Open AccessThree-dimensional quantitative imaging of retinal and choroidal blood flow velocity using joint Spectral and Time domain Optical Coherence Tomography
Author(s) -
Anna Szkulmowska,
Maciej Szkulmowski,
Daniel Szlag,
Andrzej Kowalczyk,
Maciej Wojtkowski
Publication year - 2009
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.17.010584
Subject(s) - optical coherence tomography , optics , doppler effect , image quality , blood flow , image processing , physics , time domain , coherence (philosophical gambling strategy) , tomography , computer science , computer vision , image (mathematics) , medicine , quantum mechanics , astronomy
Recently, joint Spectral and Time domain Optical Coherence Tomography (joint STdOCT) has been proposed to measure ocular blood flow velocity. Limitations of CCD technology allowed only for two-dimensional imaging at that time. In this paper we demonstrate fast three-dimensional STdOCT based on ultrahigh speed CMOS camera. Proposed method is straightforward, fully automatic and does not require any advanced image processing techniques. Three-dimensional distributions of axial velocity components of the blood in human eye vasculature are presented: in retinal and, for the first time, in choroidal layer. Different factors that affect quality of velocity images are discussed. Additionally, the quantitative measurement allows to observe a new interesting optical phenomenon - random Doppler shift in OCT signals that forms a vascular pattern at the depth of sclera.