综述
ENGLISH ABSTRACT
超广角荧光素眼底血管造影中缺血指数在视网膜血管性疾病中的应用
蒋婧文
陈长征 [综述]
作者及单位信息
·
DOI: 10.3760/cma.j.cn115989-20190422-00194
Application of ischemic index of ultra-widefield fluorescein angiography in retinal vascular diseases
Jiang Jingwen
Chen Changzheng
Authors Info & Affiliations
Jiang Jingwen
Department of Ophthalmology, Renmin Hospital of Wuhan University, Wuhan 430060, China
Chen Changzheng
Department of Ophthalmology, Renmin Hospital of Wuhan University, Wuhan 430060, China
·
DOI: 10.3760/cma.j.cn115989-20190422-00194
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摘要

荧光素眼底血管造影(FFA)是视网膜血管性疾病的重要检查方法,但传统FFA对外周视网膜的观察范围有限。超广角荧光素眼底血管造影(UWFA)是一种新兴的检查方法,扩大了视网膜观察范围,可以清晰地显示外周视网膜的病变。为了精确量化视网膜无灌注区,缺血指数(ISI)这一概念被提出。ISI即通过手动描绘UWFA图像中视网膜无灌注区域计算得出视网膜无灌注区面积与视网膜总面积的比率,是评估视网膜缺血情况的可靠指标。ISI在糖尿病视网膜病变、视网膜静脉阻塞等视网膜血管性疾病的分类、治疗和预后判断中具有重要意义。本文就ISI在视网膜血管性疾病中的应用及发展现状进行综述。

荧光血管造影术;糖尿病视网膜病变;视网膜静脉阻塞;缺血指数;综述
ABSTRACT

Fluorescein fundus angiography (FFA) is an important examination to observe retinal vascular diseases, but the observation of peripheral retina is limited through traditional FFA.Ultra-widefield fluorescein angiography (UWFA) is a new technique which helps to expand the field of view in retina, and explores peripheral retinopathy clearly.To accurately quantify the retinal non-perfusion area, ischemic index (ISI) was proposed.It is calculated by the ratio of the retinal non-perfusion area to the total retinal area by manual description of non-perfusion area in UWFA images.As a reliable index for evaluating retinal ischemia, it is of great significance to study ISI in the classification, treatment and prognosis of retinal vascular diseases such as diabetic retinopathy (DR) and retinal vein occlusion (RVO). This article reviewed the progress in application and development of ISI in retinal vascular diseases.

Fluorescein angiography;Diabetic retinopathy;Retinal vein occlusion;Ischemic index;Review
Chen Changzheng, Email: mocdef.3ab61hzhcnehcuhw
引用本文

蒋婧文,陈长征. 超广角荧光素眼底血管造影中缺血指数在视网膜血管性疾病中的应用[J]. 中华实验眼科杂志,2022,40(11):1100-1103.

DOI:10.3760/cma.j.cn115989-20190422-00194

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1 超广角荧光素眼底血管造影与缺血指数的概念
荧光素眼底血管造影(fluorescein fundus angiography,FFA)是在临床上广泛应用的一项检查。传统FFA一次成像仅能观察到50°的视网膜范围 [ 1 ],即使是应用糖尿病视网膜病变早期治疗研究组(EDTRs)提出的标准7视野(7SF)检查,也仅能覆盖75°的视网膜范围,约占视网膜总面积的25% [ 1 ]。然而多种遗传性、缺血性、退行性、炎性和肿瘤性等眼底病变均可发生在视网膜周边部。另外,一个7SF图像由7张非同时拍摄的图像合成,不同时间点的拼图荧光素染料的分布有差异,降低了图像的准确性,同时还需要患者充分扩瞳和良好的配合度,以及拍摄者熟练的拍摄技巧 [ 1 ]
自2004年Friberg等 [ 2 ]首次描述以来,超广角荧光素眼底血管造影(ultra-widefield fluorescein angiography,UWFA)已在临床上得到广泛应用。UWFA成像系统无需扩瞳和使用接触镜,一次成像即可获得200°范围的视网膜图像,约占视网膜总面积的82%,可以清晰显示周边部视网膜病变 [ 3 ]。同时UWFA无需拼图,可在同一时间点获取视网膜图像,从而能够更真实地反映荧光素染料灌注情况。
缺血指数(ischemic index,ISI)是通过手动描绘UWFA成像上视网膜边界和灌注视网膜,计算无灌注区域的总像素数与全视网膜的总像素数比率的百分数来获得。ISI已被证明是各种视网膜血管性疾病中视网膜缺血状况的可靠指标 [ 4 ]。ISI可实现对视网膜无灌注区域的量化,有助于视网膜血管性疾病的进一步研究,对疾病的诊断、治疗和预后等都有重要意义。
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