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Optics Express

Optics Express

  • Editor: Michael Duncan
  • Vol. 13, Iss. 20 — Oct. 3, 2005
  • pp: 7937–7947

Advanced scanning methods with tracking optical coherence tomography

Daniel X. Hammer, R. Daniel Ferguson, Nicusor V. Iftimia, Teoman Ustun, Gadi Wollstein, Hiroshi Ishikawa, Michelle L. Gabriele, William D. Dilworth, Larry Kagemann, and Joel S. Schuman  »View Author Affiliations

Optics Express, Vol. 13, Issue 20, pp. 7937-7947 (2005)

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An upgraded optical coherence tomography system with integrated retinal tracker (TOCT) was developed. The upgraded system uses improved components to extend the tracking bandwidth, fully integrates the tracking hardware into the optical head of the clinical OCT system, and operates from a single software platform. The system was able to achieve transverse scan registration with sub-pixel accuracy (∼10 μm). We demonstrate several advanced scan sequences with the TOCT, including composite scans averaged (co-added) from multiple B-scans taken consecutively and several hours apart, en face images collected by summing the A-scans of circular, line, and raster scans, and three-dimensional (3D) retinal maps of the fovea and optic disc. The new system achieves highly accurate OCT scan registration yielding composite images with significantly improved spatial resolution, increased signal-to-noise ratio, and reduced speckle while maintaining well-defined boundaries and sharp fine structure compared to single scans. Precise re-registration of multiple scans over separate imaging sessions demonstrates TOCT utility for longitudinal studies. En face images and 3D data cubes generated from these data reveal high fidelity image registration with tracking, despite scan durations of more than one minute.

© 2005 Optical Society of America

OCIS Codes
(170.3880) Medical optics and biotechnology : Medical and biological imaging
(170.4470) Medical optics and biotechnology : Ophthalmology
(170.4500) Medical optics and biotechnology : Optical coherence tomography

ToC Category:
Research Papers

Original Manuscript: August 3, 2005
Revised Manuscript: September 16, 2005
Published: October 3, 2005

Daniel Hammer, R. Daniel Ferguson, Nicusor Iftimia, Teoman Ustun, Gadi Wollstein, Hiroshi Ishikawa, Michelle Gabriele, William Dilworth, Larry Kagemann, and Joel Schuman, "Advanced scanning methods with tracking optical coherence tomography," Opt. Express 13, 7937-7947 (2005)

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