Depth selective acousto-optic flow measurement
نویسندگان
چکیده
منابع مشابه
Depth selective acousto-optic flow measurement.
Optical based methods for non-invasive measurement of regional blood flow tend to incorrectly assess cerebral blood flow, due to contribution of extra-cerebral tissues to the obtained signal. We demonstrate that spectral analysis of phase-coded light signals, tagged by specific ultrasound patterns, enables differentiation of flow patterns at different depths. Validation of the model is conducte...
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Monitoring cerebral blood flow (CBF) is crucial, as inadequate perfusion, even for relatively short periods of time, may lead to brain damage or even death. Thus, significant research efforts are directed at developing reliable monitoring tools that will enable continuous, bed side, simple and cost-effective monitoring of CBF. All existing non invasive bed side monitoring methods, which are mos...
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The field of depth recovery from optic flow has recently experienced much growth, both on the theoretical and on the empirical fronts. Unfortunately, the theoretical results are not as widely known to perception workers as they might be. This article gives a simple analysis of the information for depth present in optic flow. It also reviews the psychophysical results for depth recovery from mot...
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Programmable spectral filters, such as acousto-optic programmable dispersive filters (AOPDF, Tournois (1997)) or spatial light modulators inserted in the Fourier plane of zerodispersion lines (Froehly et al., 1983; Weiner, 2000), have opened up the field of ultrafast pulse shaping and given the ability to manipulate spectral amplitude and phase of broadband ultrashort pulses. These devices have...
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The paper introduces a new laser interferometry-based method for diagnosis of random media by means of high accuracy angle measurements and describes the results of its development and testing. Theoretical calculations of the dependence of the range of the laser interferometer on laser beam parameters, device geometry, and atmospheric turbulence characteristics are reported. It is demonstrated ...
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ژورنال
عنوان ژورنال: Biomedical Optics Express
سال: 2015
ISSN: 2156-7085,2156-7085
DOI: 10.1364/boe.6.004871