Title: Fast dispersion encoded full range optical coherence tomography for retinal imaging at 800 nm and 1060 nm
Authors: Hofer, Bernd ×
Povazay, Boris
Unterhuber, Angelika
Wang, Ling
Hermann, Boris
Rey, Sara
Matz, Gerald
Drexler, Wolfgang #
Issue Date: Mar-2010
Publisher: Optical Society of America
Series Title: Optics Express vol:18 issue:5 pages:4898-919
Article number: 10.1364/OE.18.004898
Abstract: The dispersion mismatch between sample and reference arm in frequency-domain optical coherence tomography (OCT) can be used to iteratively suppress complex conjugate artifacts and thereby increase the imaging range. In this paper, we propose a fast dispersion encoded full range (DEFR) algorithm that detects multiple signal components per iteration. The influence of different dispersion levels on the reconstruction quality is analyzed experimentally using a multilayered scattering phantom and in vivo retinal tomograms at 800 nm. Best results have been achieved with 30 mm SF11, with neglectable resolution decrease due to finite resolution of the spectrometer. Our fast DEFR algorithm achieves an average suppression ratio of 55 dB and typically converges within 5 to 10 iterations. The processing time on non-dedicated hardware was 5 to 10 seconds for tomograms with 512 depth scans and 4096 sampling points per depth scan. Application of DEFR to the more challenging 1060 nm wavelength region is also demonstrated by introducing an additional optical fibre in the sample arm.
ISSN: 1094-4087
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Non-KU Leuven Association publications
× corresponding author
# (joint) last author

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