Abstract The simulation and the design of radiofrequency ( RF ) coils are fundamental tasks to maximize Signal‐to‐Noise Ratio ( SNR ) in Magnetic Resonance ( MR ) applications. The estimation of coil resistance, that is, the losses within the coil conductors, which depends on tuning frequency, allows the prediction of coil performance and data SNR . At RF , the conductor resistance is increased due to the skin effect, which distributes the current primarily near the conductor surface instead of uniformly over the cross section. Moreover, the radiative losses estimation as a function of tuning frequency permits a total coil performance characterization, especially for high‐frequency tuned coils when this loss mechanism could be the dominant one. In this work we compared Finite Element Method ( FEM ) simulations with analytical calculations performed in wire loop RF coils for MR applications. Our results showed that FEM can predict the losses within the coil conductors at 5.7 MH z with a relative difference of &lt;3% compared to analytical calculation, while the relative difference increased to 58% at 127.8 MH z. Concerning the radiative losses, the relative difference between analytical formulation and FEM was lower than 3% at 5.7 MH z, and increasing to 44% at 127.8 MH z. Experimental measurements on a circular coil prototype were also performed at 85.2 MH z and 127.8 MH z, showing a better agreement with FEM simulations than with analytical calculations.

Giulio Giovannetti

Gianluigi Tiberi

Michela Tosetti

Concepts in Magnetic Resonance Part B

磁共振概念 B 部分汇集了参与设计和开发用于磁共振技术的硬件和软件的工程师和物理学家。该杂志欢迎主要来自磁共振成像 (MRI)、核磁共振 (NMR) 和电子顺磁共振 (EPR) 领域的投稿，但也鼓励提交与不太常见的磁共振成像和分析方法相关的投稿。学术界和工业界，报告仪器和计算机编程发展的最新进展，以支持医学、非医学和分析磁共振技术。

Concepts in Magnetic Resonance Part B: Magnetic Resonance Engineering brings together engineers and physicists involved in the design and development of hardware and software for magnetic resonance technology. The journal welcomes submissions primarily from the fields of Magnetic Resonance Imaging (MRI), Nuclear Magnetic Resonance (NMR), and Electron Paramagnetic Resonance (EPR), but also encourages contributions related to less common magnetic resonance imaging and analysis methods. Both academia and industry are invited to report the latest advancements in instrument and computer programming developments to support medical, non-medical, and analytical magnetic resonance technologies.

《Concepts in Magnetic Resonance Part B: Magnetic Resonance Engineering》汇集了参与设计和开发磁共振技术硬件和软件的工程师和物理学家。该杂志欢迎来自磁共振成像 (MRI)、核磁共振 (NMR) 和电子顺磁共振 (EPR) 领域的投稿，同时也鼓励与不太常见的磁共振成像和分析方法相关的研究。无论是学术界还是工业界，均可报告仪器和计算机编程发展的最新进展，以支持医学、非医学和分析磁共振技术。

Concepts in Magnetic Resonance Part B: Magnetic Resonance Engineering

Finite element method‐based approach for radiofrequency magnetic resonance coil losses estimation

Finite Element Method (FEM) simulations with analytical calculations performed in wire loop RF coils for MR applications showed that FEM can predict the losses within the coil conductors at 5.7 MHz with a relative difference of <3% compared to analytical calculation, while the relative difference increased to 58% at 127.8 MHz.

Category	Quartile
医学	4
医学, 物理化学	4
医学, 仪器仪表	4
医学, 物理原子、分子和化学物理	4
医学, 光谱学	4

Finite element method‐based approach for radiofrequency magnetic resonance coil losses estimation

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