Analysis of current and electric field distributions of coaxial-slot antenna for interstitial microwave hyperthermia

Wu, M.; Ito, Koichi; Kasai, Hideaki

doi:10.1163/156939395x00938

Cited by 6 publications

(1 citation statement)

References 16 publications

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“…Previously, several tests performed on patients with peripheral vascular desease (PVD) [2] pointed out how the production of heating in deep tissues causes vasodilation of the local vessels, thus increasing the blood flow. Moreover, heat produced by applicator coils is used in combination with conventional radiotherapy and chemotherapy for the management of tumors (loco-regional hyperthermia [4][5][6][7][8]). …”

Section: Introductionmentioning

confidence: 99%

High-Order Electromagnetic Modeling of Shortwave Inductive Diathermy Effects

Parise¹,

Cristina²

2009

PIER

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Abstract-A high-order closed-form solution for the specific absorption rate (SAR) distribution induced inside a plane geometry fatmuscle tissue by a shortwave diathermy induction coil is presented. The solution is derived starting from the complete integral expressions for the electromagnetic field components generated by a currentcarrying circular loop located horizontally above a stratified earth. It is valid in a wide frequency range, and is flexible to any multi-turn coil configuration. The spatial distribution of the SAR induced in the muscle tissue by a flat round coil is computed by using the proposed formulation, the zero-order quasi-static one, and the finite difference time domain (FDTD) method. Excellent agreement is demonstrated to exist between the results provided by the new approach and those achieved through FDTD simulations. On the contrary, the performed computations show that the zero-order solution leads to over-estimate the SAR. The performances of the round and figure-eight coil geometries are compared. Despite of what has been argued in previously published papers, it turns out that the figure-eight coil is less energetically efficient than the round one. The work in the present paper is an extension of a previous work.

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Section: Introductionmentioning

confidence: 99%

High-Order Electromagnetic Modeling of Shortwave Inductive Diathermy Effects

Parise¹,

Cristina²

2009

PIER

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A review of antenna designs for percutaneous microwave ablation

et al. 2021

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Microwave (MW) antenna is a key element in microwave ablation (MWA) treatments as the means that energy is delivered in a focused manner to the tumor and its surrounding area. The energy delivered results in a rise in temperature to a lethal level, resulting in cell death in the ablation zone. The delivery of energy and hence the success of MWA is closely dependent on the structure of the antennas. Therefore, three design criteria, such as expected ablation zone pattern, efficiency of energy delivery, and minimization of the diameter of the antennas have been the focus along the evolution of the MW antenna. To further improve the performance of MWA in the treatment of various tumors through inventing novel antennas, this article reviews the state-of-the-art and summarizes the development of MW antenna designs regarding the three design criteria.

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