New challenges and opportunities for low-field MRI

Esteban Anoardo , Gonzalo G. Rodriguez
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引用次数: 1

Abstract

In this manuscript we deal with recent advances in low-field Magnetic Resonance Imaging (MRI). The development of low-cost MRI solutions allowing portability and trustable diagnosis is a hot topic worldwide by these days. We analyze basic technical issues of recent examples of fixed-field instruments operating at low-field. Then we discuss pros and cons of the pre-polarized approach, from both physical and technical perspectives. Permanent magnet and electromagnet technology are confronted. Finally, magnetic field-cycling is introduced as an alternative MRI technique, where field-dependent experiments can be exploded for the development of new contrast mechanisms that are not feasible for fixed-field MRI instruments. As field cycled machines usually deals with switched currents in electromagnets, magnetic field instability and inhomogeneity are the main limiting factors affecting image quality. We finalize this manuscript discussing how it turns possible to overcome these limitations, thus opening new possibilities for the development of cost effective MRI technology.

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低场MRI的新挑战与新机遇
在这篇文章中,我们讨论了低场磁共振成像(MRI)的最新进展。低成本核磁共振解决方案的发展,使便携性和可信赖的诊断是当今世界的热门话题。分析了近年来固定场仪器在低场运行的基本技术问题。然后,我们从物理和技术的角度讨论了预极化方法的利弊。永磁体技术和电磁体技术。最后,介绍了磁场循环作为一种替代的MRI技术,其中磁场相关的实验可以爆发,以开发新的对比机制,这在固定场MRI仪器中是不可行的。由于磁场循环电机通常处理电磁铁中的开关电流,磁场的不稳定性和不均匀性是影响图像质量的主要限制因素。我们最终确定这篇手稿,讨论如何克服这些限制,从而为开发具有成本效益的MRI技术开辟新的可能性。
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