3-D Super-Resolution Ultrasound Imaging With a 2-D Sparse Array.
3-D Super-Resolution Ultrasound Imaging With a 2-D Sparse Array.
复制标题
DOI：
10.1109/tuffc.2019.2943646
复制
发表时间：
2020-02
期刊：
影响因子：
--
通讯作者：
Tang MX
中科院分区：
文献类型：
--
作者：
Harput S;Christensen-Jeffries K;Ramalli A;Brown J;Zhu J;Zhang G;Leow CH;Toulemonde M;Boni E;Tortoli P;Eckersley RJ;Dunsby C;Tang MX
高帧频三维超声成像技术结合超分辨率处理方法，克服了衍射极限分辨率在各个空间方向上的限制，可以实现三维微血管结构的可视化。然而，使用全2D阵列的3D超分辨率超声成像需要具有大量独立通道的系统，由于高成本、复杂性和产生的数据量，其设计可能是不切实际的。在这项研究中，一个2-D稀疏阵列的设计和制造与512个元素选择从一个密度锥形2-D螺旋布局。使用两台同步的ULA-OP 256研究扫描仪进行高帧速率体积成像。通过相干复合在4500 Hz的脉冲重复频率下采集的九角平面波来构建体积图像。两个接触的亚波长管的基于定位的3D超分辨率图像从12秒内采集的6000个体积中生成。最后，本工作论证了使用定制的二维稀疏阵列换能器进行三维超分辨成像和超分辨速度映射的可行性。
High-frame-rate 3-D ultrasound imaging technology combined with super-resolution processing method can visualize 3-D microvascular structures by overcoming the diffraction-limited resolution in every spatial direction. However, 3-D super-resolution ultrasound imaging using a full 2-D array requires a system with a large number of independent channels, the design of which might be impractical due to the high cost, complexity, and volume of data produced. In this study, a 2-D sparse array was designed and fabricated with 512 elements chosen from a density-tapered 2-D spiral layout. High-frame-rate volumetric imaging was performed using two synchronized ULA-OP 256 research scanners. Volumetric images were constructed by coherently compounding nine-angle plane waves acquired at a pulse repetition frequency of 4500 Hz. Localization-based 3D super-resolution images of two touching subwavelength tubes were generated from 6000 volumes acquired in 12 s. Finally, this work demonstrates the feasibility of 3-D super resolution imaging and super-resolved velocity mapping using a customized 2-D sparse array transducer.