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Author: search.filters.author.Sanpanich, A.Subject: search.filters.subject.Microwave ablation

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    Optimal monitoring point for temperature and power control in microwave ablation system by using FEM
    (2012-12-01)
    Pairoch, S.
    ;
    Phasukkit, P.
    ;
    Sanpanich, A.
    This study presents an optimal location of monitoring point for using by PID system to control temperature and output power of hepatic cancer microwave ablation system. We investigated a relation between output power and treatment time in hepatic ablation. A simple simulation model was adapted from COMSOL FEM solver. As a preliminary, monitoring point was supposed to place at 0.5 centimeter besides ablation probe. The simulation results shown that temperature at this monitoring point is linearly related to output power and treatment time. ©2012 IEEE.
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    Analysis of heat sink effect in hepatic cancer treatment near arterial for microwave ablation by using finite element method
    (2012-12-01)
    Yhamyindee, P.
    ;
    Phasukkit, P.
    ;
    Tungjitkusolmon, S.
    ;
    Sanpanich, A.
    This paper presents an analysis of heat sink effect in hepatic cancer treatment near arterial vessel for microwave ablation by using finite element method. We analyze the temperature distribution, Specific Absorbtion Rate (SAR) and coagulation area in two models. The first is hepatic tissue without artery and the second is hepatic tissue with artery. In the second model, we specify distance between antenna and artery at 10 mm. The initial condition is set as power at 50 watts, temperature at 37°C and blood perfusion rate is varied at 6.4 × 10<sup>-10</sup>, 6.4 × 10<sup>-3</sup> and 6.4 × 10<sup>4</sup> l/s. The simulation results by using three-dimensional finite element analysis show that the temperature distribution in case of hepatic tissue with no artery is larger than the case with artery. We also found that blood perfusion rate affects to the temperature distribution in hepatic tissue. Higher blood perfusion rate, higher heat sink effect occur. ©2012 IEEE.
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    3D finite element analysis for varicose vein therapy by using microwave ablation
    (2012-12-01)
    Prasantamrongsiri, S.
    ;
    Phasukkit, P.
    ;
    Pintavirooj, C.
    ;
    Tungjitkusolmun, S.
    ;
    Sanpanich, A.
    This paper presents three-dimensional finite element method for analyze a varicose vein microwave ablation. Varicose vein can contract by using heat from microwave ablation. Because of varicose vein patients have leg pain from long time standing, and do a lot of activities. Symptoms have influenced the daily life of patients. We study method for varicose vein therapy by using microwave ablation. Because of this method is easy to use for varicose vein therapy. In this research work, we propose simulation varicose vein that varicose vein is inserted with antenna into blood vessel. Simulation method delivers microwave to antenna inserted in varicose vein. For this reason, varicose vein is contract. Finite element analysis can apply in treatment planning and show temperature distribution and specific absorption rate (SAR) distribution for contract of varicose vein characteristic by using microwave therapy. And the doctor can be use the data for treat in future. ©2012 IEEE.
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    3D finite element analysis for coronary artery disease therapy by using microwave ablation
    (2012-12-01)
    Chaiyun, T.
    ;
    Phasukkit, P.
    ;
    Pintavirooj, C.
    ;
    Sanpanich, A.
    This paper presents three-dimensions finite element analysis of 2.45 GHz microwave ablation for plagued coronary artery treatment. Any narrowing or blockage of the coronary arteries reduces blood supply to the heart tissue, following by reducing an amount of delivered oxygen and nutrients. This phenomenon inhibits a normal function of the heart muscle. In this research, we propose an application of finite element method to analyze and simulate a microwave ablation process on the blockage or plagued coronary artery. The investigation emphasizes on a reduction of plague or fat size that fixed around a coronary wall when heating by microwave thermal ablation. The simulation results of 3D analysis show the characteristic of temperature distribution in the coronary artery and a destructive area of plaque. 10 Watts of emission power at temperature 95°C is used as a preliminary value. The simulation found that 3.21 mm<sup>3</sup> of plaque size can be destroyed with 10 s. These obtained results usefully guide us to develop and more investigate on a further system in the future. ©2012 IEEE.