Ensemble averaging laser speckle contrast imaging: statistical model of improvement as function of static scatterers
نویسندگان
چکیده
منابع مشابه
Spatial versus temporal laser speckle contrast analyses in the presence of static optical scatterers.
Previously published data demonstrate that the temporal processing algorithm for laser speckle contrast imaging (LSCI) can improve the visibility of deep blood vessels and is less susceptible to static speckle artifacts when compared with the spatial algorithm. To the best of our knowledge, the extent to which the temporal algorithm can accurately predict the speckle contrast associated with fl...
متن کاملLaser speckle contrast imaging of Raynaud phenomenon.
483 peripheral microcirculatory blood flow on a large area of the body.1 LSCI is user‐friendly and shows very good reproducibility as well as excellent spa‐ tial and temporal resolutions.2 In clinical studies, LSCI coupled with reactivity tests enable to esti‐ mate the endothelial and neurovascular function. We present the measurements of skin per‐ fusion assessed by LSCI in patients with pri‐ ...
متن کاملCorrection for spatial averaging in laser speckle contrast analysis
Practical laser speckle contrast analysis systems face a problem of spatial averaging of speckles, due to the pixel size in the cameras used. Existing practice is to use a system factor in speckle contrast analysis to account for spatial averaging. The linearity of the system factor correction has not previously been confirmed. The problem of spatial averaging is illustrated using computer simu...
متن کاملComparison of laser speckle contrast imaging with laser Doppler for assessing microvascular function.
OBJECTIVE To compare the inter-day reproducibility of post-occlusive reactive hyperaemia (PORH) and sympathetic vasomotor reflexes assessed by single-point laser Doppler flowmetry (SP-LDF), integrating-probe LDF (IP-LDF) and laser speckle contrast imaging (LSCI), and the spatial variability of PORH assessed by IP-LDF and LSCI. We also evaluated the relationship between IP-LDF and LSCI perfusion...
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In recent years, skin microcirculation has been considered an easily accessible and potentially representative vascular bed to evaluate and understand the mechanisms of microvascular function and dysfunction.1–3 Vascular dysfunction (including impaired endothelium-dependent vasodilation) induced by different pathologies is evident in the cutaneous circulation.4–7 It has been suggested that the ...
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ژورنال
عنوان ژورنال: Optics Express
سال: 2021
ISSN: 1094-4087
DOI: 10.1364/oe.428394