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M. Tamim Hossain,Bibin Prasad,박기선,이희준,하유호,이승구,김중경 한국정밀공학회 2016 International Journal of Precision Engineering and Vol.17 No.2
Hyperthermia with a radiofrequency electric field can treat a cancer by delivering energy to heat and kill cancer cells. For a deeply located tumor, focused energy to raise its local temperature selectively is crucial for effective cancer treatment with minimal injury to normal tissues. We evaluated the selective heating characteristics of hyperthermia with 13.56 MHz radiofrequency energy in phantom models by experimental and computational approaches. Phantom materials with different electrical properties such as distilled water, normal saline, egg white and porcine meat were used. Temperature rise in depthwise during heating at 75 W output power was compared. The temperature of the egg white increased selectively in the distilled water but not significantly in the saline. Numerical simulation was performed using SEMCAD X software to calculate the distributions of specific absorption rate (SAR) and temperature, which enabled us to elucidate the selective heating mechanism in those phantom models.
Ki Sun Park,M. Tamim Hossain,김중경,이희준 대한기계학회 2023 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.37 No.11
Radiofrequency hyperthermia is a treatment that involves heating cancer tissue by supplying a 10 to 100 MHz radiofrequency current through an electrode, aiming to induce thermal necrosis of cancer cells. However, this process also heats normal cells, making it crucial to monitor the temperature inside the patient's body to prevent thermal necrosis of healthy tissues. Accurate noninvasive measurement of the internal body temperature is of utmost importance in radiofrequency hyperthermia. To achieve this, a numerical study was conducted to predict a patient's body temperature by solving the Laplace and Pennes’ bioheat transfer equations for the specific area where the cancer is located. An in-house numerical program was developed and applied to radiofrequency hyperthermia to find the optimal electrode location, enhancing the necrosis rate of cancer cells while avoiding thermal damage to normal tissues.
고주파 온열치료시 비침습 온도분포 예측 및 전극 위치 최적화 수치해석
박기선(Ki Sun Park),타밈핫세인(M. Tamim Hossain),김중경(Jung Kyung Kim),이희준(Hee Joon Lee) 대한기계학회 2015 대한기계학회 춘추학술대회 Vol.2015 No.11
The hyperthermia treatment has been operated to the patients that have cancer cell in their inside and has been improved for selectivity of killing the cancer cells gradually. The radio-frequency(RF) hyperthermia has been considered as an alternative medical treatment of tumor necrosis by application of heating to enhance the efficacy of the existing cancer treatments. Because the hyperthermia treatment treats cancer by heat, it is important that the operator check states of patients like temperature distributions. Unless thermocouples are inserted to the patients, it is hard to know the states. In this study, SAR (Specific Absorption Rate) inside a body was obtained by electrical simulation assuming the RF treatment. The corresponding body temperature distribution was simulated and visualized by solving heat conduction equation with plugging the SAR for the RF hyperthermia treatment. Then, the simulation on optimizing position of electrode was conducted.