Introducing a new shimming method based on combination of axial and radial Halbach arrays to have a uniform flux density for a low-field portable MRI system

IF 1.4 4区工程技术 Q2 ENGINEERING, MULTIDISCIPLINARY

Scientia Iranica Pub Date : 2023-08-08 DOI:10.24200/sci.2023.58266.5647

M. Shiravi, B. Ganji

引用次数: 0

Abstract

Nowadays, Halbach magnets serve different purposes in electrical machine designs by offering different structures. These structures can be used to shim (improve the inhomogeneity) of new static fields in the magnetic resonance imaging (MRI) system. The shimming method proposed here uses axial and radial Halbach arrays. The inhomogeneity and average field is obtained at a constant diameter of spherical volume. Using the FE Maxwell software, different topologies are evaluated and the best structure is then selected and optimized. The optimum structure is manufactured and all issues related to the construction are explained in details. Comparison between simulation and experimental results shows the effectiveness of the proposed idea.

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介绍了一种基于轴向和径向哈尔巴赫阵列组合的低场便携式磁共振成像系统均匀磁通密度的新方法

如今，哈尔巴赫磁铁通过提供不同的结构在电机设计中服务于不同的目的。这些结构可用于在磁共振成像(MRI)系统中填充(改善不均匀性)新的静态场。本文提出的摆振方法采用轴向和径向哈尔巴赫阵列。在一定直径的球形体积下，得到了非均匀场和平均场。利用有限元Maxwell软件，对不同的拓扑结构进行了评估，选择并优化了最佳结构。制作了最佳结构，并详细说明了与施工有关的所有问题。仿真结果与实验结果的对比表明了该方法的有效性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Scientia Iranica 工程技术-工程：综合

CiteScore

2.90

自引率

7.10%

发文量

审稿时长

2 months

期刊介绍： The objectives of Scientia Iranica are two-fold. The first is to provide a forum for the presentation of original works by scientists and engineers from around the world. The second is to open an effective channel to enhance the level of communication between scientists and engineers and the exchange of state-of-the-art research and ideas. The scope of the journal is broad and multidisciplinary in technical sciences and engineering. It encompasses theoretical and experimental research. Specific areas include but not limited to chemistry, chemical engineering, civil engineering, control and computer engineering, electrical engineering, material, manufacturing and industrial management, mathematics, mechanical engineering, nuclear engineering, petroleum engineering, physics, nanotechnology.