Imaging of iris vasculature: current limitations and future perspective.
Journal
Eye (London, England)
ISSN: 1476-5454
Titre abrégé: Eye (Lond)
Pays: England
ID NLM: 8703986
Informations de publication
Date de publication:
05 2022
05 2022
Historique:
received:
09
05
2021
accepted:
01
10
2021
revised:
22
08
2021
pubmed:
16
10
2021
medline:
30
4
2022
entrez:
15
10
2021
Statut:
ppublish
Résumé
Fluorescein and indocyanine green angiography have been the traditional ways to image the vasculature of the iris in the last few decades. Because of the invasive nature of these procedures, they are performed in rare situations, and thus, our understanding about iris vasculature is very limited. Optical coherence tomography angiography (OCTA) is a noninvasive imaging method that enables the detailed visualization of the retinal and choroidal vascular networks. More recently, it has been also used for the examination of the iris vasculature in healthy and disease eyes. However, there is a lack of uniformity in the image acquisition protocols and interpretations in both healthy and pathological conditions. Artifacts of iris OCTA include shadowing, motion, segmentations errors, mirror effects. OCTA devices have an eye-tracking system designed for the posterior segment and the applications of these systems on the anterior segment can determine motion lines, vessel duplication, and vessel discontinuity. OCTA of the iris should always be performed under ambient room lighting to create miosis and reduce iris vasculature changes during the examination. In the near future, eye-tracking systems specifically designed for the iris vessels could permit the follow-up function, and the development of new OCTA metrics could reveal interesting applications of this new imaging technique. 摘要: 荧光素和吲哚青绿血管造影是近几十年来传统的虹膜血管成像方法。由于这些检查为侵入性, 开展的较少, 因此, 我们对虹膜血管系统的了解非常有限。相干光断层血管成像(OCTA)技术是一种非侵入性的成像方法, 能够对视网膜和脉络膜的血管网络进行详细的可视化。最近, 它还被用于检查正常眼和患眼的虹膜血管系统。然而, 在正常和患病的条件下, 图像的采集方案和解释都缺乏一致性。虹膜OCTA的伪影包括阴影、运动、分割误差、镜像效果等。OCTA设备有一个专门为眼后段设计的眼睛追踪系统, 这些系统在眼前段应用时可以确定运动线、血管的重复和血管的不连续性。在检查虹膜OCTA的过程中, 应始终在室内环境照明下进行, 使得瞳孔缩小并减少虹膜血管系统的变化。在不久的将来, 专门为虹膜血管设计的眼睛跟踪系统可以实现后续功能, 而新的OCTA指标的开发可以揭示这种新成像技术的有趣应用。.
Autres résumés
Type: Publisher
(chi)
摘要: 荧光素和吲哚青绿血管造影是近几十年来传统的虹膜血管成像方法。由于这些检查为侵入性, 开展的较少, 因此, 我们对虹膜血管系统的了解非常有限。相干光断层血管成像(OCTA)技术是一种非侵入性的成像方法, 能够对视网膜和脉络膜的血管网络进行详细的可视化。最近, 它还被用于检查正常眼和患眼的虹膜血管系统。然而, 在正常和患病的条件下, 图像的采集方案和解释都缺乏一致性。虹膜OCTA的伪影包括阴影、运动、分割误差、镜像效果等。OCTA设备有一个专门为眼后段设计的眼睛追踪系统, 这些系统在眼前段应用时可以确定运动线、血管的重复和血管的不连续性。在检查虹膜OCTA的过程中, 应始终在室内环境照明下进行, 使得瞳孔缩小并减少虹膜血管系统的变化。在不久的将来, 专门为虹膜血管设计的眼睛跟踪系统可以实现后续功能, 而新的OCTA指标的开发可以揭示这种新成像技术的有趣应用。.
Identifiants
pubmed: 34650219
doi: 10.1038/s41433-021-01809-2
pii: 10.1038/s41433-021-01809-2
pmc: PMC9046297
doi:
Types de publication
Journal Article
Review
Langues
eng
Sous-ensembles de citation
IM
Pagination
930-940Informations de copyright
© 2021. The Author(s), under exclusive licence to The Royal College of Ophthalmologists.
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