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Title   915 MHz 극초단파를 사용한 온열 치료시 조직내 혈류량이 온도 분포에 미치는 영향 ( Effect of Tissue Perfusion on Temperature Distribution in 915 MHz Microwave Hyperthermia )
Publicationinfo   1993 Jan; 025(05): 736-744.
Key_word   Hyperthermia, Phantom, Temperature distribution, Tissue perfusion
Full-Text  
Abstract   Prefusion is the principal determinant of temperature distribution of tissue by the cooling effect of blood flow on hyperthermia. So, the effect of tissue perfusion on hyperthermia may be one of the most important factor in the response of tumors. In this study, to evaluate the cooling effect of tissue perfusion, dynamic phantom was heated with 915 MHz microwave and the temperature distribution was observed. 1) The temperature decreased slowly upto the depth of 1.5 cm from the phantom surface, but beyond that, it decreased rapidly. And beyond 3.5 cm, temperature of 42.5`C, for effective hyperthermia could never be achieved with any power and any flow rate. 2) Under a constant microwave power, temperature rise was inversely proportional to the flow rate, but when the flow rate was extremely slow or fast, the relation could not hold. 3) Under a constant flow rate, temperature rise was proportional to the microwave power, and inversely proportional to the flow rate. 4) From the results, we could estimate the microwave power required for effective hyperthermia along the flow rate and depth.
저 자   양미경(Mi Gyoung Yang),하성환(Sung Whan Ha),박찬일(Charn Il Park)