 under water-fat mixed system

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Embodiment Construction

[0019] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0020] A method for measuring reverse recovery sequence T1 under a water-fat mixed system, the method has the following steps:

[0021] Step 1. Collect a multi-echo image for water and fat separation, and calculate the fat proton density fraction of each pixel or ROI;

[0022] Step 2, collecting the free attenuation signal;

[0023] Step 3: After calculating the fat proton density fraction of the pixel point or ROI, multi-parameter fitting is performed on the collected free decay signal, and the relaxation characteristics of water ...

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Abstract

The invention provides a method for measuring an inversion-recovery sequence T1 under a water-fat mixed system and relates to the technology of magnetic resonance imaging. The method comprises the following steps: 1, collecting a multi-echo image, performing water-fat separation on the image, calculating the fat proton density percentage of each pixel or ROI; 2, collecting a free attenuation signal; 3, performing multi-parameter fitting on the collected free attenuation signal after the fat proton density percentage of the pixel or ROI is calculated, and calculating relaxation features of water and fat to solve the defect that traditional inversion-recovery T1 measurement cannot complete tissue T1 measurement under the situation of fat existence. The method can be used for measuring the T1of a water tissue and the T1 of fat under the situation of a sufficient proportion of a fat signal.

Description

technical field [0001] The invention relates to magnetic resonance imaging technology, in particular to a method for measuring reverse recovery sequence T1 in a water-fat mixed system. Background technique [0002] T 1 Relaxation time is an important parameter in magnetic resonance imaging, which characterizes the recovery speed of the magnetization vector along the direction of the main magnetic field in magnetic resonance imaging. Slow relaxation of free water and body fluids, T 1 A long time; and in biological tissues, because the water part is bound to the protein, the T 1 relaxation, and thus the relaxation time is typically a few hundred milliseconds. There is a balance between free water and bound water in normal tissues, but pathological conditions can disturb this balance, making T 1 The relaxation time changes. Therefore, T 1 Relaxation time can be used as an important marker to judge the progress of the disease. T 1 Quantitative technology has been widely ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/055G01R33/48G01R33/50G01R33/54
CPCA61B5/055G01R33/48G01R33/50G01R33/54
Inventor 刘新黄志炜李晓伟陈铭湘
Owner 广州互云医院管理有限公司
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