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Thomas Klein, Lukas Reznicek, Wolfgang Wieser, Christoph M. Eigenwillig, Benjamin Biedermann, Anselm Kampik, Robert Huber, Aljoscha S. Neubauer; Extraction of Arbitrary OCT Scan Paths from 3D Ultra High-Speed Ultra Wide-Field Swept Source OCT. Invest. Ophthalmol. Vis. Sci. 2011;52(14):1328.
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To obtain custom OCT scans without the need to predefine regions of interest (ROI) in order to adequately image retinal pathologies. Custom OCT scans have been reconstructed from a single ultra high-speed ultra wide-field swept source OCT scan.
A 1050nm swept source FDML OCT was constructed running at 685 kHz axial scan rate covering approx. 70° field of view. Imaging of 4 normal eyes was performed with the device at 1900x1900 A-scans. From the obtained high resolution 3D OCT dataset image processing with Labview was performed and clinically meaningful custom OCT scans were constructed.
From all 3D datasets custom OCT scan patterns could be constructed. Various circular scans around the optic disc, arched scans following the retinal vessels and nerve fibers and macular circles were extracted from the 3D dataset. In addition, by choosing various z-levels vitreous and choroid could be reconstructed over the posterior pole including both, macula and optic disc.
Reconstructing custom OCT scans from ultra high-speed ultra wide field 3D OCT datasets is feasible. This technology removes the current need to predefine ROI because those ROI scans can be reconstructed from the densely sampled 3D dataset with high resolution in post processing.
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