This article presents a newly developed flexible laminated copper (FLC) coil for electromagnetic thermotherapy that has several advantages over traditional hard copper coils. We study the effect of pitch (the distance between coil turns) on the heating performance of the proposed FLC coil. The flexible coil can be wound into different shapes for various purposes. However, the output power of the heating system can be substantiality affected by the coil inductance. This study is aimed at reducing coil inductance by changing the original flexible coil diameter and pitch in order to enhance the output power of a high-frequency machine, improve treatment, and meet the actual heating requirements. The results of the experiments show that the temperature is six times better when using the flexible coil compared with when using the traditional hard copper coil, where adjusting the coil pitch can increase the needle temperature by a maximum of 48.3 °C in pork liver tissue. In addition, this study simulates the distribution of the magnetic field of the flexible coil via a finite element analysis and explores the coil design and heating effect of metal needle heating and liver tissue ablation. The improved features of this proposed method are threefold: 1) the flexible coil can be used to treat different zones of the human body; 2) the flexible coil exhibits better heating performance than a hard copper coil; and 3) the coil inductance is lowered, and the power is improved, which, in turn, leads to better treatment and meets the actual heating requirements.

中文翻译：

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柔性感应线圈节距对热疗针加热性能的影响

本文介绍了一种新开发的用于电磁热疗的柔性叠层铜 (FLC) 线圈，与传统的硬铜线圈相比，它具有多项优势。我们研究了节距（线圈匝之间的距离）对所提出的 FLC 线圈的加热性能的影响。柔性线圈可以缠绕成不同的形状用于各种用途。然而，加热系统的输出功率会受到线圈电感的显着影响。本研究旨在通过改变原有的柔性线圈直径和节距来降低线圈电感，以提高高频机的输出功率，改善处理，满足实际加热要求。实验结果表明，与使用传统硬铜线圈相比，使用柔性线圈时的温度提高了六倍，其中调整线圈间距可以使猪肝组织中的针温度最高提高48.3°C。此外，本研究通过有限元分析模拟了柔性线圈的磁场分布，探讨了金属针加热和肝脏组织消融的线圈设计和加热效果。该方法的改进特点有三个：1）柔性线圈可用于治疗人体的不同部位；2）柔性线圈比硬铜线圈具有更好的加热性能；3）降低线圈电感，提高功率，反过来，