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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Autores principales:	Kimura M, Nozaki M, Yoshida M, Ogura Y
Formato:	article
Lenguaje:	EN
Publicado:	Dove Medical Press 2016
Materias:	optical coherence tomography angiography (OCTA) retinal vein occlusion (RVO) non-perfusion area wide-field imaging Ophthalmology RE1-994
Acceso en línea:	https://doaj.org/article/97088e0377e64e4982bf325872dec836
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spelling	oai:doaj.org-article:97088e0377e64e4982bf325872dec8362021-12-02T00:30:53ZWide-field optical coherence tomography angiography using extended field imaging technique to evaluate the nonperfusion area in retinal vein occlusion1177-5483https://doaj.org/article/97088e0377e64e4982bf325872dec8362016-07-01T00:00:00Zhttps://www.dovepress.com/wide-field-optical-coherence-tomography-angiography-using-extended-fie-peer-reviewed-article-OPTHhttps://doaj.org/toc/1177-5483Masayo 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, EFIKimura MNozaki MYoshida MOgura YDove Medical Pressarticleoptical coherence tomography angiography (OCTA)retinal vein occlusion (RVO)non-perfusion areawide-field imagingOphthalmologyRE1-994ENClinical Ophthalmology, Vol 2016, Iss Issue 1, Pp 1291-1295 (2016)
institution	DOAJ
collection	DOAJ
language	EN
topic	optical coherence tomography angiography (OCTA) retinal vein occlusion (RVO) non-perfusion area wide-field imaging Ophthalmology RE1-994
spellingShingle	optical coherence tomography angiography (OCTA) retinal vein occlusion (RVO) non-perfusion area wide-field imaging Ophthalmology RE1-994 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
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
format	article
author	Kimura M Nozaki M Yoshida M Ogura Y
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
publishDate	2016
url	https://doaj.org/article/97088e0377e64e4982bf325872dec836
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Wide-field optical coherence tomography angiography using extended field imaging technique to evaluate the nonperfusion area in retinal vein occlusion

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