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DA Orlock; Combined SLO/OCT Imaging . Invest. Ophthalmol. Vis. Sci. 2002;43(13):2858.
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© ARVO (1962-2015); The Authors (2016-present)
Purpose: To demonstrate a new investigative imaging system for the eye, which combines confocal Scanning Laser Ophthalmoscope and Optical Coherence Tomography (SLO/OCT) technologies in a single device. The images are generated from a single source SLD (Superluminescent Diode) with a wavelength of 850nm. The reflected light from the fundus is split into two optical processing channels, one yielding an OCT image and the other, an SLO image. The OCT images can be displayed as longitudinal scans (Depth display along the optical axis) or as C-Scan en-face images (Depth displayed plane which is perpendicular to the optical axis). The SLO image can be used as alignment and reference for the OCT depth-related images or as a tool for assisting in the evaluation of the fundus image and an orientation of the OCT images. Methods: Twenty patients with retinal diseases were scanned with SLO/OCT prototype and conventional OCT. Results: This new device seems to better differentiate the layers of retina and the pathologies within the retina when compared to the conventional OCT images. The C-Scan (en-face) imaging introduces the possibility of viewing inner layers of the retina in parallel planes, and evaluating thickness and elevation changes more precisely. Conclusion: This prototype has a higher resolution than other OCT systems available today. This new technology enables us to use the OCT information in a three-dimensional format. This makes it possible to perform volumetric measurements and topographic mapping of both the retina and the optic nerve. Further studies are needed do help determine future clinical applications
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