D. Duncan

Publications154
h-index28
Citations3,131
Highly Influential Citations87
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Laser speckle contrast imaging: theoretical and practical limitations
TLDR
This paper is a review of the technique known variously as laser speckle contrast imaging (LSCI), laser Speckle imaging (LSI), or laser specko contrast analysis. Expand
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Can laser speckle flowmetry be made a quantitative tool?
TLDR
We review the underlying theory, explore the impact of various analytic models for relating measured intensity fluctuations to scatterer motion, and address some of the practical issues associated with the measurement and subsequent data processing. Expand
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Sunlight exposure and risk of lens opacities in a population-based study: the Salisbury Eye Evaluation project.
CONTEXT Exposure to UV-B radiation in sunlight has been shown to increase the risk of cataract formation in high-risk occupational groups, but risk to the population has not been quantified. … Expand
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Racial differences in lens opacities: the Salisbury Eye Evaluation (SEE) project.
The purpose of this study was to determine racial differences in the prevalence of different types of lens opacities and cataract surgery. Between 1993 and 1995, the Salisbury Eye Evaluation (SEE)… Expand
  • 114
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OCT-based elastography for large and small deformations.
TLDR
We present two approaches to quantifying the strain response of a mechanically inhomogeneous, bi-layered polyvinyl alcohol tissue phantom that is subjected to either small or large dynamic compressive forces while being imaged with a spectral domain OCT system. Expand
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Statistics of local speckle contrast.
In describing the first-order properties of laser speckle under polarized illumination conditions, it is almost an article of faith that the contrast is unity. In many processing schemes, however,… Expand
  • 120
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Visual and cognitive deficits predict stopping or restricting driving: the Salisbury Eye Evaluation Driving Study (SEEDS).
PURPOSE To determine the visual and other factors that predict stopping or restricting driving in older drivers. METHODS A group of 1425 licensed drivers aged 67 to 87 years, who were residents of… Expand
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Detrimental effects of speckle-pixel size matching in laser speckle contrast imaging.
Through a series of simulations and experiments, we demonstrate that the frequently cited criterion of matching speckle size to detector element (pixel) size in laser speckle contrast imaging (LSCI)… Expand
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The effect of compliance on wall shear in casts of a human aortic bifurcation.
Rigid and compliant casts of a human aortic bifurcation were subjected to physiologically realistic pulsatile fluid flows. At a number of sites near the wall in the approximate median plane of the… Expand
  • 102
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Older Drivers and Failure to Stop at Red Lights
Background Despite sensational news reports, few studies have quantified the rates of poor driving performance among older drivers and the predictors of poor performance. We determined the rate of… Expand
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