相控超声屏蔽微栓研究

Research on Shielding of Emboli with the Phase-Controlled Ultrasound

神经系统并发症发生的原因与体外循环和术中操作产生的微栓有关,利用超声辐射力屏蔽微栓的方法,可以有效地降低神经系统并发症发生的概率,流体中的微粒在声场中会受到声辐射力的作用,改变其运动轨迹。该文主要研究了超声屏蔽微栓方法。该超声装置利用FPGA开发板产生方波信号,经功率放大器产生正弦波信号,驱动超声探头产生相控超声信号,上位机控制软件基于Qt开发平台开发。研究结果表明超声辐射力屏蔽微栓具有一定的可行性。该文的研究为后续的深入研究奠定了坚实的基础。

The postoperative neurological complications is associated with intraoperative cerebral emboli, which results from extracorporeal circulation and operation. It can effectively reduce the incidence of neurological complications with ultrasonic radiation. In fluids, a particle will change it＇s motion trail when it is acted by the radiation force generated by the ultrasound. This article mainly discuss how to shielding emboli with ultrasound. The equipment can transmit phased ultrasonic signals, which is designed on a FPGA development board. The board can generate a square wave, which is converted into a sine wave through a power amplifier. In addition, the control software has been developed on Qt development environment. The result indicates it＇s feasible to shielding emboli with ultrasonic radiation force. This article builds a strong foundation for the future research.