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Low-Field Rampable Magnet for a High-Resolution MRI System

机译:高分辨率MRI系统的低磁场可倾斜磁体

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摘要

This article presents the design and experimental characterization of an electromagnet rampable up to 1 T and tailored to meet the demands of a magnetic resonance imaging (MRI) system conceived for spatial resolutions at the level of tens of microns. For high image quality, MRI requires a homogeneous magnetic field over the field of view (FoV) where the sample is imaged. We have opted for passive shimming based on optimal pole profiling and measure a relative field inhomogeneity of 71 parts per million over a spherical FoV of 20 mm diameter. Fringe-field lines are strongly confined to avoid interference with other devices. The magnet performance closely follows our expectations from numerical simulations in all of the experimental tests carried out. In addition, we present the solutions adopted for thermal management and the design of a mechanical structure to distribute the weight and integrate the platform to move the sample in and out of the magnet.
机译:本文介绍了可斜升至1 T的电磁体的设计和实验特性,并针对满足数十微米水平空间分辨率的磁共振成像(MRI)系统的要求进行了定制。为了获得高质量的图像,MRI需要在​​成像样本的视场(FoV)上形成均匀的磁场。我们选择了基于最佳磁极轮廓的无源匀场,并在直径为20 mm的球形FoV上测量了相对百万分率的相对场不均匀度,为71 ppm。边缘场线应严格限制,以避免干扰其他设备。在进行的所有实验测试中,磁体的性能都非常符合我们对数值模拟的期望。此外,我们还提供了用于热管理的解决方案以及用于分配重量并集成平台以将样品移入和移出磁体的机械结构的设计。

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  • 来源
    《IEEE Transactions on Magnetics》 |2020年第2期|1-7|共7页
  • 作者

  • 作者单位

    Tesoro Imaging SL Ciudad Politecn Innovac Valencia 46022 Spain|Univ Politecn Valencia Inst Instrumentat Mol Imaging E-46022 Valencia Spain;

    Danfysik AS DK-2630 Taastrup Denmark;

    Univ Politecn Valencia Inst Instrumentat Mol Imaging E-46022 Valencia Spain;

    Tesoro Imaging SL Ciudad Politecn Innovac Valencia 46022 Spain;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    High resolution; magnetic resonance imaging (MRI); passive shimming; rampable electromagnet;

    机译:高分辨率;磁共振成像(MRI);被动匀场;可倾斜的电磁体;

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