April 2010
Volume 51, Issue 13
Free
ARVO Annual Meeting Abstract  |   April 2010
Imaging of the Human Retina and Choroid With Optical Coherence Tomography at 1050 nm Combined With Active Tracking
Author Affiliations & Notes
  • B. Braaf
    Imaging Group, Rotterdam Ophthalmic Institute, Rotterdam, The Netherlands
  • V. A. D. P. Sicam
    Imaging Group, Rotterdam Ophthalmic Institute, Rotterdam, The Netherlands
  • K. A. Vermeer
    Imaging Group, Rotterdam Ophthalmic Institute, Rotterdam, The Netherlands
  • J. F. de Boer
    Imaging Group, Rotterdam Ophthalmic Institute, Rotterdam, The Netherlands
    Physics & Astronomy, VU University Amsterdam, Amsterdam, The Netherlands
  • Footnotes
    Commercial Relationships  B. Braaf, None; V.A.D.P. Sicam, None; K.A. Vermeer, None; J.F. de Boer, VU University Amsterdam / Rotterdam Ophthalmic Institute, P.
  • Footnotes
    Support  None.
Investigative Ophthalmology & Visual Science April 2010, Vol.51, 2288. doi:
  • Views
  • Share
  • Tools
    • Alerts
      ×
      This feature is available to authenticated users only.
      Sign In or Create an Account ×
    • Get Citation

      B. Braaf, V. A. D. P. Sicam, K. A. Vermeer, J. F. de Boer; Imaging of the Human Retina and Choroid With Optical Coherence Tomography at 1050 nm Combined With Active Tracking. Invest. Ophthalmol. Vis. Sci. 2010;51(13):2288.

      Download citation file:


      © ARVO (1962-2015); The Authors (2016-present)

      ×
  • Supplements
Abstract

Purpose: : To reduce motion artifacts and speckle noise in deep penetration images of the human retina and choroid by Optical Frequency Domain Imaging (OFDI) at 1050 nm.

Methods: : A high-speed (30k Hz) OFDI system operated at a center wavelength of 1050 nm is combined with an active retinal tracking system at 910 nm for lateral motion artifact free image acquisition of the human retina and choroid. Cross-sectional images taken at the same location are overlapped and averaged in post-processing to reduce the contribution of speckle noise. The amount of noise in the resulting averaged cross-sectional image is further quantified by the standard deviation of the signal intensity from areas in the vitreous.

Results: : Image averaging decreases the overall noise in the OFDI cross-sectional image with a factor of 1.5 when 2 images are used. Increasing the amount of images in the averaging process consequently increases the reduction in noise to a factor of 2.1 for 4 images and 2.4 for 8 images.

Conclusions: : The use of retinal tracking in optical coherence tomography enables image averaging for the reduction of speckle noise present in acquired OFDI cross-sectional images.

Keywords: imaging methods (CT, FA, ICG, MRI, OCT, RTA, SLO, ultrasound) • retina • choroid 
×
×

This PDF is available to Subscribers Only

Sign in or purchase a subscription to access this content. ×

You must be signed into an individual account to use this feature.

×