Wide-field optical coherence tomography angiography using extended field imaging technique to evaluate the nonperfusion area in retinal vein occlusion

Masayo Kimura, Miho Nozaki, Munenori Yoshida, Yuichiro Ogura Department of Ophthalmology and Visual Science, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan Purpose: Optical coherence tomography angiography (OCTA) is a newly developed technology which allows us to reconst...

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Main Authors: Kimura M, Nozaki M, Yoshida M, Ogura Y
Format: Article
Language:English
Published: Dove Medical Press 2016-07-01
Series:Clinical Ophthalmology
Subjects:
Online Access:https://www.dovepress.com/wide-field-optical-coherence-tomography-angiography-using-extended-fie-peer-reviewed-article-OPTH
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spelling doaj-97088e0377e64e4982bf325872dec8362020-11-24T23:33:53ZengDove Medical PressClinical Ophthalmology1177-54832016-07-012016Issue 11291129527889Wide-field optical coherence tomography angiography using extended field imaging technique to evaluate the nonperfusion area in retinal vein occlusionKimura MNozaki MYoshida MOgura YMasayo Kimura, Miho Nozaki, Munenori Yoshida, Yuichiro Ogura Department of Ophthalmology and Visual Science, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan Purpose: Optical coherence tomography angiography (OCTA) is a newly developed technology which allows us to reconstruct the three-dimensional chorioretinal vasculature without dye injection. OCTA is a noninvasive, rapid, and reproducible method to assess retinal ischemia. However, one of its limitations is the size of scanning area. A novel yet simple technique to expand the scan length on optical coherence tomography has been reported as an extended field imaging (EFI) technique. It involves imaging the posterior pole through trial frames fitted with a +20 diopter lens. We applied this technique to OCTA to evaluate retinal vein occlusion.Materials and methods: Ten eyes of nine patients with retinal vein occlusion were studied. The average age was 69.0 years (range: 49–93 years). We obtained OCTA images by using RTVue XR Avanti OCT with AngioVue®. The images of OCTA with scan size of 8×8 mm were obtained with and without EFI, and then they were compared.Results: OCTA with EFI technique was performed successfully in all eyes. The nonperfusion area was well defined in superficial capillary plexus layer. The images with EFI were able to capture the larger area of the fundus by an average of 188.5% than those without EFI. The posterior pole inside the vascular arcade was well covered with this technique. The area of the fundus imaged by OCTA with EFI technique was even larger than that of fluorescein angio­graphy using Heidelberg Retina Angiograph 2, which captured a 30° field.Conclusion: Our results suggested that OCTA with EFI technique is very useful to evaluate the retinal ischemia in retinal vein occlusion. Keywords: optical coherence tomography angiography, OCTA, retinal vein occlusion, RVO, nonperfusion area, wide-field imaging, extended field imaging, EFIhttps://www.dovepress.com/wide-field-optical-coherence-tomography-angiography-using-extended-fie-peer-reviewed-article-OPTHoptical coherence tomography angiography (OCTA)retinal vein occlusion (RVO)non-perfusion areawide-field imaging
collection DOAJ
language English
format Article
sources DOAJ
author Kimura M
Nozaki M
Yoshida M
Ogura Y
spellingShingle Kimura M
Nozaki M
Yoshida M
Ogura Y
Wide-field optical coherence tomography angiography using extended field imaging technique to evaluate the nonperfusion area in retinal vein occlusion
Clinical Ophthalmology
optical coherence tomography angiography (OCTA)
retinal vein occlusion (RVO)
non-perfusion area
wide-field imaging
author_facet Kimura M
Nozaki M
Yoshida M
Ogura Y
author_sort Kimura M
title Wide-field optical coherence tomography angiography using extended field imaging technique to evaluate the nonperfusion area in retinal vein occlusion
title_short Wide-field optical coherence tomography angiography using extended field imaging technique to evaluate the nonperfusion area in retinal vein occlusion
title_full Wide-field optical coherence tomography angiography using extended field imaging technique to evaluate the nonperfusion area in retinal vein occlusion
title_fullStr Wide-field optical coherence tomography angiography using extended field imaging technique to evaluate the nonperfusion area in retinal vein occlusion
title_full_unstemmed Wide-field optical coherence tomography angiography using extended field imaging technique to evaluate the nonperfusion area in retinal vein occlusion
title_sort wide-field optical coherence tomography angiography using extended field imaging technique to evaluate the nonperfusion area in retinal vein occlusion
publisher Dove Medical Press
series Clinical Ophthalmology
issn 1177-5483
publishDate 2016-07-01
description Masayo Kimura, Miho Nozaki, Munenori Yoshida, Yuichiro Ogura Department of Ophthalmology and Visual Science, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan Purpose: Optical coherence tomography angiography (OCTA) is a newly developed technology which allows us to reconstruct the three-dimensional chorioretinal vasculature without dye injection. OCTA is a noninvasive, rapid, and reproducible method to assess retinal ischemia. However, one of its limitations is the size of scanning area. A novel yet simple technique to expand the scan length on optical coherence tomography has been reported as an extended field imaging (EFI) technique. It involves imaging the posterior pole through trial frames fitted with a +20 diopter lens. We applied this technique to OCTA to evaluate retinal vein occlusion.Materials and methods: Ten eyes of nine patients with retinal vein occlusion were studied. The average age was 69.0 years (range: 49–93 years). We obtained OCTA images by using RTVue XR Avanti OCT with AngioVue®. The images of OCTA with scan size of 8×8 mm were obtained with and without EFI, and then they were compared.Results: OCTA with EFI technique was performed successfully in all eyes. The nonperfusion area was well defined in superficial capillary plexus layer. The images with EFI were able to capture the larger area of the fundus by an average of 188.5% than those without EFI. The posterior pole inside the vascular arcade was well covered with this technique. The area of the fundus imaged by OCTA with EFI technique was even larger than that of fluorescein angio­graphy using Heidelberg Retina Angiograph 2, which captured a 30° field.Conclusion: Our results suggested that OCTA with EFI technique is very useful to evaluate the retinal ischemia in retinal vein occlusion. Keywords: optical coherence tomography angiography, OCTA, retinal vein occlusion, RVO, nonperfusion area, wide-field imaging, extended field imaging, EFI
topic optical coherence tomography angiography (OCTA)
retinal vein occlusion (RVO)
non-perfusion area
wide-field imaging
url https://www.dovepress.com/wide-field-optical-coherence-tomography-angiography-using-extended-fie-peer-reviewed-article-OPTH
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AT yoshidam widefieldopticalcoherencetomographyangiographyusingextendedfieldimagingtechniquetoevaluatethenonperfusionareainretinalveinocclusion
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