Document Detail


Measurement of absolute blood flow velocity and blood flow in the human retina by dual-beam bidirectional Doppler fourier-domain optical coherence tomography.
MedLine Citation:
PMID:  22893675     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
PURPOSE: The present experiments were undertaken to evaluate the validity of absolute flow velocity measurements with a dual-beam bidirectional Doppler Fourier-domain optical coherence tomography (FD-OCT) system.
METHODS: The flow velocities of diluted milk through a glass capillary were measured at 30 different preset velocities in the range of 0.9 to 39.3 mm/s by bidirectional Doppler FD-OCT. The flow through the capillary was controlled by two infusion pumps working in different flow ranges and based on different technical principles. In vivo the validity of the method for measuring blood flow in retinal vessels was tested at bifurcations. The continuity equation was verified at 10 retinal venous bifurcations of 10 young healthy subjects (mean age, 29 ± 3 years) by velocity measurements, using dual-beam bidirectional Doppler FD-OCT, and measurements of retinal diameters, using the Dynamic Vessel Analyzer.
RESULTS: Flow velocities as measured with bidirectional Doppler FD-OCT in the glass capillary were in good agreement with the preset velocities (r = 0.994, P < 0.001 each). No significant difference was found between flow in the trunk vessels before the bifurcation (11.3 ± 5.2 μL/min) and the sum of flows in the daughter vessels (10.7 ± 4.8 μL/min). A significant association was found between retinal vessel diameters and both retinal blood velocities (r = 0.72, P < 0.001) and retinal blood flow (r = 0.95, P < 0.0001).
CONCLUSIONS: Dual-beam bidirectional Doppler FD-OCT delivered accurate retinal blood velocity values and, thus, offers high potential for examination of retinal blood flow in ocular disease.
Authors:
René M Werkmeister; Nikolaus Dragostinoff; Stefan Palkovits; Reinhard Told; Agnes Boltz; Rainer A Leitgeb; Martin Gröschl; Gerhard Garhöfer; Leopold Schmetterer
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Publication Detail:
Type:  Journal Article     Date:  2012-09-12
Journal Detail:
Title:  Investigative ophthalmology & visual science     Volume:  53     ISSN:  1552-5783     ISO Abbreviation:  Invest. Ophthalmol. Vis. Sci.     Publication Date:  2012  
Date Detail:
Created Date:  2012-09-13     Completed Date:  2012-11-13     Revised Date:  2013-01-09    
Medline Journal Info:
Nlm Unique ID:  7703701     Medline TA:  Invest Ophthalmol Vis Sci     Country:  United States    
Other Details:
Languages:  eng     Pagination:  6062-71     Citation Subset:  IM    
Affiliation:
Center for Medical Physics and Biomedical Engineering, Vienna, Austria.
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MeSH Terms
Descriptor/Qualifier:
Adult
Blood Flow Velocity / physiology
Fourier Analysis
Humans
Laser-Doppler Flowmetry / methods*
Retinal Vessels / physiology*
Tomography, Optical Coherence / methods*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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