Smedby O, Fuchs L, Tillmark N
Department of Diagnostic Radiology, Uppsala University, Sweden.
J Biomech Eng. 1991 Aug;113(3):336-41. doi: 10.1115/1.2894892.
In order to demonstrate separated flow in vivo, a method for the computerized analysis of cineangiographies has been developed, tested in vitro, and compared with LDV. A pulsatile flow was created in a glass model bifurcation, and velocity profiles were obtained with LDV at several phase angles. The flow was cinefilmed during contrast injection and the images were digitized. The computer then transformed the image sequence into parametric images representing arrival times of the contrast. The separation regions demonstrated with LDV were identified as areas with delayed contrast arrival. A preliminary analysis of a cineangiography in vivo is also included.
为了在体内演示分离流，已开发出一种用于计算机分析电影血管造影的方法，该方法在体外进行了测试，并与激光多普勒测速仪（LDV）进行了比较。在玻璃模型分叉处产生脉动流，并在几个相角处用LDV获得速度剖面。在注射造影剂期间对流动进行电影拍摄，并将图像数字化。然后计算机将图像序列转换为表示造影剂到达时间的参数图像。用LDV显示的分离区域被识别为造影剂到达延迟的区域。还包括对体内电影血管造影的初步分析。
