OCT血管成像在眼科的应用

光学相干断层扫描血管成像(OCTA)是近年来新兴的血管成像技术，除具备传统OCT的优点外，还能够分层观察视网膜脉络膜血管形态及血流改变情况，使用伪彩可区分正常与异常的血管结构，并且能够对血流信号进行探测和量化分析。此外，与传统的荧光素眼底血管造影(FFA)和吲哚菁绿造影(ICGA)技术不同，OCTA无需静脉注射造影剂就能提供比传统眼底血管造影技术更多、更准确的血流信息。但是，任何技术的临床应用都有其局限性。本文将对OCTA的基本原理及其在眼科的应用、局限性进行综述。

Application of OCT angiography in ophthalmology

Optical coherence tomography angiography(OCTA)is a new technology of angiography in recent years. In addition to the advantages of traditional OCT, it can observe blood flow in different retinal and choroidal segmentation slab. By using the pseudo-color, abnormal vascular structure can be distinguished from normal vascular structure of the retina. Dye injection is not needed with OCTA, which is different from fundus fluorescein angiography(FFA)and indocyanine green angiography(ICGA). OCTA provides more and more accurate blood flow information. However, like other biometric technology, OCTA has its limitations and shortcomings. This review will analyze and summarize the operating principle of OCTA, its application in ophthalmology, as well as its advantages and limitations.