Utilizing a Floating Sleeve Antenna for Interstitial Microwave Hyperthermia Treatment of Superficial and Deep-seated Breast Tumors

Abstract Purpose: Breast cancer is a leading cause of mortality among women worldwide. While chemotherapy and radiotherapy are commonly used treatment modalities, they have several side effects that can negatively impact the patient. In this study, we explore the application of a floating sleeve antenna for interstitial microwave hyperthermia for breast tumors. Method: Two distinct 3D breast models were employed: a simplified semi-spherical and a highly detailed anatomical model. Both models featured superficial and deep-seated tumors. The floating sleeve antenna was inserted into the breast models, and simulations were con-ducted to assess the specific absorption rate (SAR) and temperature distribution. Results: In the simple model, the superficial tumor reached a maximum temperature of 50.7 ºC, while the deep-seated tumor maintained a uniform temperature of 48.9 ºC. In contrast, the realistic model achieved a maximum temperature of 46.2 ºC for the superficial tumor and 41.47 ºC for the deep-seated tumor within the same 15-minute treatment period. These results demonstrate the ability of the antenna to attain the desired hyperthermia temperatures (above 39 °C to 45 °C). Conclusion: microwave hyperthermia using a floating sleeve antenna has the potential to be an effective and safe alternative treatment for breast cancer with minimal side effects