Temperature measuring method based on magnetic resonance imaging for in-vivo fat

A magnetic resonance imaging and body fat technology, which is applied in application, diagnostic recording/measurement, medical science, etc., can solve the problems of inability to guarantee accuracy, low precision, inability to take into account the accuracy and real-time of in-body measurement, etc.

Active Publication Date: 2014-12-24
HANGZHOU DINOVARUIHUAMEDTECH CO LTD
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Problems solved by technology

However, this method is greatly affected by motion artifacts, the stability of the main magnetic field, etc., and because there is no abundant hydrogen bond in water-like tissue in adipose tissue, the accuracy is low, and the accuracy of temperature measurement in body fat cannot be guaranteed.
[0014] In summary, none of the tissue temperature measurement methods in the prior art can take into account the accuracy and real-time performance of in vivo measurement

Method used

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  • Temperature measuring method based on magnetic resonance imaging for in-vivo fat
  • Temperature measuring method based on magnetic resonance imaging for in-vivo fat
  • Temperature measuring method based on magnetic resonance imaging for in-vivo fat

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Embodiment Construction

[0061] The magnetic resonance imaging-based temperature measurement method for in-body fat of the present invention will be described in detail below with reference to the accompanying drawings.

[0062] like figure 1 As shown, a magnetic resonance imaging-based temperature measurement method for body fat includes a non-real-time parameter determination stage and a real-time temperature measurement stage, wherein:

[0063] The non-real-time parameter determination phase includes the following steps:

[0064] 1-1. In the constant body temperature stage, several sets of {θ, S(θ)} data are obtained by scanning, where θ is the flip angle, and S(θ) is the signal intensity corresponding to the flip angle θ;

[0065] 1-2. Use the obtained sets of {θ, S(θ)} data, and the formula Using the least squares method to fit, the equilibrium magnetization vector m is calculated. 0 and the longitudinal relaxation rate R1 0 .

[0066] The number of groups of {θ, S(θ)} is selected according...

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Abstract

The invention discloses a temperature measuring method based on magnetic resonance imaging for in-vivo fat. The method comprises the following steps of non-real-time parameter testing phase and real-time temperature measuring phase; in the non-real-time parameter testing phase, obtaining a balance magnetizing vector and a longitudinal relaxation rate; in the real-time temperature measuring phase, scanning by a fixed scanning time and a constant turnover angle under the condition of same time interval, and calculating the temperature value corresponding to a certain time according to the scanned data and the obtained balance magnetizing vector and longitudinal relaxation rate in the non-real-time parameter testing phase. The method has the advantages that the accuracy of the existing T1 temperature measuring method based on the magnetic resonance imaging is utilized, the real-time property is improved, and the temperature measuring of in-vivo fat is quick and accurate.

Description

technical field [0001] The invention relates to the technical field of tissue temperature measurement, in particular to a magnetic resonance imaging-based temperature measurement method for body fat. Background technique [0002] Tissue thermometry is mainly used in surgical or experimental processes that use thermal effects to affect biological tissue. Tissue thermometry is mostly used to detect temperature changes and analyze thermal effects. [0003] There are many current tissue temperature measurement methods: according to the impact on the tissue, it can be divided into destructive temperature measurement and non-destructive temperature measurement; according to the real-time nature of the temperature measurement method, it can be divided into real-time temperature measurement and non-real-time temperature measurement. [0004] Detrimental temperature measurement is mainly used for in vitro tissue temperature measurement due to its greater damage to the tissue, such as...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/055A61B5/01
Inventor 訾振军孙非
Owner HANGZHOU DINOVARUIHUAMEDTECH CO LTD
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