超声成像系统中数字双波束合成技术研究与实现

Study and Implementation of Digital Dual Beamformation Techniques in the Ultrasound Imaging System

以提高超声成像系统帧频为目标,研究了双波束合成技术及其硬件实现方法。首先,对其理论模型进行了声场建模与仿真,并针对仿真中发现的失真问题提出了改进方法。在此基础上,完成了双波束合成孔径超声成像系统的设计和调试。结果表明,采用双波束合成技术可以将帧频提高为原来的两倍。

To heighten the frame rate of ultrasound imaging system, the thesis focused on the dual beamformation technique and its hardware implementation was introduced. At first, its theoretical model was studied through both acoustic field modeling and computer simulation, and a modification scheme was proposed to solve the problems of distortion revealed by the simulation results. On this basis, a prototype of ultrasound imaging system with dual beams and synthetic aperture was designed and tested. The conclusion shows that the frame rate can be improved twice of the old.