3D-OCT 1000
Topcon 3D OCT 1000 (Topcon Medical Systems) has a scanning speed of 20,000 A-scans per second with an axial resolution of 6 µm. The SLD light source used is centered at 850 nm with a bandwidth of 50 nm. The unique feature of this device lies in its integration of a true color non-mydriatic fundus camera, in addition to the spectral-domain OCT.
Pinpoint registration of OCT scans is possible by the automatic placement of the OCT projection image (OCT C-scan: enface view of a series of sequential OCT scans down the fundus put together) onto the color fundus image. Besides being a cost and space saving option, this setup makes the correlation of specific lesions observed on the color fundus photo to the corresponding OCT image possible.
Various overlays, such as the topographic retinal thickness map and projection image, may be placed over the fundus photo simultaneously with different fundus grids, such as the EDTRS-like map, rectangular map (5 mm x 5 mm map with six boxes horizontally and vertically) and volume map. The superposition of the retinal thickness map with the EDTRS-like map helps to detect eccentric fixation (See Figure 3), which can then be corrected manually.
In addition, the 3D OCT 1000 software interfaces smoothly with IMAGEnet and integrates with other types of images like fluorescein and indocyanine green angiography, red-free and autofluorescence and thus it is possible to register fluorescein and other image types and register them to OCT scans.
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