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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 18, Iss. 5 — Mar. 1, 2010
  • pp: 4898–4919

Fast dispersion encoded full range optical coherence tomography for retinal imaging at 800 nm and 1060 nm

Bernd Hofer, Boris Považay, Angelika Unterhuber, Ling Wang, Boris Hermann, Sara Rey, Gerald Matz, and Wolfgang Drexler  »View Author Affiliations

Optics Express, Vol. 18, Issue 5, pp. 4898-4919 (2010)

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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.

© 2010 Optical Society of America

OCIS Codes
(100.3010) Image processing : Image reconstruction techniques
(100.3020) Image processing : Image reconstruction-restoration
(100.5070) Image processing : Phase retrieval
(110.4500) Imaging systems : Optical coherence tomography
(170.4500) Medical optics and biotechnology : Optical coherence tomography
(300.6300) Spectroscopy : Spectroscopy, Fourier transforms

ToC Category:
Image Processing

Original Manuscript: January 5, 2010
Revised Manuscript: February 9, 2010
Manuscript Accepted: February 12, 2010
Published: February 24, 2010

Virtual Issues
Vol. 5, Iss. 6 Virtual Journal for Biomedical Optics

Bernd Hofer, Boris Považay, Angelika Unterhuber, Ling Wang, Boris Hermann, Sara Rey, Gerald Matz, and Wolfgang Drexler, "Fast dispersion encoded full range optical coherence tomography for retinal imaging at 800 nm and 1060 nm," Opt. Express 18, 4898-4919 (2010)

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