The Second Affiliated Hospital of Chongqing Medical University
扫频源光学相干断层扫描血管成像（swept-source optical coherence tomography angiography，SS-OCTA）检查是近几年提出的一种新型血管成像技术，具有非侵入性、快速、高分辨率、自动化血管分层成像等优势，在眼科相关疾病的早期诊断、疗效评估及监测疾病进展等方面具有很高的价值。基于OCTA的基础，SS-OCTA采用快速调谐的激光器和1050nm的波长，穿透力更强，对视网膜和脉络膜微血管系统进行无创深度分辨成像，加深了对多种眼部疾病（眼底病变、青光眼、神经退行性疾病等）特征的认识。此外，SS-OCTA也可用于研究眼前节结构，如角膜新生血管的深度和密度、虹膜新生血管治疗前后的变化等。 该技术为眼科临床实践提供了一种新的手段。本文就SS-OCTA技术在眼科临床的应用进展进行综述。
Swept-source optical coherence tomography angiography (SS-OCTA) is a new vascular imaging technique that was recently proposed. It has the advantages of being non-invasive, quick, high-resolution, and automated vascular stratification imaging. It is extremely helpful in the early diagnosis of ophthalmology-related diseases, as well as in the evaluation of treatment effectiveness and the tracking of disease progression. Based on the foundation of OCTA, SS-OCTA utilizes a fast-tuning laser with a wavelength of 1050nm for deeper penetration and non-invasive depth-resolved imaging of the retinal and choroidal microvascular systems, deepening the understanding of the characteristics of a wide range of ophthalmic diseases (fundus lesions, glaucoma, neurodegenerative diseases, etc.). The structures of the anterior segment of the eye can also be studied using SS-OCTA, including changes in the depth and density of corneal neovascularization as well as changes in iris neovascularization before and after therapy. This approach provides a novel tool for ophthalmic clinical practice. The development of the clinical use of SS-OCTA technology in ophthalmology is reviewed in this article.