Chawla Rohan, Pujari Amar, Mittal Kanhaiya, Rakheja Vaishali, Markan Ashish
Ophthalmic Surg Lasers Imaging Retina. 2018 Mar 1;49(3):216-219. doi: 10.3928/23258160-20180221-12.
Swept-source optical coherence tomography angiography (SS-OCTA) is a promising new imaging modality for assessing retinal and choroidal vasculature. Faster scanning speed, large number of A-scan acquisition, and enhanced depth penetration has enhanced the detailed analysis of retinal layers. The authors discuss SS-OCTA features of a rare case of retinal arteriovenous malformation. Image analysis revealed the anomalous large-caliber vessels occupying up to the entire retinal thickness with associated echolucent changes in the inner retinal layers surrounding the retinal vessels, along with disruption of the outer retinal layers, including the inner/outer segments of photoreceptors beneath the large tortuous vessels outside the foveola in absence of any capillary nonperfusion areas or lack of significant macular edema. At the fovea, the outer retinal layers were intact due to a smaller caliber and less-deep extension of the anomalous vessels. [Ophthalmic Surg Lasers Imaging Retina. 2018;49:216-219.].
扫频源光学相干断层扫描血管造影（SS-OCTA）是一种用于评估视网膜和脉络膜血管系统的很有前景的新型成像方式。更快的扫描速度、大量A扫描采集以及增强的深度穿透能力提高了对视网膜各层的详细分析。作者讨论了一例罕见视网膜动静脉畸形的SS-OCTA特征。图像分析显示，异常的大口径血管占据了整个视网膜厚度，视网膜血管周围的视网膜内层出现相关的无回声改变，同时视网膜外层受到破坏，包括黄斑小凹外大的迂曲血管下方光感受器的内/外节，且不存在任何毛细血管无灌注区域或明显的黄斑水肿。在黄斑中心凹处，由于异常血管口径较小且延伸深度较浅，视网膜外层保持完整。[《眼科手术、激光与视网膜成像》。2018年；49:216 - 219。]
