DISPLAYED REFLECTIVITY OF CHOROIDAL NEOVASCULAR MEMBRANES BY OPTICAL COHERENCE TOMOGRAPHY CORRELATES WITH PRESENCE OF LEAKAGE BY FLUORESCEIN ANGIOGRAPHY

Purpose: To evaluate and correlate the displayed optical reflectivity of choroidal neovascularization (CNV) subretinal material on spectral-domain optical coherence tomography with the presence of dye leakage on fluorescein angiography (FA). Methods: Thirty-nine eyes of 39 patients with a diagnosis of predominantly classic CNV from age-related macular degeneration underwent simultaneous spectral-domain optical coherence tomography and FA imaging. Eight patients had a newly diagnosed untreated CNV. Thirty-one patients had already been treated with anti-vascular endothelial growth factor agents. In 18 of these eyes, CNV lesions showed persistent leakage on FA. In 13 eyes, CNV lesions did not show leakage by FA. Subretinal CNV material boundaries visualized on spectral-domain optical coherence tomography B-scans were manually traced, and optical reflectivity was calculated using the mean grayscale value. To account for variable image brightness, the retinal pigment epithelial reflectivity was measured. The absolute difference between CNV material and retinal pigment epithelial reflectivity (Delta REF) from the three groups (newly diagnosed CNV, previously treated CNV showing FA leakage, and previously treated CNV not showing FA leakage) was compared. Results: In untreated lesions, Delta REF was significantly higher compared with previously treated, but still leaky CNV (P < 0.0001). Lesions showing FA leakage had significantly higher Delta REF compared with those that did not display leakage (P < 0.0001). Conclusion: The displayed reflectivity of subretinal CNV material in spectral-domain optical coherence tomography appears to be an important parameter that can provide information regarding the FA leakage status. RETINA 31:942-948, 2011