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Microwave thermal ablation (MWA), which heats tumors, by a micro coaxial antenna, to induce coagulative necrosis is a promising alternative to treat cancer. An antenna can cover ~3 cm2; however, bone tumors can be even bigger. This study evaluates linear, triangular, and square arrays composed of a 3-slot (TS) antenna using finite element method (FEM) to determine their thermal performance in treating bone tissue. To increase the ablation zone and improve treatment efficiency, the TS antenna arrays were tested. Different inter-antenna distances (ad), Standing Wave Ratio (SWR), maximum temperatures (Tmax), ablated tissue volumes, and thermal distributions were analyzed. The square array with ad = 15 mm had the best performance achieving a Tmax = 89.42 °C and 28.109 cm3 of ablated tissue, compared to the linear array, which ablated approximately one-third of this volume. The TS antenna arrays provide greater coverage and efficiency than the single-antenna treatments.

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Arrays of a Micro-coaxial Triple-Slot Antenna to Treat Bone Tumors: FEM Thermal Evaluation

  • 会议论文

  • 发表日期：

    2025年

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  • Juan Dionisio Merida,
  • Citlalli Jessica Trujillo-Romero,
  • Arturo Vera Hernández,
  • Lorenzo Leija-Salas,
  • Carlos Alvarado Serrano,
  • Josefina Gutiérrez Martínez

摘要

Microwave thermal ablation (MWA), which heats tumors, by a micro coaxial antenna, to induce coagulative necrosis is a promising alternative to treat cancer. An antenna can cover ~3 cm2; however, bone tumors can be even bigger. This study evaluates linear, triangular, and square arrays composed of a 3-slot (TS) antenna using finite element method (FEM) to determine their thermal performance in treating bone tissue. To increase the ablation zone and improve treatment efficiency, the TS antenna arrays were tested. Different inter-antenna distances (ad), Standing Wave Ratio (SWR), maximum temperatures (Tmax), ablated tissue volumes, and thermal distributions were analyzed. The square array with ad = 15 mm had the best performance achieving a Tmax = 89.42 °C and 28.109 cm3 of ablated tissue, compared to the linear array, which ablated approximately one-third of this volume. The TS antenna arrays provide greater coverage and efficiency than the single-antenna treatments.