Alterations in Retinal Layer Thickness and Reflectance at Different Stages of Diabetic Retinopathy by En Face Optical Coherence Tomography

Purpose To quantitatively assess choriocapillaris (CC) flow deficits in eyes with diabetic retinopathy (DR) using swept-source optical coherence tomography angiography (SS-OCTA). Methods Diabetic subjects with different stages of DR and age-matched healthy subjects were recruited and imaged with SS-OCTA. The en face CC blood flow images were generated using previously published and validated algorithms. The percentage of CC flow deficits (FD%) and the mean CC flow deficit size were calculated in a 5-mm-diameter circle centered on the fovea from the 6×6-mm scans. Results Forty-five diabetic subjects and 27 control subjects were included in the study. The CC FD% in diabetic eyes was on average 1.4-fold greater than in control eyes (12.34±4.14% vs 8.82±2.61%, P < 0.001). The mean CC FD size in diabetic eyes was on average 1.4-fold larger than in control eyes (2151.3± 650.8μm2 vs 1574.4±255.0 μm2, P < 0.001). No significant difference in CC FD% or mean CC FD size was observed between eyes with nonproliferative DR and eyes with proliferative DR (P = 1.000 and P = 1.000, respectively). Conclusions CC perfusion in DR can be objectively and quantitatively assessed with FD% and FD size. In the macular region, both CC FD% and CC FD size are increased in eyes with DR. SS-OCTA provides new insights for the investigations of CC perfusion status in diabetes in vivo.

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Fluorescein Leakage and Optical Coherence Tomography Angiography Features of Microaneurysms in Diabetic Retinopathy

Journal of Diabetes Research ◽

10.1155/2022/7723706 ◽

2022 ◽

Vol 2022 ◽

pp. 1-9

Author(s):

Ruoyu Chen ◽

Anyi Liang ◽

Jie Yao ◽

Zicheng Wang ◽

Yesheng Chen ◽

...

Keyword(s):

Optical Coherence Tomography ◽

Diabetic Retinopathy ◽

Fluorescein Angiography ◽

Detection Rate ◽

Optical Coherence Tomography Angiography ◽

Optical Coherence ◽

Face Images ◽

Potential Biomarker ◽

En Face Oct ◽

En Face

Background and Objective. To correlate optical coherence tomography angiography (OCTA) characteristics of diabetic microaneurysms (MAs) with leakage status on fluorescein angiography (FA). Patients and Methods. 167 MAs from 39 diabetic eyes were analyzed using OCTA and FA simultaneously. The characteristics of MAs on OCTA en face, OCT en face, and OCT B-scan with flow overlay were evaluated and correlated with fluorescein leakage status. Results. Thirty-six, fifty-two, and seventy-nine MAs showed no, mild, and severe leakage on FA, respectively. Most MAs (61.7%) were centered in the inner nuclear layer. Cystoid spaces were observed adjacent to 60 (35.9%) MAs. MAs with severe leakage had a statistically higher flow proportion compared to MAs with no or mild leakage (both P < 0.001 ). Only 112 MAs (67.1%) were visualized in the OCTA en face images, while 165 MAs (98.8%) could be visualized in the OCT en face images. The location of MAs did not associate significantly with FA leakage status. The presence of nearby cystoid spaces and higher flow proportion by OCT B-scan with flow overlay correlated significantly with FA leakage status. Conclusion. The flow proportion of MAs observed on OCT B-scans with flow overlay might be a potential biomarker to identify leaking MAs. A combination of OCT B-scan, OCT en face, and OCTA en face images increased the detection rate of diabetic MAs in a noninvasive way.

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The assessment of retinal layer thickness and volume segmentation reproducibility of optical coherence tomography images

Acta Ophthalmologica Scandinavica ◽

10.1111/j.1600-0420.2007.01062_3410.x ◽

2007 ◽

Vol 85 ◽

pp. 0-0

Author(s):

E TATRAI ◽

GM SOMFAI ◽

M FERENCZ ◽

CA PULIAFITO ◽

FD CABRERA

Keyword(s):

Optical Coherence Tomography ◽

Layer Thickness ◽

Retinal Layer ◽

Optical Coherence ◽

Volume Segmentation

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Inter-session repeatability of retinal layer thickness in optical coherence tomography

10.1117/12.2254640 ◽

2017 ◽

Cited By ~ 1

Author(s):

D. Cabrera DeBuc ◽

Jing Tian ◽

Nathan Bates ◽

Gabor Mark Somfai

Keyword(s):

Optical Coherence Tomography ◽

Layer Thickness ◽

Retinal Layer ◽

Optical Coherence

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Inner macular layer thickness by spectral domain optical coherence tomography in children and adults: a hospital-based study

British Journal of Ophthalmology ◽

10.1136/bjophthalmol-2018-312349 ◽

2019 ◽

Vol 103 (11) ◽

pp. 1576-1583 ◽

Cited By ~ 5

Author(s):

Yung Ju Yoo ◽

Jeong-Min Hwang ◽

Hee Kyung Yang

Keyword(s):

Optical Coherence Tomography ◽

Layer Thickness ◽

Male Gender ◽

Spectral Domain ◽

Retinal Layer ◽

Inner Plexiform Layer ◽

Optical Coherence ◽

Korean Children ◽

Factors Associated ◽

Sd Oct

PurposeTo establish the normative ranges of macular ganglion cell layer (mGCL) and macular inner plexiform layer (mIPL) thickness using Spectralis spectral domain optical coherence tomography (SD-OCT) (Heidelberg Engineering, Inc., Heidelberg, Germany) in both Korean children and adults, and to determine factors associated with mGCL and mIPL thickness.MethodsWe conducted a retrospective, observational study of 573 healthy subjects (5–70 years old) who underwent comprehensive ophthalmic examinations in a single institution. Each inner retinal layer thickness was measured using SD-OCT and automatic segmentation software. Cross-sectional analysis was used to evaluate the effect of gender, age and ocular parameters on mGCL and mIPL thickness. Normative ranges of mGCL and mIPL thickness according to age, gender and factors associated with mGCL and mIPL thickness were measured.ResultsThe mean mGCL and mIPL thickness were 40.6±2.8 and 33.8±2.0 µm, respectively. Determinants of inner sector mGCL thickness were circumpapillary retinal nerve fibre layer (cpRNFL) thickness (β=1.172, p<0.001), age (β=−0.019, p=0.021) and male gender (β=1.452, p<0.001). Determinants of inner sector mIPL thickness were cpRNFL (β=0.952, p<0.001) and male gender (β=1.163, p<0.001). The inner sector mGCL and mIPL thickness increased significantly with age in children (β=0.174, p=0.009 and β=0.115, p=0.013), and then decreased in adults (β=−0.070, p<0.001 and β=−0.024, p=0.032). In the case of outer sectors, mGCL and mIPL thickness were not significantly related to age and gender.ConclusionsThis study ensured a normative range of the mGCL and mIPL thickness using Spectralis OCT. Gender, age and cpRNFL thickness significantly correlated with mGCL and mIPL thickness. This information should be considered in the interpretation of SD-OCT data.

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