May 2008
Volume 49, Issue 13
Free
ARVO Annual Meeting Abstract  |   May 2008
Three-Dimensional Imaging of Trabeculectomy Blebs Using Swept-Source Optical Coherence Tomography
Author Affiliations & Notes
  • M. Nakanishi
    Kitasato University, Sagamihara, Japan
    Ophthalmology,
  • R. Yoshimura
    Kitasato University, Sagamihara, Japan
    Center for Natural Science,
  • D. Choi
    Kitasato University, Sagamihara, Japan
    Center for Natural Science,
  • H. Hiro-oka
    Kitasato University, Sagamihara, Japan
    Center for Natural Science,
  • H. Furukawa
    Kitasato University, Sagamihara, Japan
    Center for Natural Science,
  • K. Ohbayashi
    Kitasato University, Sagamihara, Japan
    Center for Natural Science,
  • T. Morita
    Kitasato University, Sagamihara, Japan
    Ophthalmology,
  • N. Shoji
    Kitasato University, Sagamihara, Japan
    Rehabilitation, Orthoptics and Visual Science Course,
  • K. Shimizu
    Kitasato University, Sagamihara, Japan
    Ophthalmology,
  • Footnotes
    Commercial Relationships  M. Nakanishi, None; R. Yoshimura, None; D. Choi, None; H. Hiro-oka, None; H. Furukawa, None; K. Ohbayashi, None; T. Morita, None; N. Shoji, None; K. Shimizu, None.
  • Footnotes
    Support  JST Grant
Investigative Ophthalmology & Visual Science May 2008, Vol.49, 612. doi:https://doi.org/
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    • Get Citation

      M. Nakanishi, R. Yoshimura, D. Choi, H. Hiro-oka, H. Furukawa, K. Ohbayashi, T. Morita, N. Shoji, K. Shimizu; Three-Dimensional Imaging of Trabeculectomy Blebs Using Swept-Source Optical Coherence Tomography. Invest. Ophthalmol. Vis. Sci. 2008;49(13):612. doi: https://doi.org/.

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

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Abstract

Purpose: : To evaluate three-dimensional images of trabeculectomy blebs using Swept-Source optical coherence tomography (SS-OCT).

Methods: : Our SS-OCT system utilizes superstructure-grating distributed Bragg reflector (SSG-DBR) laser, developed at NTT Photonics Laboratories. SSG-DBR laser has characteristics of scanning wavelength with discrete stepwise tuning and consequently the interference length became longer than ordinary SS-OCT system used a light source with a continuous range of scanning wavelength. Three-dimensional imagings of trabeculectomy blebs were performed with sufficient depth ranges.

Results: : The tuning range of SSG-DBR laser, set from 1560 to 1640 nm with an increment of 0.1 nm tuning step, which is also the same as the L-LL band used in the telecommunication market, enables SS-OCT to provide an axial resolution of less than 10 µm in the ocular tissue. Because of its high frequency interval (16.5 GHz) and high scanning speed (15 KHz A-line rate), the imaging analysis in depth of 6 mm became possible. Five blebs in eyes of five patients were imaged. Two avascular blebs had fluid-filled spaces, and the images clearly showed distinct layers in the blebs.

Conclusions: : The SS-OCT demonstrated a three-dimensional imaging of trabeculectomy blebs. We were able to observe details of blebs in all subjects. The imaging obtained by SS-OCT may be useful for evaluating functions of trabeculectomy blebs.

Keywords: imaging methods (CT, FA, ICG, MRI, OCT, RTA, SLO, ultrasound) • anterior segment • anterior chamber 
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