低頻電磁熱系統應用於腫瘤熱治療已有多年的研究，其中深度磁場的設計是為長久以來主要課題與難處，若是磁場作用距離不足便無法針對位處人體深層腫瘤作有效治療，所以本深度磁場之改良型電磁加熱線圈設計就是為改善這問題而所作的研究，其主要思考方向是藉由線圈結構的改良來強化磁場，更進一步的提高磁場深度與加熱效能。本論文之目的是為探討螺線管線圈匝長比與深度磁場間的關係，藉由有限元素分析法模擬其磁場分布，並實際繞製不同匝長比線圈作加熱實驗，比較實測數值驗證線圈加熱深度與能力，結果顯示高匝長比線圈有更強的加熱效果，所以提高匝長比來提升線圈效能在此驗證是為可行。本論文研究結果可做為電磁加熱線圈設計之參考。

The application of low-frequency electromagnetic thermal system to tumor thermotherapy has been studied for years, where the design of deep magnetic field applicator has long been the key issue and dilemma. A needle with insufficient functioning distance for magnetic field could not effectively treat a tumor deeply in a human body. The improved electromagnetic heating coil with deep magnetic field is designed to resolve such a problem. The magnetic field is reinforced by the improvement of coil structure so as to enhance the magnetic field depth and the heating efficiency. Aiming at discussing the relationship between the turn density of solenoid coil and the deep magnetic field, finite element analysis (COMSOL™) is applied to simulate the magnetic field distribution. The coil with distinct turn density is made for the heating experiments, and the measured values are compared to verify the heating depth and ability of the new designed coils. The results show that coils with high turn-length ratio present heating effects. The research results could be the reference for the design of various electromagnetic heating coils.

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