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Optical coherence tomography angiography in diabetic retinopathy: a review of current applications

Kai Yuan Tey, Kelvin Teo, Anna C. S. Tan, Kavya Devarajan, Bingyao Tan, Jacqueline Tan, Leopold Schmetterer, Marcus Ang
2019 Eye and Vision  
length of vessels, vascular architecture and area of the foveal avascular zone.  ...  OCTA may potentially serve as a useful non-invasive imaging tool in the diagnosis and monitoring of diabetic retinopathy and maculopathy in the future.  ...  Acknowledgements Not applicable Authors' contributions All authors contributed equally in this work. All authors read and approved the final manuscript.  ... 
doi:10.1186/s40662-019-0160-3 pmid:31832448 pmcid:PMC6859616 fatcat:znr3qxn6obbmvbihiyzuy5tfqq

Fast 3-dimensional estimation of the Foveal Avascular Zone from OCTA [article]

Giovanni Ometto, Giovanni Montesano, Usha Chakravarthy, Frank Kee, Ruth E. Hogg, David P. Crabb
2020 arXiv   pre-print
The area of the foveal avascular zone (FAZ) from en face images of optical coherence tomography angiography (OCTA) is one of the most common measurement based on this technology.  ...  Then, the measurements were analyzed using linear mixed effect models to identify differences between three groups of eyes: healthy, diabetic without diabetic retinopathy (DR) and diabetic with DR.  ...  ., “Early diagnosis of diabetic retinopathy in octa images based on local analysis of retinal blood vessels and foveal avascular  ... 
arXiv:2012.09945v1 fatcat:5rag3qy425dltdtgrspmxnnt7q

QUANTITATIVE OPTICAL COHERENCE TOMOGRAPHY ANGIOGRAPHY FEATURES FOR OBJECTIVE CLASSIFICATION AND STAGING OF DIABETIC RETINOPATHY

Minhaj Alam, Yue Zhang, Jennifer I. Lim, Robison.V.P. Chan, Min Yang, Xincheng Yao
2018 Retina  
Six quantitative features, that is, blood vessel tortuosity, blood vascular caliber, vessel perimeter index, blood vessel density, foveal avascular zone area, and foveal avascular zone contour irregularity  ...  One hundred and twenty OCTA images from 60 NPDR (mild, moderate, and severe stages) patients and 40 images from 20 control subjects were used for this study conducted in a tertiary, subspecialty, academic  ...  Mark Janowicz and Ms. Andrea Degillio (Eye and Ear Infirmary, University of Illinois at Chicago) for technical support of data acquisition.  ... 
doi:10.1097/iae.0000000000002373 pmid:30383712 pmcid:PMC6494740 fatcat:qqkezj67qfcqvpk6biglp62cly

Parafoveal OCT Angiography Features in Diabetic Patients without Clinical Diabetic Retinopathy: A Qualitative and Quantitative Analysis

Mathilde M. Goudot, Anne Sikorav, Oudy Semoun, Alexandra Miere, Camille Jung, Blandine Courbebaisse, Mayer Srour, Joseph G. Freiha, Eric H. Souied
2017 Journal of Ophthalmology  
Quantitative analysis measured foveal avascular zone (FAZ) size, parafoveal capillary density, and enlargement coefficient of FAZ between SCP and DCP. Results.  ...  To evaluate the capacity of OCT angiography (OCTA) for detecting infraclinical lesions in parafoveal capillaries in diabetic patients without diabetic retinopathy (DR). Methods.  ...  Acknowledgments The authors would like to thank the whole care team of the Department of Ophthalmology of Creteil Hospital for the achievement of this study.  ... 
doi:10.1155/2017/8676091 pmid:28761762 pmcid:PMC5518527 fatcat:5mqn2jjaxzconbxgqgi5si2rie

Linking Retinal Microvasculature Features With Severity of Diabetic Retinopathy Using Optical Coherence Tomography Angiography

Devanshi Bhanushali, Neha Anegondi, Santosh G. K. Gadde, Priya Srinivasan, Lavanya Chidambara, Naresh Kumar Yadav, Abhijit Sinha Roy
2016 Investigative Ophthalmology and Visual Science  
Local fractal analysis was applied to the superficial and deep retinal OCTA images.  ...  Foveal avascular zone area (FAZ in mm 2 ); vessel density (%); spacing between large vessels (%); and spacing between small vessels (%) were analyzed.  ...  Acknowledgments The present imaging study was done as part of a collaborative characterization of a large cohort of diabetic retinopathy patients with Genentech (San Francisco, CA, USA).  ... 
doi:10.1167/iovs.15-18901 pmid:27472275 fatcat:ilb4gnq7rrfufkkxedh2sdgfsu

