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利用Monte Carlo进行MRI主磁体的优化设计
吴凯宏,武玉,张雍良
0
(中国科学院,合肥物质科学研究院,等离子体物理研究所,合肥,230031;中国科学技术大学,合肥,230026)
摘要:
磁共振成像(MRI)中的磁体系统是MRI整体装置的主体,而主磁体作为磁体系统的核心,为整个磁体系统提供基础磁场。其磁场位型、均匀性直接关系到磁体系统其它组件的设计以及最终的性能。文中提出一种利用ANSYS中的概率设计——Monte Carlo进行主磁体优化的设计方法,使得中心场区的磁场偏差从几千ppm降低到120 ppm左右。达到设计的目的.
关键词:  MRI  Monte Carlo  优化
DOI:10.13380/j.ltpl.2019.01.007
基金项目:
The Optimal Design of MRI Main Magnet By Monte Carlo Method
WU Kaihong,WU Yu,ZHANG Yongliang
(Institute of plasma physics, Chinese academy of sciences, Hefei, 230031;University of science and technology of China, Hefei, 230026)
Abstract:
The magnetic system in Magnetic Resonance Imaging (MRI) is the main body of the MRI unit, and the main magnet is the core of the magnet system, which provides the basic magnetic field for the whole magnetic system. Its magnetic field configuration and homogeneity are directly related to the design of other components of the magnet system and the ultimate performance .In this paper, we propose a design method using the probability design of ANSYS -- Monte Carlo to optimize the main magnet, and finally the magnetic field deviation in the center field can be reduced from several thousand parts per million to about 120 ppm, achieving the purpose of design.
Key words:  MRI  Monte Carlo  Optimization

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