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F. D. Verbraak, P. H. B. Kok, D. J. Faber, H. R. de Vries, H. W. van Dijk, M. E. J. van Velthoven, T. G. van Leeuwen; A Comparison of Fourier Domain , Slitlamp Mounted, Optical Coherence Tomography Scans With Scans Made by an OCT Stratus (Zeiss) , and a 3D OCT-1000 (Topcon). Invest. Ophthalmol. Vis. Sci. 2008;49(13):1846.
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© ARVO (1962-2015); The Authors (2016-present)
To compare images made with a new FD-OCT device, mounted on a slitlamp with images of the same region made with OCT Stratus (Zeiss), and 3D OCT-1000 (Topcon).
Images were made in selected patients, with representative macular pathology with a newly developed FD OCT scanning device integrated into a common slitlamp (figure 1). OCT characteristics: central wavelength 830 nm, bandwidth 30 nm, resolution in tissue 8 micron, scanning speed 1000 a-scan per sec, one b-scan in 0.2 sec, scandepth 2 mm. Scans are made through a handheld lens (Volk 60 D), while simultaneously the (lesion in the) retina can be observed, with the slitlamp. A color fundus photography of the observed area is made at the same time (Topcon camera DC1, resolution = 3.24 Mp).In the same patients line scans were made with the OCT Stratus and 3D volumes scans were made with the 3D OCT-1000. Scans made at approximately the same location were subjectively compared with respect to quality of the images.
With the new device scans could be made without difficulty in all patients with a reasonably clear retinal image on slitlamp examination. Examples of scans made with the 3 devices of patients are shown. (see figure 2 to 5). The quality of the scans made with the new device is better than the OCT Stratus, and slighly less than the 3D OCT-1000.
Quality of the scans made with the new device compare favourably with TD-OCT images (OCTStratus, Zeiss), and are slightly less than scans made with dedicated FD-OCT systems. The ease of use and the instanteneous availablity of results of OCT examination, during a regular clinical examination, could be very usefull in daily practice.
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