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Ultrahigh-Resolution Combined Coronal Optical Coherence Tomography Confocal Scanning Ophthalmoscope (OCT/SLO): A pilot study

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Summary

OBJECTIVE: To evaluate clinical images from a prototype ultrahigh resolution (UHR) combined coronal optical coherence tomography/confocal scanning ophthalmoscope (OCT/SLO) and to compare them to standard-resolution OCT/SLO images on the same patients. DESIGN: Cross-sectional pilot-study. PARTICIPANTS: Sixty-six eyes of 42 patients with various macular pathologies, such as age-related macular degeneration, macular edema, macular hole, central serous retinopathy, epiretinal membrane and posterior vitreous traction syndrome. METHODS: Each subject was first scanned with a standard-resolution OCT/SLO that has an axial resolution of ∼10 micron. Immediately following, patients were scanned with the prototype UHR OCT/SLO device. The UHR system employs a compact super luminescent diode (SLD) with a 150 nm bandwidth centered at 890 nm, which allows imaging of the retina with an axial resolution of 3 microns. Both coronal and longitudinal OCT scans were acquired with each system, and compared side-by-side. Scan quality was assessed for the observer's ability to visualize the vitreo-retinal interface and retinal layers – in particular of the outer retina/RPE/choroidal interface, increased discrimination of pathological changes, and better signal intensity. MAIN OUTCOME MEASURES: Ultrahigh and standard-resolution coronal and longitudinal OCT/SLO images of macular pathologies. RESULTS: In the side-by-side comparison with the commercial standard-resolution OCT/SLO images, the scans in the Ultrahigh resolution OCT/SLO images were superior in 85% of cases. Relatively poor quality images were attributed to lower signal-to-noise ratio, limited focusing, or media opacities. Several images that had a better signal intensity in the standard-resolution OCT/SLO system were found to show more retinal detail in the UHR system. In general, intraretinal layers in the UHR OCT/SLO images were better delineated in both coronal and longitudinal scans. Enhanced details were also seen in the outer retina/RPE/choroidal complex. The UHR OCT/SLO system produced better definition of morphological changes in several macular pathologies. CONCLUSIONS: Broadband SLD-based UHR OCT/SLO offers a compact, efficient, and economic enhancement to the currently available clinical OCT imaging systems. UHR OCT/SLO imaging enhanced the quality of the OCT C-scans, facilitated appreciation of vitreo-retinal pathologies, and improved sensitivity to small changes in the retina, and the outer retina/RPE/choroidal interface.

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Authors and Affiliations

  1. Department of Ophthalmology, Academic Medical Center, Amsterdam, The Netherlands

    M. E. J. van Velthoven & M. D. de Smet

  2. Advanced Retinal Imaging Laboratory, New York Eye and Ear Infirmary, New York, NY, USA

    R. B. Rosen, M. E. J. van Velthoven, P. M. T. Garcia & T. O. Muldoon

  3. Applied Optics Group, University of Kent, Canterbury, UK

    R. G. Cucu & A. Gh. Podoleanu

Authors
  1. R. B. Rosen
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  2. M. E. J. van Velthoven
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  3. P. M. T. Garcia
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  4. R. G. Cucu
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  5. M. D. de Smet
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  6. T. O. Muldoon
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  7. A. Gh. Podoleanu
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Correspondence to R. B. Rosen.

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Rosen, R., van Velthoven, M., Garcia, P. et al. Ultrahigh-Resolution Combined Coronal Optical Coherence Tomography Confocal Scanning Ophthalmoscope (OCT/SLO): A pilot study. Spektrum Augenheilkd. 21, 17–28 (2007). https://doi.org/10.1007/s00717-007-0182-4

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  • DOI: https://doi.org/10.1007/s00717-007-0182-4

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