Design of phase control and drive system for phase-controlled transducer based on high intensity focused ultrasound

Abstract

In recent years, the multi-element phase-controlled transducer used in high intensity focused ultrasound (HIFU) treatment have attracted the attention of many researchers due to their advantages such as adjustable focal length. The phase control and drive system of the multi-element phase-controlled transducer is one of the key factors that determine whether it can be used in clinical treatment. In this paper, a field programmable logic gate array (FPGA), a high-speed digital-to-analog converter and an integrated power amplifier are used to design a phase control and drive system for multi-element phase-controlled transducer for high intensity focused ultrasound treatment. The system has functions of multi-channel output and real-time transmission of delay data of each channel by the personal computer. The actual measurement results show that the peak-to-peak value of the output sine wave signal of each channel of the system can reach 35.3V, the phase resolution can reach 1ns, the delay error is less than 1ns, and the output signal has no high-order harmonic interference, which meets the phase resolution and driving requirements of multi-element phase-controlled transducer applied in clinical treatment.