奈米磁粒電磁熱療是先將具有磁性的奈米粒子注射進入人體腫瘤細胞附近，使腫瘤細胞吸收這些奈米粒子，接著在體外產生一個交變磁場，對體內的奈米磁粒加熱到達45℃達到殺死腫瘤細胞的目的。奈米磁粒的加熱效果會受到顆粒大小、磁場大小與頻率的影響。由於硬體的結構限制了磁場增加的能力，因此為了能增加溫度上升的效率，本研究利用不同的電容與電感搭配設計一台可變換頻段的感應加熱器。經過實驗證明，當頻率越高奈米磁粒的溫升效果就越好。另外本次也將研究如何長時間感測大電流，進而達到長時間機台的監測，使機台可以更加被使用者所掌握，並且達到醫療儀器所要求的安全性。

In the operation of tumor hyperthermia, magnetic nanoparticles (MNP) are injected into the tumor cells. After that the induction heating system generates the alternating magnetic field to heat these MNP up to 45°C to destroy the tumor cells. The size of MNP and the strength and frequency of magnetic field all have influence on the heating efficiency. It was found that the strength changeability of the magnetic field was limited by the existed hardware configuration. This thesis utilized the combination structure of capacitance and inductance to modify the induction heating device with variable frequency to improve the efficiency of the temperature rise. Experiments showed that the higher the frequency is, the better the temperature rise effects result in. In addition, this study also developed high current sensing method to detect the several hundred-Ampere currents in the coils for the feedback control to have the medical instrument last longer and to enhance the security in operation.

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