Monopoles for microwave catheter ablation of heart tissue

Author

Labonte, S. ; Ali, H.O. ; Roy, Langis

Author_Institution

Dept. of Eng., Ottawa Univ., Ont., Canada

fYear

1995

fDate

16-20 May 1995

Firstpage

303

Abstract

The finite-element method is applied to the study of monopole antennas for microwave catheter ablation. Three geometries are considered: open-tip, dielectric-tip and metal-tip. Calculations are made for the magnetic field, the reflection coefficient and the power deposition pattern of the antennas immersed in normal saline. The theoretical results agree with measurements performed on prototypes. The differences between the antennas suggest that the metal-tip monopole best fulfills the requirements of catheter ablation of the endocardium. Optimal dimensions for a metal-tip monopole are also presented.<>

Keywords

biomedical equipment; cardiology; finite element analysis; hyperthermia; microwave antennas; monopole antennas; radiation therapy; dielectric-tip; endocardium; finite-element method; geometries; heart tissue; magnetic field; metal-tip; microwave catheter ablation; monopole antennas; monopoles; normal saline; open-tip; power deposition pattern; reflection coefficient; Catheters; Dielectrics; Finite element methods; Geometry; Heart; Magnetic field measurement; Microwave antennas; Microwave theory and techniques; Reflection; Reflector antennas;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Symposium Digest, 1995., IEEE MTT-S International

Conference_Location

Orlando, FL, USA

ISSN

0149-645X

Print_ISBN

0-7803-2581-8

Type

conf

DOI

10.1109/MWSYM.1995.406046

Filename

406046