Ultrasound three-dimensional velocity measurements by feature tracking
Ultrasound three-dimensional velocity measurements by feature tracking
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DOI：
10.1109/58.489394
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发表时间：
1996-05-01
影响因子：
3.6
通讯作者：
vonRamm, OT
中科院分区：
文献类型：
--
作者：
Bashford, GR;vonRamm, OT
本文描述了一种适用于三维血流速度测量的与角度无关的新方法，该方法跟踪脉冲回波系统产生的超声散斑的特征。在该方法中，识别特征，并随时间跟踪以检测运动。其他血流速度测量方法通常使用一维(1-D)或二维(2-D)空间和时间信息来估计速度。由于高程维度中的运动引起的散斑去相关可能会阻碍对真实的3-D血流速度向量的这种估计。特征跟踪是一种三维方法，能够测量真实的血流速度向量，而不是在直线或平面上的投影。使用组织体模和实时体积超声成像系统的离线实验表明，可以识别和跟踪斑点信号的局部最大检测值，以测量典型的人体血流速度。讨论了特征跟踪的局限性，包括峰值位置的不确定性和局部极大值的持续时间。并对该方法的预期误差进行了分析。
This article describes a new angle-independent method suitable for three-dimensional (3-D) blood how velocity measurement that tracks features of the ultrasonic speckle produced by a pulse echo system. In this method, a feature is identified and followed over time to detect motion. Other blood flow velocity measurement methods typically estimate velocity using one- (1-D) or two-dimensional (2-D) spatial and time information. Speckle decorrelation due to motion in the elevation dimension may hinder this estimate of the true 3-D blood flow velocity vector. Feature tracking is a 3-D method with the ability to measure the true blood velocity vector rather than a projection onto a line or plane. Off-line experiments using a tissue phantom and a real-time volumetric ultrasound imaging system have shown that the local maximum detected value of the speckle signal may be identified and tracked for measuring velocities typical of human blood flow. The limitations of feature tracking, including the uncertainty of the peak location and the duration of the local maxima are discussed. An analysis of the expected error using this method is given.