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Dual SLO/T-scan based en face ultrahigh resolution OCT for ophthalmic imaging

Cucu, R.G., Podoleanu, Adrian G.H., Pedro, J., Rogers, J.A., Rosen, R.B., Van Velthoven, M., Garcia, P., Shidlovski, V. (2006) Dual SLO/T-scan based en face ultrahigh resolution OCT for ophthalmic imaging. In: SPIE Proceedings Series. Proceedings of SPIE - The International Society for Optical Engineering. 6079. Spie-Int Soc Optical Engineering ISBN 0-8194-6121-0. (doi:10.1117/12.649047) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided)

The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided. (Contact us about this Publication)
Official URL
http://dx.doi.org/10.1117/12.649047

Abstract

We report a versatile imaging system combining scanning laser ophthalmoscopy (SLO) and T-scan based en face ultrahigh resolution optical coherence tomography (OCT). The image carrier is generated using the optical path difference modulation introduced by the X-Y galvo-scanner mirrors specific to en face OCT (without optical modulators in the reference arm). The light source is a compact superluminescent diode based source with 150 nm FWHM spectrum, centered at 890 nm. We demonstrate en face B-scan and C-scan ultrahigh resolution OCT imaging of the human retina in vivo, with an axial resolution of 3.2 μm in tissue. The system is capable of acquiring large lateral size ultrahigh resolution OCT scans of a maximum field size of 20°. The acquisition speed is up to 2 frames/s for both OCT B-scans and C-scans. The measured system sensitivity is more than 98 dB, for a power level to the target of 1 mW and maximum lateral scan size. The C-scans are, to the best of our knowledge, the first and the largest size reported ultrahigh resolution C-scans of the human retina in vivo. The instrument is assembled on a chin rest and ready to be used for clinical imaging. SLO and ultrahigh resolution OCT C-scans are acquired simultaneously and displayed side by side. This allows users in a clinical environment to correlate details of the same feature in the area of interest in both images and also choose precisely in the SLO image the location where to perform the ultrahigh resolution en face B-scan.

Item Type: Conference or workshop item (Proceeding)
DOI/Identification number: 10.1117/12.649047
Uncontrolled keywords: Combined simultaneous SLO/OCT imaging, en face scanning, T-scan, Ultrahigh resolution OCT, Imaging systems, Ophthalmology, Optical resolving power, Tomography, Combined simultaneous SLO/OCT imaging, en face scanning, T-scan, Ultrahigh resolution OCT, Medical imaging
Subjects: Q Science > QC Physics
R Medicine > R Medicine (General) > R857.O6 Optical coherence tomography
Divisions: Faculties > Sciences > School of Physical Sciences > Applied Optics Group
Depositing User: Giles Tarver
Date Deposited: 24 Jul 2015 14:52 UTC
Last Modified: 29 May 2019 14:54 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/49752 (The current URI for this page, for reference purposes)
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