Optical coherence tomography angiography (OCTA) flow speed mapping technology for retinal diseases

Malvika Arya, Ramy Rashad, Osama Sorour, Eric M Moult, James G Fujimoto, Nadia K Waheed
2018 Expert Review of Medical Devices  
Various quantitative metrics have been developed, such as foveal avascular zone area and vessel density.  ...  diabetic retinopathy.  ...  , the Foundation for the National Institutes of Health (NIH 5-R01-EY011289-31), and the Macula Vision Research Foundation.  ... 
doi:10.1080/17434440.2018.1548932 pmid:30460869 pmcid:PMC6529293 fatcat:adrade4e7vhsbkv6y5moul3sve

Optical Coherence Tomography Angiography in Diabetes and Diabetic Retinopathy

Jacqueline Chua, Ralene Sim, Bingyao Tan, Damon Wong, Xinwen Yao, Xinyu Liu, Daniel S. W. Ting, Doreen Schmidl, Marcus Ang, Gerhard Garhöfer, Leopold Schmetterer
2020 Journal of Clinical Medicine  
Recently, optical coherence tomography angiography (OCTA) has been developed to image the retinal microvasculature, by generating 3-dimensional images based on the motion contrast of circulating blood  ...  Diabetic retinopathy (DR) is a common complication of diabetes mellitus that disrupts the retinal microvasculature and is a leading cause of vision loss globally.  ...  Conflicts of Interest: The author(s) declare that they have no competing interests.  ... 
doi:10.3390/jcm9061723 pmid:32503234 pmcid:PMC7357089 fatcat:vpgbqmpvorbbzdcazfxkzbddu4

Human retinal microvascular imaging using adaptive optics scanning light ophthalmoscopy

Toco Y. P. Chui, Shelley Mo, Brian Krawitz, Nikhil R. Menon, Nadim Choudhury, Alexander Gan, Moataz Razeen, Nishit Shah, Alexander Pinhas, Richard B. Rosen
2016 International Journal of Retina and Vitreous  
Conclusion: This review will briefly summarize the abilities of in vivo human retinal microvasculature imaging in healthy controls, as well as patients with diabetic retinopathy, retinal vein occlusion  ...  microvascular structure, measurements of blood flow velocity, and microvascular network mapping.  ...  Shadow of a non-perfused blood vessel is indicated by a white arrow. b Visualization of the non-perfusion blood vessel on nonconfocal AOSLO structural image. c Superimposed composite of a (in red) and  ... 
doi:10.1186/s40942-016-0037-8 pmid:27847629 pmcid:PMC5088465 fatcat:b2egdryz2ngwbmxq3qegte7mry

Optical coherence tomography angiography versus fluorescein angiography in diagnosis of ischemic diabetic maculopathy

Mansour Hassan Ahmed, Hazem Effat Abd Elghany Haroun, Safaa Awad-allah Mohamed Aboud, Sanaa Aiad El Sayed Ahmed
2022 International Journal of Health Sciences  
diagnosed according to the Early Treatment Diabetic Retinopathy Study (ETDRS) classification based on Foveal avascular zone (FAZ) parameters.  ...  Objectives: To compare between the use of Fundus Fluorescein Angiography (FFA) and Optical Coherence Tomography Angiography (OCTA) in the diagnosis and quantification of diabetic macular ischemia (DMI)  ...  ischemia (DMI) based on Foveal avascular zone (FAZ) parameters.  ... 
doi:10.53730/ijhs.v6ns7.11494 fatcat:jdte5t4455f4dm42noizewin6e

Assessment of capillary dropout in the superficial retinal capillary plexus by optical coherence tomography angiography in the early stage of diabetic retinopathy

Ceying Shen, Shu Yan, Min Du, Hong Zhao, Ling Shao, Yibo Hu
2018 BMC Ophthalmology  
To assess capillary dropout in the superficial retinal capillary plexus (SCP) by optical coherence tomography angiography (OCTA) in the early stage of diabetic retinopathy (DR).  ...  Conclusions: In the early stage of NPDR, retinal capillary dropout and retinal thickness changes can be clearly captured and analyzed by OCTA.  ...  Publisher's note Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.  ... 
doi:10.1186/s12886-018-0778-2 pmid:29739379 pmcid:PMC5941753 fatcat:mly63uqlzne3xmwt3spwokoija

Plexus-Specific Detection of Retinal Vascular Pathologic Conditions with Projection-Resolved OCT Angiography

