Laser Doppler measurements of blood velocity in human retinal vessels.
Laser Doppler measurements of blood velocity in human retinal vessels.
复制标题
激光多普勒测量人体视网膜血管的血流速度。
DOI：
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发表时间：
1978
影响因子：
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通讯作者：
C. Riva
中科院分区：
文献类型：
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作者：
G. Feke;C. Riva
我们测量了激光从流经单个人视网膜血管的红细胞（RBC）散射的多普勒频移谱（DSFS）。每个光谱都有一个截止频率，该频率与测量部位的最大RBC速度直接相关。有意义的DSFS可以在短至0.1 s的时间内测量。从流过玻璃毛细管的聚苯乙烯球和红细胞悬浮液中获得的DSFS用于说明该技术的基本原理并帮助解释体内测量结果。我们的测量结果表明，最大红细胞在视网膜动脉的速度变化显着在每个心动周期。
We have measured Doppler shift frequency spectra (DSFS) of laser light scattered from red blood cells (RBC's) flowing through individual human retinal vessels. Each spectrum exhibits a cutoff frequency which is directly related to the maximum RBC velocity at the measurement site. Meaningful DSFS can be measured in times as short as 0.1 s. DSFS obtained from suspensions of polystyrene spheres and RBC's flowing through glass capillary tubes are used to illustrate the basic principles of the technique and to aid in the interpretation of the in vivo measurements. Our measurements show that maximum RBC velocities in retinal arteries vary markedly during each cardiac cycle.