Indocyanine green angiography (ICGA) provides improved imaging of choroidal vasculature compared to fluorescein angiography.

2023年8月25日 · Indocyanine green angiography is an important invasive imaging modality among many diagnostic imaging modalities used in retinochoroidal diseases. It helps to study the anatomy, physiology, and pathology of choroidal and retinal circulation. It has an important role in the diagnosis of various ocular pathologies.

ICGA is an important component of multimodal imaging in the diagnosis and treatment of many degenerative, tumoral, and inflammatory diseases of the choroid and retina. This review presents the general characteristics of ICGA and a practical approach to its clinical use.

2001年8月8日 · ICG, a tricarbocyanine dye, is injected intravenously and is imaged as it passes through ocular vessels. An excitation filter with a peak at 805 nm and a barrier filter with a transmission peak of 835 nm, corresponding to the maximum fluorescence emitted by the dye in whole blood, are required.

Indocyanine green (ICG) is a water-soluble tricarbocyanine dye. ICG absorbs and emits light waves in a near-infrared portion, with maximum emission of 835 μm. This optical property of ICG enables observation of the choroid through normal eye pigment in the RPE and even through pathologies such as hemorrhages and lipid exudates.

Indocyanine Green (ICG) Angiography, often used to complement Fundus Fluorescein Angiography (FFA), is a procedure used to acquire images of the choroidal vasculature. Indocyanine Green is a water-soluble dye which is almost entirely protein-bound (98%) which limits its diffusion out of the choroidal vasculature.

2023年8月25日 · Indocyanine green has an absorption peak at 790 to 805 nm and a peak emission spectrum at 835 nm. As its absorption and emission spectrum is of a higher wavelength than that of fluorescein, the infrared rays to and from ICG can penetrate better through the RPE, macular xanthophyll pigments, and media opacities.

Indocyanine Green Angiography (ICG) is a diagnostic procedure that uses ICG dye to examine the blood flow in the CHOROID – the layer of blood vessels which lies underneath the retina. Indocyanine Green dye is injected into a vein in the arm/hand.

ICG angiography provides good video angiograms of the choroid, demonstrating choroidal vascular closure in eyes with macular involvement and hypofluorescence corre-

Indocyanine green (ICG) angiography offers the theoretical advantage of detecting abnormalities such as choroidal neovascularization (CNV) in areas that may be blocked by hemorrhage. However, ICG angiography of such eyes has not consistently produced the same images of CNV as seen by fluorescein angiography and is therefore not routinely used.