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Proceedings Paper

Choroidal imaging by one-micrometer dual-beam Doppler optical coherence angiography with adjustable velocity range
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Paper Abstract

Ability of a new version of one-micrometer dual-beam optical coherence angiography (OCA) based on Doppler optical coherence tomography (OCT), is demonstrated for choroidal vasculature imaging. A particular feature of this system is the adjustable time delay between two probe beams. This allows changing the measurable velocity range of moving constituents such as blood without alteration of the scanning protocol. Since choroidal vasculature is made of vessels having blood flows with different velocities, this technique provides a way of discriminating vessels according to the velocity range of their inner flow. An example of choroid imaging of a normal emmetropic eye is here given. It is shown that combining images acquired with different velocity ranges provides an enhanced vasculature representation. This method may be then useful for pathological choroid characterization.

Paper Details

Date Published: 9 March 2012
PDF: 6 pages
Proc. SPIE 8209, Ophthalmic Technologies XXII, 82090M (9 March 2012); doi: 10.1117/12.907718
Show Author Affiliations
Franck Jaillon, Univ. of Tsukuba (Japan)
Computational Optics and Ophthalmology Group (Japan)
Shuichi Makita, Univ. of Tsukuba (Japan)
Computational Optics and Ophthalmology Group (Japan)
Yoshiaki Yasuno, Univ. of Tsukuba (Japan)
Computational Optics and Ophthalmology Group (Japan)

Published in SPIE Proceedings Vol. 8209:
Ophthalmic Technologies XXII
Fabrice Manns; Per G. Söderberg; Arthur Ho, Editor(s)

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