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Real-Time calibration-free C-scan images of the eye fundus using Master Slave swept source optical coherence tomography

Bradu, Adrian and Kapinchev, Konstantin and Barnes, Fred and Garway-Heath, David F. and Rajendram, Ranjan and Keane, Pearse and Podoleanu, Adrian Gh. (2015) Real-Time calibration-free C-scan images of the eye fundus using Master Slave swept source optical coherence tomography. In: Ophthalmic Technologies XXV. Proceedings of SPIE . SPIE, Bellingham, Washington. ISBN 978-1-62841-397-7. (doi:10.1117/12.2078956) (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://www.dx.doi.org/10.1117/12.2078956

Abstract

Recently, we introduced a novel Optical Coherence Tomography (OCT) method, termed as Master Slave OCT (MS-OCT), specialized for delivering en-face images. This method uses principles of spectral domain interfereometry in two stages. MS-OCT operates like a time domain OCT, selecting only signals from a chosen depth only while scanning the laser beam across the eye. Time domain OCT allows real time production of an en-face image, although relatively slowly. As a major advance, the Master Slave method allows collection of signals from any number of depths, as required by the user. The tremendous advantage in terms of parallel provision of data from numerous depths could not be fully employed by using multi core processors only. The data processing required to generate images at multiple depths simultaneously is not achievable with commodity multicore processors only. We compare here the major improvement in processing and display, brought about by using graphic cards. We demonstrate images obtained with a swept source at 100 kHz (which determines an acquisition time [Ta] for a frame of 200×200 pixels2 of Ta =1.6 s). By the end of the acquired frame being scanned, using our computing capacity, 4 simultaneous en-face images could be created in T = 0.8 s. We demonstrate that by using graphic cards, 32 en-face images can be displayed in Td 0.3 s. Other faster swept source engines can be used with no difference in terms of Td. With 32 images (or more), volumes can be created for 3D display, using en-face images, as opposed to the current technology where volumes are created using cross section OCT images.

Item Type: Book section
DOI/Identification number: 10.1117/12.2078956
Additional information: This is available as OPEN ACCESS by clicking on the URL.
Uncontrolled keywords: CUDA, en-face imaging, GPU, master slave, optical coherence tomography, parallel computing, Data handling, Laser beams, Parallel processing systems, Smart cards, Time domain analysis, Tomography, CUDA, En-face imaging, GPU, Master slave, Master-slave methods, Real-time calibration, Real-time production, Swept source optical coherence tomographies, Optical tomography
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: 20 Aug 2015 11:45 UTC
Last Modified: 24 Jul 2019 15:15 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/50234 (The current URI for this page, for reference purposes)
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