A REAL-TIME SYSTEM FOR QUANTIFYING AND DISPLAYING 2-DIMENSIONAL VELOCITIES USING ULTRASOUND
A REAL-TIME SYSTEM FOR QUANTIFYING AND DISPLAYING 2-DIMENSIONAL VELOCITIES USING ULTRASOUND
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DOI：
10.1016/0301-5629(93)90092-3
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发表时间：
1993-01-01
影响因子：
2.9
通讯作者：
TRAHEY, GE
中科院分区：
文献类型：
--
作者：
BOHS, LN;FRIEMEL, BH;TRAHEY, GE
本文描述了一种为使用超声波实时测量二维速度而开发的系统。该仪器使用绝对和差 (SAD) 算法跟踪帧间散斑图案运动，以生成 2D 速度矢量图。该系统的并行架构允许使用当前的跟踪几何结构每秒计算大约 20,000 个向量。可编程图形处理器对各个速度矢量进行颜色编码，并将它们实时显示在 B 模式图像上。体外测试表明，该系统可以跟踪扫描平面中任何方向上远超多普勒混叠极限的速度，准确度超过 94%。从流动体模获得的彩色编码图像突显了系统以均匀着色显示横向运动的能力，这与当前超声多普勒仪器的双色显示形成鲜明对比。
This paper describes a system that has been developed for measuring two-dimensional velocities in real time using ultrasound. The instrument tracks interframe speckle pattern motion using a Sum-Absolute-Difference (SAD) algorithm in order to produce a vector map of 2D velocities. The system's parallel architecture allows calculation of approximately 20,000 vectors per second using the current tracking geometry. A programmable graphics processor encodes individual velocity vectors with color and displays them superimposed on the B-mode image in real time. In vitro tests indicate that the system can track velocities well over the Doppler aliasing limit in any direction in the scan plane with greater than 94% accuracy. A color encoded image obtained from a flow phantom highlights the system's ability to display lateral motion with uniform coloration, in contrast to the two-color display of current ultrasonic Doppler instruments.