Basic Analysis on SAR Distribution of Coaxial-Slot Antenna Array for Interstitial Microwave Hyperthermia

Lira HAMADA  Meng-Shien WU  Koichi ITO  Haruo KASAI  

IEICE TRANSACTIONS on Electronics   Vol.E78-C   No.11   pp.1624-1631
Publication Date: 1995/11/25
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Microwave and Millimeter Wave Technology
interstitial microwave hyperthermia,  coaxial-slot antenna,  antenna array,  moment method,  SAR distribution,  

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The interstitial hyperthermia is an invasive heating method applied by inserting the applicator into the human body. We have been studying on coaxial-slot antennas for interstitial microwave hyperthermia. The characteristics of the square antenna array were theoretically examined. Firstly, the basic structure of the antenna, and a simplified analysis model taking account of the effect of the boundary surface were explained. Then analysis was performed by using the moment method. Finally, the calculated results were discussed. The catheter thickness has much effect on the characteristics and must be considered both in designing and in using the antenna. When the array spacing was increased, the effective heating area became larger and more uniform. As the insertion depth was increased, the effective heating area was also enlarged.