Department of Radiology, Brigham and Women's Hospital, Boston, Massachusetts, USA.
Harvard Medical School, Boston, Massachusetts, USA.
J Magn Reson Imaging. 2018 Jan;47(1):28-43. doi: 10.1002/jmri.25761. Epub 2017 May 19.
The main risks associated with magnetic resonance imaging (MRI) have been extensively reported and studied; for example, everyday objects may turn into projectiles, energy deposition can cause burns, varying fields can induce nerve stimulation, and loud noises can lead to auditory loss. The present review article is geared toward providing intuition about the physical mechanisms that give rise to these risks. On the one hand, excellent literature already exists on the practical aspect of risk management, with clinical workflow and recommendations. On the other hand, excellent technical articles also exist that explain these risks from basic principles of electromagnetism. We felt that an underserved niche might be found between the two, ie, somewhere between basic science and practical advice, to help develop intuition about electromagnetism that might prove of practical value when working around MR scanners. Following a wide-ranging introduction, risks originating from the main magnetic field, the excitation RF electromagnetic field, and switching of the imaging gradients will be presented in turn.
5 Technical Efficacy: 1 J. Magn. Reson. Imaging 2018;47:28-43.
与磁共振成像（MRI）相关的主要风险已被广泛报道和研究；例如，日常物品可能变成抛射物，能量沉积会导致灼伤，不同的场会引起神经刺激，而巨大的噪音会导致听力损失。本文综述旨在提供引发这些风险的物理机制的直观感受。一方面，关于风险管理的实际方面，已经有很好的文献，包括临床工作流程和建议。另一方面，也有很好的技术文章从电磁学的基本原理解释这些风险。我们认为，在两者之间可能存在一个服务不足的利基市场，即在基础科学和实际建议之间，以帮助发展对电磁学的直观认识，这在围绕磁共振扫描仪工作时可能具有实际价值。在广泛的介绍之后，将依次介绍来自主磁场、激励射频电磁场和成像梯度切换的风险。
5 技术功效：1 J. 磁共振成像 2018；47：28-43.
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