Accurate Investigation of Coaxial-Slot Antenna for Invasive Microwave Hyperthermia Therapy

NEERU MALHOTRA, Anupma Marwaha, Ajay Kumar


Invasive microwave hyperthermia is a technique applied for treatment of cancer in which body tissue is exposed to high temperatures. The effectiveness of hyperthermia depends upon the temperature achieved during the therapy and the distribution of microwave thermal field; which further depends upon the type of microwave radiative antenna. Microwave ablation (MWA) or high temperature hyperthermia is a minimally invasive technique used to treat liver cancer, the effectiveness of which depends on highly localized spherical shaped leison with minimum back radiations near the tumor cells. The present work performs investigation of single slot coaxial antenna operating at 2.45 GHz in the ISM (Industrial, Scientific, and Medical) band through 3D simulation for more realistic liver tissue using Finite element method (FEM) based software package; HFSS. The field distributions and specific absorption rate (SAR) obtained for the antenna are exported to ANSYS software for determining temperature distribution in the liver tissue. The results concordant with the theory are obtained using HFSS. Therefore, it is suggested that this research could be a reference for clinical therapy and operation scheme.


Microwave Hyperthermia; Microwave Ablation (MWA); Coaxial Slot Antenna; Finite Element Method (FEM); Liver Cancer, Specific Absorption Rate (SAR).

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Mario Francisco Jesus, Cepeda Rubio,Coaxial Slot Antenna Design for Microwave Hyperthermia using Finite-Difference Time-Domain and Finite Element Method. The Open Nanomedicine Journal, 3, 2-9, 2011.

Haemmerich D, Chachati L, Wright A.S., Mahvi D.M., Lee F.T, Webster J.G.,Hepatic radiofrequency ablation with internally cooled probes: Effect of coolant temperature on lesion size. IEEE Trans. Biomed. Engg, 50, 493-500,2003.

Bertram J.M., Yang D, Converse MC, Webster J.G., Mahvi D.M.,Antenna design for microwave hepatic ablation using an axisymmetric electromagnetic model. Biomed Eng Online; 5-15, 2006.

Kim, J. and Rahmat Samii, Y.,.Implanted antennas inside a human body: Simulations, designs, and Characterizations. IEEE Trans. on Microwave Theory and Techniques, 52, 1934-1943,2004.

Khebir, A., Kaouk, Z. and Savard, P.,Modeling a microwave catheter antenna for cardiac ablation, Micro-wave Symposium Digest, IEEE MTT-S International, Orlando, 299-302, 1995.

Lumori, M. L. D.,Experimentally based modeling of field sources for three-dimensional computation of SAR in electromagnetic hyperthermia and treatment planning, IEEE Trans. on Microwave Theory and Techniques, 48, 1522-1530, 2000.

Rossetto, F. and Staufer, P.R., (1999).Effect of complex bolus-tissue load configurations on SAR distributions from dual concentric conductor applicators. IEEE Trans. on Biomed.Engg., 46, 1310-1319,1999.

David Keane, Jeremy Ruskin, Nancy Norris, Pierre-Antoine Chapelon, Dany Brub, .In Vitro and In Vivo Evaluation of the Thermal Patterns and Lesions of Catheter Ablation with a Microwave Monopole Antenna. Journal of Interventional Cardiac Electrophysiology, 10(2), 111-119, 2004.

Rosenbaum, R.M., Greenspon, A.J., Hsu, S., Walinsky, P. and Rosen, A.,.RF and microwave ablation for the treatment of ventricular tachycardia. Microwave Symposium Digest, IEEE MTT-S Int., Atlanta, 1155-1158, 1993.

Wu J.K.,Two problems of computer mechanics program system. Proc. Finite Element Analysis and CAD, Peking University Press, Beijing, 9-15, 1994.

Saito, K., Taniguchi, T., Yoshimura, H. and Ito, K.,.Estimation of SAR distribution of a tip-split array applicator for microwave coagulation therapy using the finite element method. IEICE Trans. on Electronics, 948-954, 2001.

Van Esser S, (2007).Minimally invasive ablative therapies for invasive breast carcinomas: an overview of current literature. World J Surg, 31, 2284-2292, 2007.

Yadava,R.L., RF/ microwave in bio-medical applications. 8th Int. Conf. on Electromagnetic. Interference and Compatibility (INCEMIC), Yadava, 81-85,2003.

Haemmerich D, Santos I, Schutt D.J, Webster J.G, and Mahvi D.M, In vitro measurements of temperature-dependent specific heat of liver tissue. Med. Eng. Phys., 28, 194-197, 2006.

Clibbon K.L., Mccowen A, Efficient computation of SAR distributions from interstitial microwave antenna arrays. IEEE Trans. Microwave Theory Tech, 42, 595-600, 1994.

Prakash Punit and Webster John G,.An Optimal Sliding Choke Antenna for Hepatic Microwave Ablation. IEEE Trans. on Biomed. Engg., 56(10), 2470-2476, 2009.

Keangin P., Rattanadecho P. and Wesapan T., An analysis of heat transfer in liver tissue during microwave ablation using single and double slot antenna. Int. Comm. in Heat and Mass Transfer, Elsevier Science, 38(6), 757-766, 2011.


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