Bohs L N, Friemel B H, McDermott B A, Trahey G E
Department of Biomedical Engineering, Duke University, Durham, NC 27706.
Radiology. 1993 Jan;186(1):259-61. doi: 10.1148/radiology.186.1.8416575.
The authors developed an ultrasound system that enables the speckle patterns produced by echoes from moving blood to be tracked in real time. Unlike current color Doppler flow imagers, this system allows the measurement of blood velocities in any direction within the imaging plane. The authors used this device to image flow in the human jugular vein and contrasted the image with one obtained under similar circumstances with color Doppler flow imaging. The authors demonstrated that this system can display in vivo lateral blood flow in real time. Further development of the system, including the incorporation of wall filters to enhance weak blood echoes and parallel techniques to reduce data acquisition time, will allow clinical imaging of flow with velocities of several meters per second in any direction without aliasing or dependence on the Doppler angle.
作者开发了一种超声系统，该系统能够实时跟踪由移动血液的回波产生的散斑图案。与当前的彩色多普勒血流成像仪不同，该系统允许在成像平面内的任何方向测量血流速度。作者使用该设备对人体颈静脉中的血流进行成像，并将该图像与在类似情况下通过彩色多普勒血流成像获得的图像进行对比。作者证明了该系统能够实时显示体内横向血流。该系统的进一步发展，包括加入壁滤波器以增强微弱的血液回波以及采用并行技术以减少数据采集时间，将允许对任何方向上速度达每秒数米的血流进行临床成像，而不会出现混叠或依赖于多普勒角度。