Rachel C. Patel, Jie Wang, Thomas S. Hwang, Miao Zhang, Simon S. Gao, Mark E. Pennesi, Steven T. Bailey, Brandon J. Lujan, Xiaogang Wang, David J. Wilson, David Huang, Yali Jia
2018 Ophthalmology Retina  
In cases of diabetic retinopathy, retinal vessel occlusion, and retinitis pigmentosa, PR-OCTA detected retinal nonperfusion regions within deeper retinal plexuses not visualized by conventional OCTA.  ...  The volumetric scans were segmented and visualized on different plexuses. Main Outcome Measures-Qualitative observation of vascular abnormalities on both crosssectional and en face PR-OCTA images.  ...  with an irregular foveal avascular zone.  ... 
doi:10.1016/j.oret.2017.11.010 pmid:30148244 pmcid:PMC6106769 fatcat:zxnlcbklfndkhddeob7ugcw56e

Association of macular perfusion status with microvascular parameters up to the far periphery in diabetic retinopathy using multimodal imaging

Dorottya Hajdu, Aleksandra Sedova, Felix Datlinger, Julia Hafner, Irene Steiner, Katharina Kriechbaum, Christoph Scholda, Stefan Sacu, Ursula Schmidt-Erfurth, Andreas Pollreisz
2020 International Journal of Retina and Vitreous  
Foveal avascular zone (FAZ) and vessel density from the superficial (SCP) and deep capillary plexus (DCP) were assessed on optical coherence tomography angiography (OCTA) scans (Topcon, DRI-OCT Triton)  ...  stages of diabetic retinopathy (DR).  ...  Acknowledgements The authors thank the collaborators at the Vienna Clinical Trial Centre (Medical University of Vienna, Austria).  ... 
doi:10.1186/s40942-020-00253-w pmid:33292856 fatcat:6p63bv7l4zgr3bg4b3kbepecie

Cognitive decline in older adults: What can we learn from optical coherence tomography (OCT)-based retinal vascular imaging?

Alison G Abraham, Xinxing Guo, Lubaina T Arsiwala, Yanan Dong, A Richey Sharrett, David Huang, Qisheng You, Liang Liu, Brandon J Lujan, Alexander Tomlinson, Thomas Mosley, Josef Coresh (+3 others)
2021 Journal of The American Geriatrics Society  
The foveal avascular zone (FAZ) area was also estimated. Image quality was assessed by trained graders at a reading center.  ...  Optical coherence tomographic angiography (OCTA) was used to capture vessel density (VD) from a 6 × 6 mm scan of the macula in several vascular layers from 2017 to 2019.  ...  The foveal avascular zone (FAZ) area, 41 defined as the region in the fovea devoid of retinal blood vessels, was also estimated from 3 Â 3 mm 2 images.  ... 
doi:10.1111/jgs.17272 pmid:34009667 pmcid:PMC8440348 fatcat:ehorcr2sqzdltjiae3gcewr5je

Association Between the Severity of Diabetic Retinopathy and Optical Coherence Tomography Angiography Metrics

Binxin Xu, Jiahui Chen, Shaohua Zhang, Shengli Shen, Xuan Lan, Zhineng Chen, Zhiqiang Yan, Bingxiang Xu
2021 Frontiers in Endocrinology  
OCTA metrics based on the proposed segmentation method were validated to be reliable for further analysis of the relationship between OCTA metrics and diabetes and the severity of diabetic retinopathy.  ...  Changes in vessel morphology are influenced by systemic risk factors. However, there is a lack of analysis of the relationship between OCTA metrics and systemic risk factors.  ...  University, and all the volunteers for their help.  ... 
doi:10.3389/fendo.2021.777552 pmid:34956088 pmcid:PMC8702651 fatcat:5odrugg33fd4tdwz7urdafms3a

Macular Vessel Density in Diabetic Retinopathy Patients: How Can We Accurately Measure and What Can It Tell Us?

Varsha Pramil, Emily S Levine, Nadia K Waheed
2021 Clinical Ophthalmology  
In this non-systematic review, the measurement of macular vessel density in diabetic retinopathy and the reasons for its importance in the diagnosis and management of patients with diabetes and varying  ...  Macular vessel density is one of the quantitative metrics that can be obtained from OCTA images.  ...  This includes foveal avascular zone (FAZ) area and perimeter, FAZ contour irregularity, blood vessel tortuosity (BVT), blood vessel caliber (BVC), vessel perimeter index (VPI), fractal dimension (FD) and  ... 
doi:10.2147/opth.s272328 pmid:33880011 pmcid:PMC8053507 fatcat:t5zzit7gebhwpdvzjjgffuz27a
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