Teng Jiao^*, Hua Wang, Yang Zhang, Xiao Yu, Huijun Xue, Hao Lv, Xijing Jing, Hua Zhan, Jianqi Wang

Show more
Department of Biomedical Engineering, The Fourth Military Medical University, Xi’an, China.
Show less

Abstract: When the technique of invasive microwave hyperthermia is applied to cancer treating, the distribution of microwave thermal field and the effect of the therapy are determined by the type of microwave radiative antenna. The thermal field of biological tissue produced by microwave radiative antenna is investigated in this paper. The distribution of thermal field and specific absorption rate (SAR) of invasive coaxial-slot antenna in the frequency of 2450 MHz are obtained by the technique of finite element analysis. According to the experiment of heating the ex vivo pork liver by this kind of antenna, the result concordant with the theory is obtained. Therefore, it is suggested that this research could be a reference for clinical therapy and operation scheme.

Keywords: Microwave Hyperthermia Therapy; Antenna; Thermal Field; SAR

Cite this paper: Jiao, T. , Wang, H. , Zhang, Y. , Yu, X. , Xue, H. , Lv, H. , Jing, X. , Zhan, H. and Wang, J. (2012) A coaxial-slot antenna for invasive microwave hyperthermia therapy. Journal of Biomedical Science and Engineering, 5, 198-202. doi: 10.4236/jbise.2012.54026.

References

[1]   Kim, J. and Rahmat-Samii, Y. (2004) Implanted antennas inside a human body: Simulations, designs, and characterizations. IEEE Transactions on Microwave Theory and Techniques, 52, 1934-1943. doi:10.1109/TMTT.2004.832018

[2]   Khebir, A., Kaouk, Z. and Savard, P. (1995) Modeling a microwave catheter antenna for cardiac ablation. Microwave Symposium Digest, IEEE MTT-S International, Orlando, 16-20 May 1995, 299-302. doi:10.1109/MWSYM.1995.406047

[3]   Lum?ri, M.L.D. (2000) Experimentally based modeling of field sources for three-dimensional computation of SAR in electromagnetic hyperthermia and treatment planning. IEEE Transactions on Microwave Theory and Techniques, 48, 1522-1530. doi:10.1109/22.869003

[4]   Rossetto, F. and Staufer, P.R. (1999) Effect of complex bolus-tissue load configurations on SAR distributions from dual concentric conductor applicators. IEEE Transactions on Biomedical Engineering, 46, 1310-1319. doi:10.1109/10.797991

[5]   Whayne, J.G., Nathan, S. and Haines, D.E. (1994) Microwave catheter ablation of myocardium in vitro. Circulation, 89, 2390-2395.

[6]   Rosenbaum, R.M., Greenspon, A.J., Hsu, S., Walinsky, P. and Rosen, A. (1993) RF and microwave ablation for the treatment of ventricular tachycardia. Microwave Symposium Digest, IEEE MTT-S International, Atlanta, 14-18 June 1993, 1155-1158. doi:10.1109/MWSYM.1993.277076

[7]   Wu, J.K. (1994) Two problems of computer mechanics program system. Proceedings of Finite Element Analysis and CAD, Peking University Press, Beijing, 9-15.

[8]   Saito, K., Taniguchi, T., Yoshimura, H. and Ito, K. (2001) Estimation of SAR distribution of a tip-split array applicator for microwave coagulation therapy using the finite element method. IEICE Transactions on Electronics, E84-C, 948-954.

[9]   Yadava, R.L. (2003) RF/microwaves in bio-medical applications. 8th International Conference on Electromagnetic Interference and Compatibility (INCEMIC 2003), Yadava, 18-19 December 2003, 81-85. doi:10.1109/ICEMIC.2003.1287768