A numerical model of a microwave antenna system for transcatheter ablation was constructed and its design features were characterized and confirmed by return loss measurements.
This study provides a validated numerical model for optimizing microwave catheter designs for cardiac ablation.
A microwave antenna system for transcatheter ablation of cardiac tissue is investigated. A numerical model based on the finite-difference time-domain method incorporating a Gaussian pulse excitation has been constructed and frequency domain electric and magnetic fields are obtained through Fourier transformation. Results are presented for a coaxial line fed monopole catheter which is modified by the successive inclusion of a Teflon sheath outer coating, a terminating disk at the tip of the antenna, a sleeve choke, and a high dielectric constant cylinder surrounding the monopole antenna. The effects of these design features are characterized in terms of specific absorption rate (SAR) and return loss (RL). Numerical calculations are confirmed by comparing with the RL measurement of a Teflon-coated monopole containing a disk and choke.
Nevels et al. (Wed,) conducted a other in Cardiac tissue ablation. Microwave antenna system was evaluated on Specific absorption rate (SAR) and return loss (RL). A numerical model of a microwave antenna system for transcatheter ablation was constructed and its design features were characterized and confirmed by return loss measurements.
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