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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 19, Iss. 21 — Oct. 10, 2011
  • pp: 20886–20903

Optics InfoBase > Optics Express > Volume 19 > Issue 21 > Page 20886

Phase-stabilized optical frequency domain imaging at 1-µm for the measurement of blood flow in the human choroid

Boy Braaf, Koenraad A. Vermeer, Victor Arni D.P. Sicam, Elsbeth van Zeeburg, Jan C. van Meurs, and Johannes F. de Boer  »View Author Affiliations


Optics Express, Vol. 19, Issue 21, pp. 20886-20903 (2011)
http://dx.doi.org/10.1364/OE.19.020886


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Abstract

In optical frequency domain imaging (OFDI) the measurement of interference fringes is not exactly reproducible due to small instabilities in the swept-source laser, the interferometer and the data-acquisition hardware. The resulting variation in wavenumber sampling makes phase-resolved detection and the removal of fixed-pattern noise challenging in OFDI. In this paper this problem is solved by a new post-processing method in which interference fringes are resampled to the exact same wavenumber space using a simultaneously recorded calibration signal. This method is implemented in a high-speed (100 kHz) high-resolution (6.5 µm) OFDI system at 1-µm and is used for the removal of fixed-pattern noise artifacts and for phase-resolved blood flow measurements in the human choroid. The system performed close to the shot-noise limit (<1dB) with a sensitivity of 99.1 dB for a 1.7 mW sample arm power. Suppression of fixed-pattern noise artifacts is shown up to 39.0 dB which effectively removes all artifacts from the OFDI-images. The clinical potential of the system is shown by the detection of choroidal blood flow in a healthy volunteer and the detection of tissue reperfusion in a patient after a retinal pigment epithelium and choroid transplantation.

© 2011 OSA

OCIS Codes
(110.0110) Imaging systems : Imaging systems
(110.4500) Imaging systems : Optical coherence tomography
(170.3880) Medical optics and biotechnology : Medical and biological imaging
(170.4470) Medical optics and biotechnology : Ophthalmology
(280.2490) Remote sensing and sensors : Flow diagnostics

ToC Category:
Medical Optics and Biotechnology

History
Original Manuscript: July 5, 2011
Revised Manuscript: September 10, 2011
Manuscript Accepted: September 17, 2011
Published: October 5, 2011

Virtual Issues
Vol. 6, Iss. 11 Virtual Journal for Biomedical Optics

Citation
Boy Braaf, Koenraad A. Vermeer, Victor Arni D.P. Sicam, Elsbeth van Zeeburg, Jan C. van Meurs, and Johannes F. de Boer, "Phase-stabilized optical frequency domain imaging at 1-µm for the measurement of blood flow in the human choroid," Opt. Express 19, 20886-20903 (2011)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-19-21-20886


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