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Line-field parallel swept source MHz OCT for structural and functional retinal imaging.

Daniel J Fechtig1, Branislav Grajciar2, Tilman Schmoll3

  • 1Center for Med. Physics and Biomed. Engineering, Medical University Vienna, Waehringer Guertel 18-20, A-1090, Vienna, Austria ; Christian Doppler Laboratory for Laser Development and their Application to Medicine and Biology, Center for Medical Physics and Biomedical Engineering, Medical University Vienna, Austria.

Biomedical Optics Express
|March 24, 2015
PubMed
Summary

High-speed retinal imaging is now possible using line-field parallel swept source imaging (LPSI). This technology offers competitive sensitivity and speed for visualizing retinal structure and function.

Keywords:
(110.4500) Optical coherence tomography(170.0110) Imaging systems(170.3880) Medical and biological imaging(170.4460) Ophthalmic optics and devices

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Area of Science:

  • Ophthalmology
  • Biomedical Optics
  • Medical Imaging

Background:

  • Optical Coherence Tomography (OCT) is crucial for retinal imaging.
  • Conventional OCT methods face limitations in speed and resolution.
  • Advancements are needed for high-speed, in-depth retinal visualization.

Purpose of the Study:

  • To demonstrate three-dimensional structural and functional retinal imaging using line-field parallel swept source imaging (LPSI).
  • To evaluate LPSI's performance against conventional OCT in terms of speed, sensitivity, contrast, and penetration.
  • To explore LPSI's potential for high-speed optical angiography.

Main Methods:

  • Utilized line-field parallel swept source imaging (LPSI) for retinal imaging.
  • Achieved acquisition speeds up to 1 MHz equivalent A-scan rate.
  • Employed a central wavelength of 840 nm with sensitivity exceeding 93.5 dB.

Main Results:

  • Demonstrated competitive sensitivity, speed, image contrast, and penetration depth compared to conventional OCT.
  • Achieved high-speed imaging of retinal function and morphology.
  • Showcased feasibility of high-speed optical angiography for retinal microcirculation visualization.

Conclusions:

  • LPSI enables high-speed, three-dimensional structural and functional retinal imaging.
  • The technology utilizes commercially available components, making it accessible.
  • LPSI shows significant potential for advancing retinal imaging and diagnostics.