A batteryless implantable radiofrequency lesioning (RFL) device powered by magnetic coupling is presented. The implant is composed of bipolar RFL electrodes, an energy-receiving coil, and a resonant capacitor circuit for maximizing the received power and providing an appropriate voltage for the electrodes. A 40-cm transmitting coil designed to wrap around the patient's body is used to generate a uniform magnetic field in a large volume so precise coil alignment is not necessary. The transmitting coil is divided to 24 segments by resonant capacitors to significantly reduce the excitation voltage to a safe level. The system was tested using ex-vivo chicken muscle tissue. Experimental results show that with a transmitting coil excitation of 1.2 A_(rms), the implant can lesion the muscle tissue by achieving a temperature of 55°C. When the excitation increased to 1.6 Arms, the tissue temperature was increased to 83°C. FEA simulation results demonstrate that the human body SAR is lower than the safety limit of 2 W kg~(-1) suggested by international guidelines when the excitation is 1.6 Arms.
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机译：提出了由磁耦合供电的无可用植入射频损伤（RFL）装置。植入物由双极RFL电极，能量接收线圈和谐振电容器电路组成，用于最大化接收功率并为电极提供适当的电压。设计用于缠绕在患者体周围的40厘米的透射线圈用于在大容量中产生均匀的磁场，因此不需要精确的线圈对准。传输线圈通过谐振电容器划分为24个段，以显着将激励电压降低到安全水平。使用前体内鸡肉肌肉组织进行测试。实验结果表明，随着透射线圈激发为1.2A_（rms），植入物可以通过实现55℃的温度而使肌肉组织病变。当激发增加到1.6臂时，组织温度升至83℃。 FEA模拟结果表明，当激发为1.6臂时，人体SAR低于国际指南建议的2 W kg〜（-1）的安全限制。
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