超音波를 利用한 溫熱療法時 溫度分布에 關한 硏究

Thermometry in Hyperthermia induced by Ultrasound A Phantom study

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.