scholarly journals Effect of Diffuse Luminance Flicker Light Stimulation on Total Retinal Blood Flow Assessed With Dual-Beam Bidirectional Doppler OCT

2017 ◽  
Vol 58 (2) ◽  
pp. 1167 ◽  
Author(s):  
Gerold C. Aschinger ◽  
Leopold Schmetterer ◽  
Klemens Fondi ◽  
Valentin Aranha Dos Santos ◽  
Gerald Seidel ◽  
...  
Keyword(s):  
Blood Flow ◽  
Retinal Blood Flow ◽  
Light Stimulation ◽  
Dual Beam ◽  
Doppler Oct ◽  
Flicker Light

scholarly journals Response of Retinal Blood Flow to Systemic Hyperoxia as Measured with Dual-Beam Bidirectional Doppler Fourier-Domain Optical Coherence Tomography

PLoS ONE ◽  
2012 ◽  
Vol 7 (9) ◽  
pp. e45876 ◽  
Author(s):  
René M. Werkmeister ◽  
Stefan Palkovits ◽  
Reinhard Told ◽  
Martin Gröschl ◽  
Rainer A. Leitgeb ◽  
...  
Keyword(s):  
Blood Flow ◽  
Optical Coherence Tomography ◽  
Retinal Blood Flow ◽  
Fourier Domain ◽  
Optical Coherence ◽  
Dual Beam

scholarly journals Blood flow velocity vector field reconstruction from dual-beam bidirectional Doppler OCT measurements in retinal veins

2015 ◽  
Vol 6 (5) ◽  
pp. 1599 ◽  
Author(s):  
Gerold C. Aschinger ◽  
Leopold Schmetterer ◽  
Veronika Doblhoff-Dier ◽  
Rainer A. Leitgeb ◽  
Gerhard Garhöfer ◽  
...  
Keyword(s):  
Blood Flow ◽  
Vector Field ◽  
Flow Velocity ◽  
Blood Flow Velocity ◽  
Velocity Vector ◽  
Velocity Vector Field ◽  
Field Reconstruction ◽  
Dual Beam ◽  
Doppler Oct

scholarly journals Retinal blood flow reduction in normal-tension glaucoma with single-hemifield damage by Doppler optical coherence tomography

2020 ◽  
Vol 105 (1) ◽  
pp. 124-130 ◽  
Author(s):  
Takafumi Yoshioka ◽  
Youngseok Song ◽  
Motofumi Kawai ◽  
Tomofumi Tani ◽  
Kengo Takahashi ◽  
...  
Keyword(s):  
Blood Flow ◽  
Optical Coherence Tomography ◽  
Temporal Artery ◽  
Normal Tension Glaucoma ◽  
Retinal Nerve Fibre Layer ◽  
Retinal Blood Flow ◽  
Optical Coherence ◽  
Spectral Domain Oct ◽  
Blood Flow Reduction ◽  
Doppler Oct

AimsTo evaluate the associations between retinal blood flow (RBF) and optical coherence tomography (OCT) structural measurements in normal-tension glaucoma (NTG) eyes with single-hemifield visual field (VF) damage by the Doppler OCT.MethodsThe Doppler OCT was used to measure temporal artery (TA) RBF and temporal vein (TV) RBF. Retinal nerve fibre layer thickness (RNFLT) was measured by spectral-domain OCT.ResultsForty-three consecutive eyes of 43 patients with NTG with VF defect confined to a single hemifield and 24 eyes of 24 age-matched healthy subjects were studied. TA and TV RBF and RNFLT were reduced in the damaged hemisphere compared with the normal hemisphere (mean (SD), 3.61 (1.68) vs 5.86 (2.59) µL/min, p<0.001; 5.61 (2.51) vs 6.94 (2.83) µL/min, p=0.010; 69.0 (19.7) vs 99.7 (22.8) µm, p<0.001). Those values in the normal hemisphere of NTG eyes also decreased compared with the healthy hemisphere of the healthy eyes (8.40 (3.36) µL/min, p<0.001; 9.28 (4.47) µL/min, p<0.002; 122.8 (20.2) µm, p<0.001). Multivariate model showed that normal and damaged hemispheres and RNFLT were associated with RBF reduction. In addition, the RBF in the normal hemisphere was lower than that in the healthy hemisphere even after adjusting for RNFLT.ConclusionIn NTG eyes with single-hemifield damage, the RBF was significantly reduced in the damaged hemisphere compared with the normal one. The RBF decreased in the normal and damaged hemispheres of NTG eyes compared with the healthy hemisphere independent from RNFLT.

