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首页> 外文期刊>IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control >Extended high-frame rate imaging method with limited-diffraction beams
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Extended high-frame rate imaging method with limited-diffraction beams

机译：有限衍射光束的扩展高帧率成像方法

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摘要

Fast three-dimensional (3-D) ultrasound imaging is a technical challenge. Previously, a high-frame rate (HFR) imaging theory was developed in which a pulsed plane wave was used in transmission, and limited-diffraction array beam weightings were applied to received echo signals to produce a spatial Fourier transform of object function for 3-D image reconstruction. In this paper, the theory is extended to include explicitly various transmission schemes such as multiple limited-diffraction array beams and steered plane waves. A relationship between the limited-diffraction array beam weighting of received echo signals and a 2-D Fourier transform of the same signals over a transducer aperture is established. To verify the extended theory, computer simulations, in vitro experiments on phantoms, and in vivo experiments on the human kidney and heart were performed. Results show that image resolution and contrast are increased over a large field of view as more and more limited-diffraction array beams with different parameters or plane waves steered at different angles are used in transmissions. Thus, the method provides a continuous compromise between image quality and image frame rate that is inversely proportional to the number of transmissions used to obtain a single frame of image. From both simulations and experiments, the extended theory holds a great promise for future HFR 3-D imaging.
机译：快速的三维（3-D）超声成像是一项技术挑战。以前，人们开发了一种高帧频（HFR）成像理论，其中在传输中使用了脉冲平面波，并对接收到的回波信号应用了有限衍射阵列波束加权，以生成目标函数的空间傅里叶变换，用于3- D图像重建。在本文中，该理论被扩展为明确包括各种传输方案，例如多个有限衍射阵列波束和转向平面波。建立了接收回波信号的有限衍射阵列波束加权与换能器孔径上相同信号的二维傅立叶变换之间的关系。为了验证扩展的理论，进行了计算机模拟，人体模型的体外实验以及人体肾脏和心脏的体内实验。结果表明，随着越来越多的具有不同参数的有限衍射阵列光束或以不同角度转向的平面波被用于传输，图像分辨率和对比度在较大的视场中得到了提高。因此，该方法在图像质量和图像帧速率之间提供了连续的折衷，该折衷与用于获得单个图像帧的传输次数成反比。从仿真和实验来看，扩展理论都对未来的HFR 3-D成像具有广阔的前景。

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