Enhancing microwave ablation efficiency with segmented power strategy

Abstract

Microwave ablation is a highly efficacious method of treating cancer that employs electromagnetic radiation falling within the microwave spectrum. While it is highly effective in managing small to medium sized tumors, it demonstrates certain restrictions when applied to larger tumors. A network partition structure has been constructed to partition the tumor and its neighboring regions. A dynamic simulation has been facilitated through the establishment of a bidirectional coupling model between temperature and electromagnetic fields within the tissue, which was achieved through the design of dependency functions for tissue characteristics and temperature. A strategy for regulating the output of electromagnetic wave energy is presented: segmented microwave power control. The work, utilizing COMSOL Multiphysics simulation software, investigates the characteristics of electromagnetic propagation in the context of tissue properties and electromagnetic energy. Approaches to augment the efficiency of tissue energy absorption, broaden the scope of ablation, and diminish carbonization regions are delineated, thereby providing a theoretical foundation for large-area microwave ablation treatment with a single antenna.