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Biomedical Optics Express

Biomedical Optics Express

  • Editor: Joseph A. Izatt
  • Vol. 4, Iss. 3 — Mar. 1, 2013
  • pp: 397–411

Automatic segmentation of the choroid in enhanced depth imaging optical coherence tomography images

Jing Tian, Pina Marziliano, Mani Baskaran, Tin Aung Tun, and Tin Aung  »View Author Affiliations

Biomedical Optics Express, Vol. 4, Issue 3, pp. 397-411 (2013)

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Enhanced Depth Imaging (EDI) optical coherence tomography (OCT) provides high-definition cross-sectional images of the choroid in vivo, and hence is used in many clinical studies. However, the quantification of the choroid depends on the manual labelings of two boundaries, Bruch’s membrane and the choroidal-scleral interface. This labeling process is tedious and subjective of inter-observer differences, hence, automatic segmentation of the choroid layer is highly desirable. In this paper, we present a fast and accurate algorithm that could segment the choroid automatically. Bruch’s membrane is detected by searching the pixel with the biggest gradient value above the retinal pigment epithelium (RPE) and the choroidal-scleral interface is delineated by finding the shortest path of the graph formed by valley pixels using Dijkstra’s algorithm. The experiments comparing automatic segmentation results with the manual labelings are conducted on 45 EDI-OCT images and the average of Dice’s Coefficient is 90.5%, which shows good consistency of the algorithm with the manual labelings. The processing time for each image is about 1.25 seconds.

© 2013 OSA

OCIS Codes
(100.0100) Image processing : Image processing
(100.2960) Image processing : Image analysis
(110.4500) Imaging systems : Optical coherence tomography
(170.4470) Medical optics and biotechnology : Ophthalmology

ToC Category:
Image Processing

Original Manuscript: October 19, 2012
Revised Manuscript: January 6, 2013
Manuscript Accepted: January 14, 2013
Published: February 11, 2013

Jing Tian, Pina Marziliano, Mani Baskaran, Tin Aung Tun, and Tin Aung, "Automatic segmentation of the choroid in enhanced depth imaging optical coherence tomography images," Biomed. Opt. Express 4, 397-411 (2013)

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