Liposuction with real-time monitoring using Langevin transducer and imaging array

We constructed a liposuction therapeutic system using a Langevin transducer operating at 38 kHz, paired with an 8.2 MHz imaging array. This system generated high-power ultrasonic energy, which was applied to chicken breast tissue to validate its therapeutic potential. Simultaneously, the acoustic cavitation phenomena induced by the high-power ultrasound were recorded by an 8.2 MHz high-frequency imaging transducer and a hydrophone. With a voltage peak-to-peak (VPP) amplitude of 150 V, the Langevin transducer emitted a peak-to-peak pressure of 31.56 kPa. This resulted in a broadband noise up to 200 kHz, indicative of transient cavitation. The imaging array visualized hyperechoic images resulting from cavitation, and the luminance of these images was evaluated as a function of electrical voltage. A comparative analysis between 50 V and 100 V indicated luminance values of 146 and 178, respectively, suggesting that higher electrical amplitudes correlate with increased bubble activity, leading to a wider noise band and brighter images. Additionally, the temperature rise induced by the Langevin transducer was investigated using a thermocouple, revealing that mechanical and thermal effects could occur simultaneously. A liposuction system with real-time cavitation monitoring will improve its efficacy through guided treatment.