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DuPont, Mariana; Arthur, Edmund; Shihab, Yazen; Kenny, Madelyn; Ravichandran, Swetha; Parsons-Wingerter, Patricia; Vyas, Ruchi; Murray, Matthew C.; Predovic, Marina; Lim, Shiyin; Jacobs, Nicole; Ramesh, Sneha; Vu, Amanda; Sekaran, Srinivaas; Chalam, Kakarla V.; Moorthy, Ramana S.; Crosson, Jason; Mason, John; Grant, Maria B.
Life (Basel, Switzerland), 07/2024, Letnik: 14, Številka: 7Journal Article
(1) Background: Previously, VESsel GENeration (VESGEN) software was used to map and quantify vascular changes observed on fluorescein angiography (FA) in subjects (n = 15 eyes) with retinal pathology ranging from mild non-proliferative diabetic retinopathy (NPDR) to proliferative diabetic retinopathy (PDR). In the current study, we used VESGEN for the assessment of individuals with early-stage NPDR imaged by FA (Cohort 1) and by optical coherence tomography angiography (OCTA; Cohort 2). (2) Methods: Cohort 1 included type 2 diabetics (T2D), represented 21 eyes (ranging from no DR to moderate DR), and also included nondiabetic controls (NDC; n = 15 eyes). Cohort 2 consisted of 23 eyes from T2D subjects (including no DR subjects and moderate DR subjects) and NDC (n = 18 eyes). (3) Results: In the FA-VESGEN study, total tortuosity (Tv) of microvessels (G ≥ 6) increased in T2D with mild DR compared to the controls. In contrast, the VESGEN analysis of OCTA images showed that vessel length (characterized as density) was lower in T2D subjects before the diagnosis of DR and following the diagnosis of DR when compared to the controls. Additionally, T2D showed a significant decrease in vessel area (density). (4) Conclusions: FA elucidated the vessel morphology of small-generation microvessels to a greater degree than OCTA; however, OCTA identified changes in vessel density better than FA. VESGEN analysis can be used with both standard FA and OCTA to facilitate our understanding of early events in DR, including before the clinical diagnosis of DR.
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in: SICRIS
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