アラカワ　ヒサヤ   Arakawa Hisaya   荒川　久弥    所属   医学部 医学科（附属八千代医療センター）    職種   助教
論文種別	原著
言語種別	英語
査読の有無	査読あり
表題	CHOROIDAL BLOOD VESSELS IN RETINAL PIGMENT EPITHELIAL ATROPHY USING OPTICAL COHERENCE TOMOGRAPHY ANGIOGRAPHY.
掲載誌名	正式名：Retinal cases & brief reports 略　 称：Retin Cases Brief Rep ISSNコード：19371578/19351089
掲載区分	国外
巻・号・頁	13(1),pp.88-93
著者・共著者	Maruko Ichiro, Koizumi Hideki, Sawaguchi Shota, Hasegawa Taiji, Arakawa Hisaya, Iida Tomohiro
発行年月	2019
概要	PURPOSE:To observe choroidal blood vessels in cases sharply demarcated with retinal pigment epithelium (RPE) atrophy at the macular area using en-face optical coherence tomography angiography (OCTA) and standard en-face optical coherence tomography (OCT).METHODS:The retrospective study included 12 eyes (8 patients; 5 men, 3 women; average age, 64.3 years) with RPE atrophy seen by ophthalmoscopy. The macular areas with normal and atrophic RPE sections were examined using en-face OCTA with an 840-nm light source (RTVue XR Avanti; Optovue Inc), which system can obtain standard en-face OCT images at identical areas. Images on en-face OCTA and standard en-face OCT were compared with each other when the segmentation range was being set as the full thickness of the choroid by the attached software.RESULTS:Choroidal blood vessels were seen as black on standard en-face OCT images in all cases. However, the choroidal vessels on OCTA were depicted as white in the RPE atrophic area and black in the normal areas.CONCLUSION:Choroidal blood vessels in the normal sections of RPE were visualized in black on standard en-face OCT and OCTA with an 840-nm light source; however, those in the atrophic parts were observed as white, or with bloodstream, on OCTA images. Choroidal blood vessels cannot be evaluated accurately in commercially available OCTA systems because of blockage of light by the RPE.
DOI	10.1097/ICB.0000000000000542
PMID	28092315