分为两型，非增殖型（npdr）和增值型（pdr），关键的划界标志与国内分型一样，即是否存在新生血管。非增殖型又分为三期（轻中重三度）： 轻度npdr：视网膜毛细血管的渗透性增加性改变，包括视网膜出血，微血管瘤和水肿

2023年3月1日 · PDR is a major cause of visual loss characterized by new vessels formation at the vitreoretinal interface and extending into vitreous. Evaluation of diabetic retina by FFA is a well-known tool for diagnosis of PDR. The aim of our study was to characterize neovascularization pattern in PDR by analyzing FFA images.

2023年7月12日 · WfSS-OCTA is an independent non-invasive alternative to FFA for NV discovery, NVD detection, and individual NVE identification, particularly in patients with PDR who have a history of prior treatment with anti-VEGF. Diabetic retinopathy (DR) is the leading cause of blindness among the global working-age population [1, 2, 3].

对比观察记录PDR患眼在OCTA和FFA图像中黄斑拱环结构改变、黄斑水肿、视网膜微血管瘤、视网膜新生血管、视网膜无灌注区5种眼底病变的影像学特征,并分析两种检查方法对上述眼底改变检出的一致性。 结果 PDR患眼的OCTA特征主要为黄斑拱环结构改变区视网膜浅层毛细血管扩张迂曲、深层中心凹无血管区扩大,黄斑水肿区视网膜浅层血管迂曲扩张、视网膜深层片囊状弱信号,视网膜微血管瘤区浅层、深层毛细血管局部囊样扩张膨大或梭形改变,视网膜新生血管区浅层、深 …

A statistically significant lowering of mean PSV of the ICA has been found in eyes with PDR, compared to NPDR, with no significant difference in the mean resistive index. FFA shows delayed arm to retina transit time, prolonged arteriovenous transit, choroidal perfusion defects, and late staining of arteries and veins.

2018年3月30日 · proliferative diabetic retinopathy (PDR), fundus autofluorescence (FAF) Photographer Lanin Chen Imaging device Fundus camera Description

2022年12月25日 · 那么如何判断pdr增生膜的类型？李教授介绍了影像学及组织病理学等多种检测方法： 影像学. 荧光素眼底血管造影术（ffa）：活膜因有新生血管，ffa显示高荧光及大片荧光素渗漏；死膜一般显示着染，无大片荧光素渗漏。

2019年11月12日 · Fundus fluorescein angiography (FFA) has been the gold standard for evaluating neovascularization of the retinal elsewhere (NVE) over the past decades. However,...

2017年11月15日 · Fundus fluorescein angiography (FFA) is an imaging modality that can provide useful information regarding the retinal vasculature in the retina [14].

2019年10月10日 · 增殖性糖尿病性视网膜病变（proliferative diabetic retinopathy, PDR)做为糖尿病的眼部并发症，一旦错过了早期的诊断治疗对视力损伤极大。 并且随着全球糖尿病发病率逐年增高，有专家认为在未来十年内预防及治疗PDR将会是眼科医生的一项重要任务。 目前从非增殖性糖尿病视网膜病变 (non proliferative diabetic retinopathy, NPDR)到PDR的预测主要还是依据眼底彩照以及全身性的危险因素评估，缺乏更精准的预测。 眼底无灌注区与PDR新生血管发生密切 …