High-resolution Fourier-domain optical coherence tomography of choroidal neovascular membranes associated with age-related macular degeneration.

Abstract

PURPOSE To investigate the use of high-resolution Fourier-domain optical coherence tomography (Fd-OCT) to image choroidal neovascular membranes (CNVMs) associated with exudative age-related macular degeneration (eAMD). METHODS An Fd-OCT instrument with axial resolution of 4 to 4.5 microm and transverse resolution of 10 to 15 microm was used to image 21 eyes (19 subjects) with newly diagnosed eAMD. A raster series of 100 B-scans separated by 60 microm was used to study the growth pattern of CNVM and associated morphologic changes. CNVM size was determined using 250 to 300 serial virtual C-scans of reconstructed three-dimensional macular volume. RESULTS A highly reflective subretinal and/or subretinal pigment epithelial (RPE) lesion that co-localized with the CNVM seen on fluorescein angiography was detected in all eyes by Fd-OCT. Although a combined subretinal and sub-RPE growth pattern of various degrees was noted in 15 (71%) eyes, a statistically significant difference in the distribution of growth pattern was noted when classic CNVM was compared with occult CNVM (chi(2) = 10.4, df = 2, P < 0.005). Classic lesions had >90% subretinal growth pattern, whereas occult lesions had a more variable growth pattern. Angiographic CNVM size correlated with size on Fd-OCT but correlation was better for classic CNVM (classic, r = 0.99, P < 0.0001; nonclassic, r = 0.78, P < 0.001). CONCLUSIONS Fd-OCT is a promising potential alternative modality to visualize CNVM with AMD. Angiographic lesion size and type correlated with growth pattern and size of CNVM on Fd-OCT, with correlation being stronger for classic lesions.

DOI: 10.1167/iovs.09-4256

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@article{Park2010HighresolutionFO, title={High-resolution Fourier-domain optical coherence tomography of choroidal neovascular membranes associated with age-related macular degeneration.}, author={S S Park and Steven Truong and Robert J Zawadzki and Suhail Alam and Stacey Choi and David G. Telander and John Werner and Lawrence S. Morse}, journal={Investigative ophthalmology & visual science}, year={2010}, volume={51 8}, pages={4200-6} }