A floating sleeve antenna yields localized hepatic microwave ablation.

Yang, Deshan; Bertram, John M; Converse, Mark C; O'Rourke, Ann P; Webster, John G; Hagness, Susan C; Will, James A; Mahvi, David M · IEEE Trans Biomed Eng · 2006

basic_science · Level V

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Abstract

We report a novel coaxial antenna for hepatic microwave ablation. This device uses a floating sleeve, that is, a metal conductor electrically isolated from the outer connector of the antenna coaxial body, to achieve a highly localized specific absorption rate pattern that is independent of insertion depth. This floating sleeve coaxial dipole antenna has low power reflection in the 2.4-GHz IMS band. Ex vivo experiments confirm our numerical simulation results. Index Terms-Ablation, coaxial aperture antennas, finite element methods, floating sleeve, microwave heating.

Medical subject headings