Title :
Antenna design for catheter-based tissue heating
Author :
Park, Sooman ; Lim, Yeongseog
Author_Institution :
Dept. of Electron. Eng., Chonnam Nat. Univ., Kwangju, South Korea
Abstract :
The work presents an improved coaxial line fed ring-slot antenna system for microwave coagulation therapy. The performance of a hyperthermia applicator is characterized by both impedance matching and specific absorption rate (SAR) distribution in the tissue of interest. First, we analyze the antenna of a conventional applicator and modify the configuration of the antenna to improve its heating characteristics, using finite difference time domain (FDTD) analysis and the finite integral method (FIM). We then calculate the return loss and SAR with the liver-equivalent phantom model at 2450 MHz. The computation results are compared with available measured values. Optimal dimensions of the applicator are also presented.
Keywords :
UHF antennas; antenna radiation patterns; finite difference time-domain analysis; hyperthermia; impedance matching; slot antennas; 2450 MHz; FDTD analysis; SAR distribution; antenna design; catheter-based tissue heating; coaxial line feed; finite difference time domain analysis; finite integral method; hyperthermia applicator; impedance matching; liver-equivalent phantom; microwave coagulation therapy; radiation patterns; return loss; ring-slot antenna; specific absorption rate distribution; Applicators; Coagulation; Coaxial components; Electromagnetic heating; Finite difference methods; Hyperthermia; Impedance matching; Medical treatment; Microwave antennas; Time domain analysis;
Conference_Titel :
Computational Electromagnetics and Its Applications, 2004. Proceedings. ICCEA 2004. 2004 3rd International Conference on
Print_ISBN :
0-7803-8562-4
DOI :
10.1109/ICCEA.2004.1459323