Dual beam Doppler FD-OCT system with integrated Dynamic Vessel Analyzer and rotatable beams to measure total retinal blood flow

2014 ◽  
Author(s):  
Veronika Doblhoff-Dier ◽  
René M. Werkmeister ◽  
Martin Gröschl ◽  
Leopold Schmetterer
Keyword(s):  
Blood Flow ◽  
Retinal Blood Flow ◽  
Dynamic Vessel Analyzer ◽  
Dual Beam

scholarly journals Measurement of the total retinal blood flow using dual beam Fourier-domain Doppler optical coherence tomography with orthogonal detection planes

2014 ◽  
Vol 5 (2) ◽  
pp. 630 ◽  
Author(s):  
Veronika Doblhoff-Dier ◽  
Leopold Schmetterer ◽  
Walthard Vilser ◽  
Gerhard Garhöfer ◽  
Martin Gröschl ◽  
...  
Keyword(s):  
Blood Flow ◽  
Optical Coherence Tomography ◽  
Retinal Blood Flow ◽  
Fourier Domain ◽  
Optical Coherence ◽  
Dual Beam ◽  
Doppler Optical Coherence Tomography

scholarly journals Relating retinal blood flow and vessel morphology in sickle cell retinopathy

Eye ◽  
2019 ◽  
Vol 34 (5) ◽  
pp. 886-891
Author(s):  
Jennifer Cano ◽  
Shayan Farzad ◽  
Maziyar M. Khansari ◽  
Ou Tan ◽  
David Huang ◽  
...  
Keyword(s):  
Blood Flow ◽  
Sickle Cell ◽  
Vessel Density ◽  
Retinal Blood Flow ◽  
Small Vessels ◽  
Vessel Morphology ◽  
Doppler Oct ◽  
Image Analysis Algorithm ◽  
Vessel Tortuosity ◽  
Large Vessels

Abstract Purpose The purpose of the current study was to determine associations between retinal blood flow and vessel morphology metrics in sickle cell retinopathy (SCR) and healthy normal control (NC) subjects. Methods Optical coherence tomography angiography (OCTA) and Doppler OCT imaging were performed in 12 SCR (15 eyes) and 19 NC (26 eyes) subjects. Vessel tortuosity was measured using a dedicated image analysis algorithm applied to OCTA images. Vessel density and spacing between vessels were determined from OCTA images by a fractal dimension analysis method. Retinal blood flow was quantified using a phase-resolved technique applied to en face Doppler OCT images. Results There was a significant association between increased retinal blood flow and increased vessel tortuosity (P = 0.03). Furthermore, increased retinal blood flow was associated with increased vessel density (P = 0.03) and decreased spacing between small vessels (P = 0.01). There was no significant association between retinal blood flow and spacing between large vessels (P = 0.11). Vessel tortuosity and blood flow were increased, whereas spacing between small vessels was decreased in SCR compared to NC group (P ≤ 0.03). There were no significant differences in vessel density or spacing between large vessels between the SCR and NC groups (P ≥ 0.31). Conclusions Associations between retinal hemodynamics and vessel morphology were reported, providing better understanding of retinal pathophysiology and insight into potential quantitative biomarkers to evaluate SCR.

Sign in / Sign up

Export Citation Format

Share Document