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Indocyanine green angiography:potentials and limitations Koichi Shimizu 1 1Dept of Ophthalmol, Gunma Univ Sch of Med pp.8-24
Published Date 1995/1/15
DOI https://doi.org/10.11477/mf.1410904133

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  • Abstract
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Indocyanine green (ICG) fundus angiography has proved to be of considerable clinical value in age-related disciform macular degeneration. It also promises to serve as a research and clinical tool in various conditions as adjunct to conventional fluorescein angiography. 1. ICG angiography allows a better obsevation of choroidal circulation as it employs infrared light which easily penetrates into deeper fundus layers. It enables assessment of the integrity of choriocapillaris layer which appears as diffuse, veil-like background fluorescence when intact. A newly developed superwide ICG angiographic technique further enables the study of choroidal vasculature beyond the sites of vortex veins. 2. It is possible to evaluate the permeability disorders of intraocular structure, including retinal vessels. ICG is far less permeable than fluorescein when the blood-ocular barriers are disrupted. This difference appears to be related to its larger mocecular weight and its tendency to readily combine with protein in the circulating blood. 3. ICG angio-graphy of the iris furnishes detailed information regarding the feeder vessels to newly formed vessels in rubeosis iridis. ICG fundus angiography does not show detailed microangiographic features, particularly those of retinal vessels. This appears to be the chief and inherent drawback of the method.


Copyright © 1995, Igaku-Shoin Ltd. All rights reserved.

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電子版ISSN 1882-1308 印刷版ISSN 0370-5579 医学書院

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