基于有限衍射波的合成孔径三维超声成像

3D ultrasound imaging based on synthetic aperture of the limited diffraction beams

现有的三维(3D)超声成像由于受到二维(2D)传感器工艺复杂和传统聚焦成像中声波传播时间的限制,成像系统帧率和分辨率都比较低.为此提出了基于有限衍射波的合成孔径成像方法,该方法使用一维(1D)传感器发射有限衍射波声场,采用合成孔径技术对整个目标区域回波信号综合处理,利用Fourier变换进行成像.计算机仿真结果表明,该方法可以用来成像.在当前成像方法中,该方法可以同时获得较高的帧率和分辨率,并且降低了对传感器的要求,具有较大的发展应用空间.

The conventional 3D imaging system is limited by the complexity of the 2D array transducer and the propagation time for focusing.This can result in low frame rate and poor resolution.In order to solve these problems,a new method was proposed which was based on the synthetic aperture of the limited diffraction beams.In this method,a moving 1D array transducer was used to transmit the limited diffraction beams,and the received signals were processed by the synthetic aperture technique.The 3D images can be achieved using Fourier transform.Simulation results show that this method can be used for 3D imaging.Compared with the current 3D imaging methods,the proposed approach can achieve improvement in both frame rate and resolution,and decreases the need for the transducer.Therefore,this method has the potential in farther development and applications.