A multi-slot coaxial microwave antenna for liver tumor ablation.

A multi-slot coaxial microwave antenna for liver tumor ablation.
Phys Med Biol. 2018 Aug 13;:
Authors: Ge M, Jiang H, Huang X, Zhou Y, Zhi D, Zhao G, Chen Y, Wang L, Qiu B
Abstract
This paper presents a multi-slot coaxial antenna with a pi impedance matching network for liver tumor ablation. In order to reduce damage to surrounding healthy tissues during ablation, a multi-slot radiating part was designed to produce a near-spherical heating zone with greatly increased possibility of conformal treatment. A pi impedance matching network part was designed to match the feeding transmission line and antenna without increasing antenna size. The reflection coefficient, ablation zone shape, specific absorption rate, and temperature were determined by using a finite element electromagnetic simulation COMSOL. Experimental validations were carried out to evaluate the proposed antenna. Both simulation and experimental results showed that the proposed antenna has the ability for liver tumor ablation, which offers faster heating rates in the heating center and more localized heating distribution than the conventional single-slot antenna.
PMID: 30102247 [PubMed - as supplied by publisher]

Source: Physics in Medicine and Biology - August 13, 2018 Category: Physics Authors: Ge M, Jiang H, Huang X, Zhou Y, Zhi D, Zhao G, Chen Y, Wang L, Qiu B Tags: Phys Med Biol Source Type: research