A Strategy for a Six-Way Synthetic Large Power HIFU Therapy System

In the high-intensity focused ultrasound (HIFU) surgery, there is a problem of poor therapeutic efficacy due to the inevitable depth-dependent decline in ultrasound energy along the ultrasound pathway. In order to address this issue, the article provides a strategy for a six-way synthetic HIFU therapy system aiming to improve the power of the output ultrasonic beam. In this study, a quasi-self-focusing ultrasonic transducer is presented as a solution to the design of large-caliber self-focusing ultrasonic transducers, which makes it possible to achieve higher ultrasonic utilization by adding a backing layer. Its six-way synthetic large power radio frequency (RF) drive system is also discussed. With the realization of adjustable frequency, phase and excitation value of the driving signal, the presented drive system can operate effectively. Additionally, the acoustic field radiated by the transducer was scanned and a few parameters were measured to assess the transducer's appropriateness for HIFU therapy.