Bohs L N, Friemel B H, Kisslo J, Harfe D T, Nightingale K R, Trahey G E
Department of Biomedical Engineering, Duke University, Durham, NC 27708-0281, USA.
J Am Soc Echocardiogr. 1995 Nov-Dec;8(6):915-23. doi: 10.1016/s0894-7317(05)80016-1.
A method for constructing three-dimensional images of flow is described. The technique involves the acquisition of numerous closely spaced planes, each comprised of a map of the two-dimensional velocities measured in that plane. Each such vector velocity map is formed by tracking the motion of small regions of ultrasonic speckle between two ultrasonic acquisitions separated by a short time interval. In contrast to current Doppler velocity methods, this technique measures both the axial and lateral components of flow and is not subject to aliasing. The resulting series of two-dimensional vector velocity maps is then combined into a three-dimensional data set, which can be manipulated with appropriate software to yield quantitative three-dimensional displays of the flow within the interrogated volume. In this article we present such images obtained from measurements of in vitro laminar flow in a vessel, as well as a free jet phantom. The results allow comprehensive visualization of the three-dimensional flow characteristics, indicating promise for more complete and quantitative clinical assessment of blood flow.
描述了一种构建血流三维图像的方法。该技术涉及获取大量紧密间隔的平面，每个平面都包含在该平面中测量的二维速度图。每个这样的矢量速度图是通过跟踪在短时间间隔分开的两次超声采集之间超声散斑小区域的运动而形成的。与当前的多普勒速度方法相比，该技术测量血流的轴向和横向分量，并且不受混叠影响。然后将所得的一系列二维矢量速度图组合成三维数据集，可以使用适当的软件对其进行处理，以生成被检测体积内血流的定量三维显示。在本文中，我们展示了从血管内体外层流测量以及自由射流模型获得的此类图像。结果允许对三维血流特征进行全面可视化，这表明在更完整和定量的血流临床评估方面具有前景。
