EX VIVO MICROWAVE ABLATION APPLICATION AT 2.45 GHz BY A NOVEL NITI SHAPE MEMORY ALLOY BASED RING ANTENNA
Abstract
Although the most preferred treatment methods in cancer treatment are still surgery and chemotherapy, microwave ablation, one of the minimally invasive thermal ablation techniques, is increasingly used in the clinic for patients who cannot afford the risks of these treatment methods. In this study, microwave ablation with a new NiTi ring antenna was performed on a freshly slaughtered beef liver as an Ex Vivo application. Design and optimization was carried out in the CST Microwave studio. Ex Vivo MWA application was carried out at 2.45 GHz, using 50 W microwave power for 5 minutes. The lowest width of the ablation zone formed along the x-axis was 14.58 mm, the highest width was 28.61 mm, the length of the ablation area along the y-axis was 58.032 mm, and the area of the ablation zone was approximately 5.44 cm2. These results show that the proposed NiTi ring antenna has the ability to achieve a sufficient thermal lesion in terms of ablation zone dimensions.
Keywords
Microwave ablation , ring antenna , Ex Vivo , NiTi (Nickel Titanium)
Kaynakça
- Ahmed, M., Brace, C.L., Lee, F.T.J., and Goldberg, S.N. (2011). Principles of and advances in percutaneous ablation, Radiology, 258(2), 351–369.
- Ako, I.P. et al. (2019). A Study of the Radiation Characteristics of a Circular Loop Antenna Using Genetic Algorithm Technique, International Journal of Applied Engineering Research, 14(7), 1499-1504.
- Amabile, C., Ahmed, M., Solbiati, L., Meloni, M.F., Solbiati, M., Cassarino, S., Tosoratti, N., Nissenbaum, Y., Ierace, T., Goldberg, S.N. (2017). Microwave ablation of primary and secondary liver tumours: ex vivo, in vivo, and clinical characterization, International journal of hyperthermia, Vol. 33, No. 1, 34–42.
- Andreano, A., Huang, Y., Meloni, M.F., Lee, F.T., Brace, C. (2010). Microwaves create larger ablations than radiofrequency when controlled for power in ex vivo tissue, Medical Physics, 37(6), 2967– 2973.
- Balanis, C.A. (1982). Antenna Theory: Analysis and Design, 2nd ed., Chapter 5, John Wiley & Sons Inc., New York.
- Bolton, T. (2016). Optimal Design of Electrically Small Loop Antenna Including Surrounding Medium Effects, MSc Thesis, Georgia Institute of Technology. Brace, C.L. (2011). Dual-slot antennas for microwave tissue heating: Parametric design analysis and experimental validation, Medical Physics, 38(7), 4231–4240.
- Brace, C.L. (2020). Microwave tissue ablation: biophysics,technology, and applications, Critical Reviews™ in Biomedical Engineering, 38, 65–78.
- Brace, C.L., Laeseke, P.F., Van der Weide, P.D., and Lee, F.T. (2005). Microwave ablation with a triaxial antenna: Results in ex vivo bovine liver, IEEE Transactions Microwave Theory Technology, 53(1), 215–220.
- Dielectric Properties of Body Tissues. (2021) Erişim adresi: http://niremf.ifac.cnr.it/tissprop/
- Etoz, S. and Brace, C.L. (2018). Analysis of microwave ablation antenna optimization techniques, International journal of RF Microwave Computer Aided Eng., 28:e21224.