TY - GEN
T1 - Design of ultrawideband applicator for microwave ablation aimed at thermal therapy in liver cancer
AU - Narpati, Faisal
AU - Basari, null
N1 - Publisher Copyright:
© 2017 IEEE.
PY - 2017/12/5
Y1 - 2017/12/5
N2 - Thermal ablation is conducted by utilizing temperature changes to destroy the abnormal tissue or restore its function. The latest technique in thermal ablation is Microwave Ablation (MW Ablation) that rely on the propagation of electromagnetic waves that is able to increase the temperature of a tissue rapidly. Changes in temperature during the ablation process will reduce the water content in the body tissue (78% of the liver tissue is composed of water) and affect the value of permittivity and conductivity of the tissue. These changes cause the impedance matching of the antenna applicator also change during the ablation process. The change on impedance will make the system does not match with the previous resonant frequency. In addition, the microwave ablation applicator, which is designed for specific frequencies (2.4 GHz and 915MHz) with narrow band characteristics will be suffered from aforementioned phenomenon. Meanwhile, according to the previous studies there are other prominent resonant frequencies that used for MW Ablation, i.e. 1.9 GHz, 6 GHz, 9.2 GHz and 10 GHz. Therefore to accommodate some of the frequencies that are widely used in microwave ablation technique and to tackle the problems arising from the reduced transmission efficiency, then an applicator that has ultrawideband (UWB) characteristics is proposed. In this paper, we design an applicator, which has the characteristics of UWB by modifying the ground plane of the applicator by a hexagonal-sectioned coil. The applicator is designed on a FR4 substrate and numerically simulated with liver phantom by using CST Microwave Studio. The proposed applicator is able to have wide bandwidth by 8.1 GHz, with lower frequency (fl) 1.84 GHz and higher frequency (fh) 10 GHz.
AB - Thermal ablation is conducted by utilizing temperature changes to destroy the abnormal tissue or restore its function. The latest technique in thermal ablation is Microwave Ablation (MW Ablation) that rely on the propagation of electromagnetic waves that is able to increase the temperature of a tissue rapidly. Changes in temperature during the ablation process will reduce the water content in the body tissue (78% of the liver tissue is composed of water) and affect the value of permittivity and conductivity of the tissue. These changes cause the impedance matching of the antenna applicator also change during the ablation process. The change on impedance will make the system does not match with the previous resonant frequency. In addition, the microwave ablation applicator, which is designed for specific frequencies (2.4 GHz and 915MHz) with narrow band characteristics will be suffered from aforementioned phenomenon. Meanwhile, according to the previous studies there are other prominent resonant frequencies that used for MW Ablation, i.e. 1.9 GHz, 6 GHz, 9.2 GHz and 10 GHz. Therefore to accommodate some of the frequencies that are widely used in microwave ablation technique and to tackle the problems arising from the reduced transmission efficiency, then an applicator that has ultrawideband (UWB) characteristics is proposed. In this paper, we design an applicator, which has the characteristics of UWB by modifying the ground plane of the applicator by a hexagonal-sectioned coil. The applicator is designed on a FR4 substrate and numerically simulated with liver phantom by using CST Microwave Studio. The proposed applicator is able to have wide bandwidth by 8.1 GHz, with lower frequency (fl) 1.84 GHz and higher frequency (fh) 10 GHz.
KW - Applicator
KW - Liver Cancer
KW - Microwave Ablation
KW - Thermal Therapy
KW - Ultrawideband
UR - http://www.scopus.com/inward/record.url?scp=85045925764&partnerID=8YFLogxK
U2 - 10.1109/QIR.2017.8168472
DO - 10.1109/QIR.2017.8168472
M3 - Conference contribution
AN - SCOPUS:85045925764
T3 - QiR 2017 - 2017 15th International Conference on Quality in Research (QiR): International Symposium on Electrical and Computer Engineering
SP - 150
EP - 153
BT - QiR 2017 - 2017 15th International Conference on Quality in Research (QiR)
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 15th International Conference on Quality in Research: International Symposium on Electrical and Computer Engineering, QiR 2017
Y2 - 24 July 2017 through 27 July 2017
ER -