Choroidal laser Doppler flowmeter with enhanced sensitivity based on a scattering plate

Wang, Chuan; Ding, Zhihua; Geiser, Martial; Wu, Tong; Chen, Ming‐Hui

doi:10.1117/1.3565438

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Choroidal Vasculature Mosaics1

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2011

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“…Wang et al have published measurements with laser Doppler flowmetry showing an approximate red blood cell axial velocity of 0.4~1 mm/s in the human choroidal vascular bed (apart from arteries) [43]. This is comparable to our results.…”

Section: Choroidal Vasculature Mosaicssupporting

confidence: 82%

Variable velocity range imaging of the choroid with dual-beam optical coherence angiography

Jaillon¹,

Makita²,

Yasuno³

2011

Opt. Express

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Abstract:In this study, we present dual-beam Doppler optical coherence angiography with variable beam separation. Altering beam distance, independently of the scanning protocol, provides a flexible way to select the velocity range of detectable blood flow. This system utilized a onemicrometer wavelength light source to visualize deep into the posterior eye, i.e., the choroid. Two-dimensional choroidal vasculature maps of a human subject acquired with different beam separations, and hence with several velocity ranges, are presented. Combining these maps yields a semiquantitative visualization of axial velocity of the choroidal circulation. The proposed technique may be useful for identifying choroidal abnormalities that occur in pathological conditions of the eye. choroidal vessels using ultrahigh resolution ophthalmic OCT at 1050 nm," Opt. Express 11(17), 1980-1986 (2003 4545-4552 (2008). ©2011 Optical Society of America

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Section: Choroidal Vasculature Mosaicssupporting

confidence: 82%