Development of ultrasonic transducer for subcutaneous fat removal

Abstract

In this study, it was aimed to efficiently disassociate subcutaneous fat by arranging ultrasonic transducer so that ultrasound energy can be focused at a certain distance in order to remove subcutaneous fat efficiently. The intensity of the transducer having a diameter of 10 mm at a frequency of 3 MHz takes 2.6 seconds to decompose the fat when the ultrasound is focused. Organs at risk of necrosis were about 1 minute and 20 seconds longer than fat decomposition, so no damage to organs was worried. Considering the energy concentration and the temperature rise rate considering the treatment time, 3MHz was the most appropriate. Considering X0, it was considered efficient to select a vibrator having a diameter of 5 mm, but it was not easy to obtain a vibrator having an actual diameter of 5 mm. Therefore, a transducer array was designed using a vibrator with a diameter of 10 mm, and proper energy could be focused by adjusting the output intensity.