School of Physical Sciences

OCT/SLO

As part of a collaboration with Opthalmic Technologies Inc, we researched how flying spot en-face OCT could allow us how to produce OCT images with the same orientation as that in microscopy, or in scanning laser ophthalmoscopy (SLO). This allowed us to devise and assemble a dual imaging system. The system outputs pairs of OCT and confocal images. Several ophthalmology groups are now using OCT/SLO in imaging the eye.

The animation below shows the output from a joint OCT/SLO system, with the SLO image on the left and the OCT on the right. The top of the optic nerve, then the RPE and at the end the lamina cribrosa are seen in the OCT image. In the SLO image, these are visible all the time. The animation is made up from forty 3 mm x 3 mm images collected from the optic nerve in 20 seconds, with a total exploration depth of 1.5 mm.

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The images below show the assembly of a unique compact opthalmological imaging system capable en-face OCT/SLO as well as longitudinal SLO:

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Key publications from this work include:
A. Gh. Podoleanu, D. A. Jackson, Combined Optical Coherence Tomograph and Scanning Laser Ophthalmoscope, Electron. Lett., Vol. 34, No. 11, (1998) pp. 1088-1090. Key publications from this work include:
A. Gh. Podoleanu, D. A. Jackson, Combined Optical Coherence Tomograph and Scanning Laser Ophthalmoscope, Electron. Lett., Vol. 34, No. 11, (1998) pp. 1088-1090.

Sequential, instead of simultaneous, acquisition allows all the signal to be used in each of the channels (collaboration with New York eye and Ear Infirmary):
A.Gh.Podoleanu, G. M.Dobre, R. G. Cucu, R. Rosen, Sequential OCT and Confocal Imaging, Opt. Letters, 29 (4): 364-366 Feb. 15 2004

 

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Last Updated: 15/07/2011