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19 June 2024 Quantitative estimation of blood volume rate in retinal arteries by Doppler holography
Yohan Blazy, Olivier Martinache, Zofia Bratasz, Michael Atlan
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Proceedings Volume PC13009, Clinical Biophotonics III; PC1300905 (2024) https://doi.org/10.1117/12.3017575
Event: SPIE Photonics Europe, 2024, Strasbourg, France
Abstract
Doppler holography, employing high-speed digital imaging and near-infrared light, maps blood flow in the eye's fundus. It can be exploited to estimate quantitatively the velocity and volume of blood flow by assessing the Doppler frequency broadening increase in retinal arteries with respect to local surrounding tissue. This technique enhances our ability to gauge hemodynamics within these arteries across the cardiac cycle, crucial for ocular disease diagnosis and management. Infrared radiation scatters and broadens within the retina's deeper layers, aiding the analysis of blood flow in superficial retinal vessels. Light interaction with blood scatterers is quantified to estimate flow velocity, using a model of forward scattering for momentum transfer. The root-mean-square velocity reflects the degree of Doppler broadening, allowing for a detailed assessment of retinal hemodynamics. This approach provides a valuable tool for analysing ocular vascular health.
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Yohan Blazy, Olivier Martinache, Zofia Bratasz, and Michael Atlan "Quantitative estimation of blood volume rate in retinal arteries by Doppler holography", Proc. SPIE PC13009, Clinical Biophotonics III, PC1300905 (19 June 2024); https://doi.org/10.1117/12.3017575
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KEYWORDS
Doppler effect
Blood circulation
Arteries
Holography
Blood
Eye
Light scattering
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