吉林大学学报(信息科学版) ›› 2022, Vol. 40 ›› Issue (6): 893-897.

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基于贝叶斯的核磁共振T2谱成像方法

王 琦1 , 杜海龙1 , 高 威1 , 刁 庶2   

  1. 1. 吉林大学 通信工程学院, 长春 130012; 2. 无锡职业技术学院 控制技术学院, 江苏 无锡 214121
  • 收稿日期:2022-05-12 出版日期:2022-12-09 发布日期:2022-12-09
  • 作者简介:王琦(1988— ), 女, 长春人, 吉林大学高级工程师, 主要从事信号与信息处理及其应用研究, ( Tel) 86-13610791401(E-mail)wangqi0115@ jlu. edu. cn.
  • 基金资助:
    国家自然科学基金资助项目(42104142); 吉林省教育厅科学研究基金资助项目( JJKH20221006KJ); 吉林大学实验技术 基金资助项目(SYXM2021a002); 教育部第二批新工科研究与实践基金资助项目(E-CXCYYR20200918)

Spectral Imaging Method of Nuclear Magnetic Resonance T2 Based on Bayesian

WANG Qi 1 , DU Hailong 1 , GAO Wei 1 , DIAO Shu 2   

  1. 1. College of Communication Engineering, Jilin University, Changchun 130012, China; 2. Control Technology Institute, Wuxi Institute of Technology, Wuxi 214121, China
  • Received:2022-05-12 Online:2022-12-09 Published:2022-12-09

摘要: 为解决T2谱成像精度低, 影响检测结果的准确性的问题, 对基于贝叶斯的核磁共振T2谱成像方法进行 了研究。首先给出了NMR(Nuclear Magnetic Resonance) 信号的基本特征, 并基于贝叶斯原理, 推导了NMR信号的似然函数, 构建了T2谱成像框架。 其次, 采用改进的马尔科夫链蒙特卡洛策略, 得到T2谱及其不确定 度。最后, 通过随机构造服从多峰的混合高斯概率密度函数的T2谱模型, 验证了基于贝叶斯的核磁共振T2谱 成像方法的有效性。 该方法可应用于通信原理综合实验内容, 也可用于创新性训练实验。

关键词: 核磁共振; , T2 谱成像; , 贝叶斯

Abstract: Low-field NMR(Nuclear Magnetic Resonance) technology has been widely used in the detection of physical properties of substances due to its fast and non-destructive characteristics. To solve the problem that the imaging accuracy of T2 spectral is low, which affects the accuracy of detection results. Therefore the imaging method of NMR T2 spectral based on Bayesian is studied. Firstly, the basic characteristics of NMR signals are showen. Based on the Bayesian principle, the likelihood function of NMR signals is deduced, and the T2 spectral imaging framework is constructed. Secondly, the T2 spectrum and its uncertainty are obtained by using an improved Markov chain Monte Carlo strategy. Finally, the effectiveness of the Bayesian-based NMR Tspectral imaging method is verified by randomly constructing a T2 spectral model that obeys a multimodal mixture Gaussian probability density function. This method can be used as a comprehensive experimental content of communication principle, and can also be used as an innovative training experiment.

Key words: nuclear magnetic resonance(NMR); , imaging method of T2 spectral; , Bayesian

中图分类号: 

  • TP301. 6