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Antenna design for microwave hepatic ablation using an axisymmetric electromagnetic model

2006; BioMed Central; Volume: 5; Issue: 1 Linguagem: Inglês

10.1186/1475-925x-5-15

1475-925X

John M Bertram, Deshan Yang, Mark Converse, John G. Webster, David M. Mahvi,

Microwave Imaging and Scattering Analysis

Abstract Background An axisymmetric finite element method (FEM) model was employed to demonstrate important techniques used in the design of antennas for hepatic microwave ablation (MWA). To effectively treat deep-seated hepatic tumors, these antennas should produce a highly localized specific absorption rate (SAR) pattern and be efficient radiators at approved generator frequencies. Methods and results As an example, a double slot choked antenna for hepatic MWA was designed and implemented using FEMLAB™ 3.0. Discussion This paper emphasizes the importance of factors that can affect simulation accuracy, which include boundary conditions, the dielectric properties of liver tissue, and mesh resolution.