<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="6.x">Drupal-Biblio</source-app><ref-type>47</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Thompson, O.B.</style></author><author><style face="normal" font="default" size="100%">Andrews, M.K.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Spectral density and tissue perfusion from speckle contrast measurements</style></title><secondary-title><style face="normal" font="default" size="100%">Progress in Biomedical Optics and Imaging - Proceedings of SPIE</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">(p</style></keyword><keyword><style  face="normal" font="default" size="100%">Auto correlation function (ACF)</style></keyword><keyword><style  face="normal" font="default" size="100%">Blood flows</style></keyword><keyword><style  face="normal" font="default" size="100%">Camera technology</style></keyword><keyword><style  face="normal" font="default" size="100%">Characteristic time</style></keyword><keyword><style  face="normal" font="default" size="100%">Coherent light</style></keyword><keyword><style  face="normal" font="default" size="100%">Computer networks</style></keyword><keyword><style  face="normal" font="default" size="100%">contrast measurements</style></keyword><keyword><style  face="normal" font="default" size="100%">Correlation detectors</style></keyword><keyword><style  face="normal" font="default" size="100%">Diagnostic radiography</style></keyword><keyword><style  face="normal" font="default" size="100%">Doppler</style></keyword><keyword><style  face="normal" font="default" size="100%">exposure time</style></keyword><keyword><style  face="normal" font="default" size="100%">Hemodynamics</style></keyword><keyword><style  face="normal" font="default" size="100%">Imaging techniques</style></keyword><keyword><style  face="normal" font="default" size="100%">laser speckles</style></keyword><keyword><style  face="normal" font="default" size="100%">Lasers</style></keyword><keyword><style  face="normal" font="default" size="100%">Measurements</style></keyword><keyword><style  face="normal" font="default" size="100%">Medical imaging</style></keyword><keyword><style  face="normal" font="default" size="100%">Nonexponential</style></keyword><keyword><style  face="normal" font="default" size="100%">Optical engineering</style></keyword><keyword><style  face="normal" font="default" size="100%">Optical methods</style></keyword><keyword><style  face="normal" font="default" size="100%">Optical tomography</style></keyword><keyword><style  face="normal" font="default" size="100%">Optical-coherence tomography (OCT)</style></keyword><keyword><style  face="normal" font="default" size="100%">Optics</style></keyword><keyword><style  face="normal" font="default" size="100%">p</style></keyword><keyword><style  face="normal" font="default" size="100%">Pulsed laser deposition</style></keyword><keyword><style  face="normal" font="default" size="100%">Regression analysis</style></keyword><keyword><style  face="normal" font="default" size="100%">Speckle</style></keyword><keyword><style  face="normal" font="default" size="100%">Spectral informations</style></keyword><keyword><style  face="normal" font="default" size="100%">t) measurements</style></keyword><keyword><style  face="normal" font="default" size="100%">Technology</style></keyword><keyword><style  face="normal" font="default" size="100%">Technology transfer</style></keyword><keyword><style  face="normal" font="default" size="100%">Thermography (temperature measurement)</style></keyword><keyword><style  face="normal" font="default" size="100%">Tissue perfusion</style></keyword><keyword><style  face="normal" font="default" size="100%">Tomography</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2008</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://www.scopus.com/inward/record.url?eid=2-s2.0-42149090609&amp;partnerID=40&amp;md5=43d5c31a491710cb2a06effd69c23970</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">6847</style></volume><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">Progress in laser and camera technology has simplified the acquisition of laser speckle images relating to dermal blood flow. Using speckle contrast measurements over 5 decades of exposure time, we show that a temporal autocorrelation function, and hence spectral information and a perfusion index precisely equivalent to that produced in Doppler methods, can be derived from speckle measurements. The autocorrelation data are well approximated by a simple but nonexponential function which is parametric in a characteristic time τc. We suggest that the perfusion index could be found simply by determining τc from a small number of speckle measurements at appropriate exposures. This is illustrated by measurement of perfusion recovery following an induced change in perfusion.</style></abstract></record></records></xml>