Abstract Most liver tumors are non-surgical and require other treatments. Another non-surgical treatment for these tumors is the microwave technique. In this study, heat distribution and destruction of cancerous tissue in the liver using microwaves have been studied numerically. For this purpose, a microwave-generating antenna is used which is inserted into the position. By generating waves, the tumor cells become very hot and die. This procedure is performed to treat small liver lesions. It is sometimes used as a complementary treatment after surgery or chemotherapy. Frequency and power change in ranges 1.45 GHz ≤ f ≤ 8.45 GHz and 10 W ≤ P ≤ 40 W, respectively. The governing equations are solved with the help of the finite element method (FEM). Temperature distribution, degradation factor, specific absorption rate (SAR), and current density (due to the magnetic field) parameters are obtained at various frequencies and powers. The results show that each frequency has its performance so that low frequencies are more suitable for teardrop-shaped tumors or elongated appendages and high frequencies are more suitable for spherical-shaped tumors in deep areas. Besides, the destruction rate at higher frequencies is slower, but the process can be greatly increased by using high power. The highest local SAR occurs at 4.45 GHz.

中文翻译：

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考虑到热量控制，连接到电源的天线通过微波产生磁场以破坏肝脏中的受损组织

摘要 大多数肝脏肿瘤是非手术的，需要其他治疗。这些肿瘤的另一种非手术治疗是微波技术。在这项研究中，使用微波对肝脏癌组织的热量分布和破坏进行了数值研究。为此，使用插入该位置的产生微波的天线。通过产生波，肿瘤细胞变得非常热并死亡。执行此程序以治疗小的肝脏病变。它有时用作手术或化疗后的补充治疗。频率和功率分别在 1.45 GHz ≤ f ≤ 8.45 GHz 和 10 W ≤ P ≤ 40 W 范围内变化。在有限元方法 (FEM) 的帮助下求解控制方程。温度分布、降解因子、比吸收率 (SAR)、和电流密度（由于磁场）参数在各种频率和功率下获得。结果表明，每个频率都有其表现，低频更适合泪滴状肿瘤或细长的附属器，高频更适合深部球形肿瘤。此外，在较高频率下的破坏速度较慢，但​​使用高功率可以大大提高该过程。最高的本地 SAR 出现在 4.45 GHz。较高频率下的破坏速度较慢，但​​使用高功率可以大大提高该过程。最高的本地 SAR 出现在 4.45 GHz。较高频率下的破坏速度较慢，但​​使用高功率可以大大提高该过程。最高的本地 SAR 出现在 4.45 GHz。