May 2006
Volume 47, Issue 13
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ARVO Annual Meeting Abstract  |   May 2006
Comparison of Optic Disc Margin Identified by Planimetry and High Speed Ultrahigh–Resolution Optical Coherence Tomography (Spectral OCT, SOCT)
J.S. Kim; A. Manassakorn; H. Ishikawa; G. Wollstein; R.A. Bilonick; L. Kagemann; K. Sung; J.S. Duker; J.G. Fujimoto; J.S. Schuman
Author Affiliations & Notes
  • J.S. Kim
    UPMC Eye Center, Ophthalmology and Visual Science Research Center, Eye and Ear Institute, Department of Ophthalmology, University of Pittsburgh School of Medicine, Pittsburgh, PA
  • A. Manassakorn
    UPMC Eye Center, Ophthalmology and Visual Science Research Center, Eye and Ear Institute, Department of Ophthalmology, University of Pittsburgh School of Medicine, Pittsburgh, PA
  • H. Ishikawa
    UPMC Eye Center, Ophthalmology and Visual Science Research Center, Eye and Ear Institute, Department of Ophthalmology, University of Pittsburgh School of Medicine, Pittsburgh, PA
  • G. Wollstein
    UPMC Eye Center, Ophthalmology and Visual Science Research Center, Eye and Ear Institute, Department of Ophthalmology, University of Pittsburgh School of Medicine, Pittsburgh, PA
  • R.A. Bilonick
    UPMC Eye Center, Ophthalmology and Visual Science Research Center, Eye and Ear Institute, Department of Ophthalmology, University of Pittsburgh School of Medicine, Pittsburgh, PA
  • L. Kagemann
    UPMC Eye Center, Ophthalmology and Visual Science Research Center, Eye and Ear Institute, Department of Ophthalmology, University of Pittsburgh School of Medicine, Pittsburgh, PA
  • K. Sung
    UPMC Eye Center, Ophthalmology and Visual Science Research Center, Eye and Ear Institute, Department of Ophthalmology, University of Pittsburgh School of Medicine, Pittsburgh, PA
  • J.S. Duker
    New England Eye Center, Tufts–New England Medical Center, Boston, MA
  • J.G. Fujimoto
    Dept. of Electrical Engineering and Computer Science and Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, MA
  • J.S. Schuman
    UPMC Eye Center, Ophthalmology and Visual Science Research Center, Eye and Ear Institute, Department of Ophthalmology, University of Pittsburgh School of Medicine, Pittsburgh, PA
  • Footnotes
    Commercial Relationships  J.S. Kim, None; A. Manassakorn, None; H. Ishikawa, None; G. Wollstein, None; R.A. Bilonick, None; L. Kagemann, None; K. Sung, None; J.S. Duker, None; J.G. Fujimoto, Carl Zeiss Meditec, Inc., P; J.S. Schuman, Carl Zeiss Meditec, Inc., C; Carl Zeiss Meditec, Inc., P.
  • Footnotes
    Support  NIH Grants RO1–EY013178–6, RO1–EY11289–20, and P30–EY008098, Research to Prevent Blindness and The Eye and Ear Foundation (Pittsburgh) NSF ECS–0119452, AFOSR FA9550–040–1–0046
Investigative Ophthalmology & Visual Science May 2006, Vol.47, 3642. doi:
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      J.S. Kim, A. Manassakorn, H. Ishikawa, G. Wollstein, R.A. Bilonick, L. Kagemann, K. Sung, J.S. Duker, J.G. Fujimoto, J.S. Schuman; Comparison of Optic Disc Margin Identified by Planimetry and High Speed Ultrahigh–Resolution Optical Coherence Tomography (Spectral OCT, SOCT) . Invest. Ophthalmol. Vis. Sci. 2006;47(13):3642.

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Abstract
 
Purpose:
 

OCT defines the optic disc margin as the termination of the retinal pigment epithelium (RPE) layer. The purpose of this study was to test the hypothesis that OCT accurately measures the optic disc margin when compared to the planimetrically defined disc margin using conventional fundus camera and three dimensional SOCT.

 
Methods:
 

Seventeen healthy subjects (17 eyes) had stereo optic disc photographs (DPs) and SOCT raster scans (180 frames, 501 samplings/frame) centered on the optic nerve head. Two image outputs were derived from the SOCT data set: an en–face OCT fundus image and a set of 180 frames of cross–sectional images. Three ophthalmologists independently marked the optic disc margin on the DP, en–face, and cross–sectional images in a randomized masked fashion using custom made software. One observer rotated, shifted, and scaled DPs to match the en–face image, and the disc margin markings were adjusted accordingly for all observers. Disc size (area, horizontal and vertical diameters) and location of the center of gravity were compared between DP and en–face and cross–sectional images.

 
Results:
 

The location of the center of gravity was similar among the three methods. Overestimation of disc size, in the cross–sectional images, was associated with peripapillary atrophy.  

Image not available
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Image not available
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Conclusions:
 

The optic disc margin as defined by OCT is significantly different than the margin defined by DP planimetry. The OCT cross–sectional definition overestimates the disc size due to the inclusion of peripapillary atrophy.

 
Keywords: optic disc • imaging/image analysis: clinical • imaging methods (CT, FA, ICG, MRI, OCT, RTA, SLO, ultrasound) 
© 2006, The Association for Research in Vision and Ophthalmology, Inc., all rights reserved. Permission to republish any abstract or part of an abstract in any form must be obtained in writing from the ARVO Office prior to publication.
Copyright © 2024 Association for Research in Vision and Ophthalmology.
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