Implementations of three OCT angiography (OCTA) methods with 1.7 MHz A-scan rate OCT system on imaging of human retinal and choroidal vasculature

Raju Poddar, John S Werner

Research output: Contribution to journalArticle

8 Scopus citations

Abstract

We present noninvasive depth-resolved imaging of human retinal and choroidal microcirculation with an ultrahigh-speed (1.7 MHz A-scans/s), Fourier-domain mode locked (FDML) swept-source optical coherence tomography (SS-OCT) system having a central wavelength of 1065 nm. Three OCT angiography (OCTA) motion based contrast methods, namely phase variance (PV), amplitude decorrelation (AD) and Joint Spectral and Time domain OCT (STdOCT) were implemented. The OCTA imaging was performed with a field of view of 16° (5 mm × 5 mm) and 30° (9 mm × 9 mm), on the retina. A qualitative comparison of images obtained with all three OCTA methods is demonstrated using the same eye of a healthy volunteer. Different parameters, namely acquisition time, scanning area, and scanning density, are discussed. The phase-variance OCTA (PV-OCTA) method produced relatively better results than the other two. Different features regarding the retinal and choroidal vessels are described in different subjects.

Original languageEnglish (US)
Pages (from-to)130-139
Number of pages10
JournalOptics and Laser Technology
Volume102
DOIs
StatePublished - Jun 1 2018

Keywords

  • Choroid
  • Doppler OCT
  • Flow imaging
  • Fourier domain mode-locked laser
  • Medical and biological imaging
  • Medical optics instrumentation
  • OCT angiography
  • Ophthalmic optics and devices
  • Ophthalmology
  • Optical coherence tomography
  • Retinal blood flow
  • Swept-source OCT

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering

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