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朴贊一(Charn Il Park),高京煥(Kyeong Whan Koh),河星煥(Sung Whan Ha) 대한방사선종양학회 1984 Radiation Oncology Journal Vol.2 No.1
Temperature homogeniety and stationary temperature is the most important thermometric considerations for the clinical use of hyperthermia. A thermal mapping was done in a phantom with thermocouple during hyperthermia which was induced by 1.0 MHz, 0.7~0.8 watts/㎠ ultrasound and unfocused 2.5 cm-diameter transducer. The results were as follows 1. Effective heating range(42.5℃±0.5℃) were obtained 3 cm in width and 4 cm in depth from surface of phantom and temperature distribution was relatively uniform. 2. There was little heating effect more than 2 cm away from transducer axis and more than 5cm in depth. 3. There was hot spots(more than 43℃) in 2.0±0.5 cm depth from transducer along transducer axis.