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Aljoscha S. Neubauer, Lukas Reznicek, Thomas Klein, Wolfgang Wieser, Christoph M. Eigenwillig, Benjamin Biedermann, Anselm Kampik, Robert Huber; Ultra High-Speed Ultrawide Field Swept Source OCT Reconstructed Fundus Image Quality. Invest. Ophthalmol. Vis. Sci. 2011;52(14):1327.
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© ARVO (1962-2015); The Authors (2016-present)
To investigate the image quality of reconstructed fundus images based on swept source Fourier domain mode locking (FDML) OCT compared to other fundus imaging devices.
A 1050nm swept source FDML OCT was constructed running at 685 kHz covering ~70° field of view. Imaging of 11 normal eyes was performed with the device at 1900x1900 pixels. Imaging results were compared side-by-side and overlayed to color fundus images (50°) and ultra wide field scanning laser images (Optomap).
The field of view covered by the OCT device clearly exceeded the area covered by fundus photography, while Optomap imaged further - to/over the equator- as a reference. The reconstructed OCT images had the highest contrast and image sharpness - as judged from retinal structures such as vessels and optic disc - closely followed by the scanning laser ophthalmoscope applied. The quality of both is exceeding the fundus camera image quality. The reconstructed OCT fundus images could be sectioned at different levels such as inner retina or choroid by software averaging of different z-layers.
Reconstructing fundus images from high-speed ultra wide field OCT is feasible and delivers a useful field of view and very high image quality compared to other fundus imaging modalities.
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