Title :
Computer aided design of miniaturized antennas for microwave cardiac ablation
Author :
Chiu, Heng M. ; Mohan, Ananda S.
Author_Institution :
Telecom. Group, Univ. of Technol. Sydney, Broadway, NSW, Australia
Abstract :
This paper discusses methods of designing miniaturized antennas for the application of microwave ablation for the cure of cardiac arrhythmias. Finite Difference Time Domain and Finite Element methods are used to first design and optimize miniaturized antennas. The overall size of the antennas has 2.5 mm outer diameter that is suitable for intravenous catheterization delivery. The bioheat transfer equation is solved using the finite difference method and its predicted temperature results are compared with the results obtained from the in-vivo experiments. Using the combination of electromagnetic and temperature modelling, the predicted results are used to optimise the near-electric-field pattern of the antenna to ensure optimum microwave energy deposition into targeted myocardium. The in-vivo experiments at 2.45 GHz show that the lesion created using the proposed antenna are far superior in both width and depth as compared to the published results
Keywords :
biomedical equipment; cardiology; finite difference time-domain analysis; finite element analysis; hyperthermia; microwave antennas; microwave heating; radiation therapy; 2.45 GHz; 2.5 mm; bioheat transfer equation; cardiac arrhythmias; electromagnetic modelling; finite difference time domain methods; finite element methods; intravenous catheterization delivery; lesion; medical instrumentation; microwave cardiac ablation; miniaturized antennas; myocardium; near-electric-field pattern; optimum microwave energy deposition; temperature modelling; Application software; Catheterization; Design methodology; Design optimization; Difference equations; Finite difference methods; Finite element methods; Microwave antennas; Microwave theory and techniques; Temperature;
Conference_Titel :
Microwave Conference, 2001. APMC 2001. 2001 Asia-Pacific
Conference_Location :
Taipei
Print_ISBN :
0-7803-7138-0
DOI :
10.1109/APMC.2001.985373
