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1、第36卷第10期中国激光Vol.36,No.102009年10月CHINESEJOURNALOFLASERSOctober,2009文章编号:02587025(2009)10251007CoordinateTracingModelofLightForwardScatteredbyTurbidMedia1112LiuWu(吴柳)ZheLi(李哲)JiashengWang(汪家升)XiangqunXu(徐向群)1DepartmentofPhysics,BeijingJiaotongUniversity,Beiji
2、ng100044,China2SchoolofScience,ZhejiangSciTechUniversity,Hangzhou,Zhejiang310018,ChinaReceivedApril3,2009;revisedApril13,2009Correspondingauthor:xuxiangqun@zstu.edu.cnAbstractOpticaltechniquesbasedonmeasuringscatteringpropertiesofbiotissueshaveapotentialtodetermineinte
3、rnalphysiologicalstate.Fortissueimaging,theleastscatteredphotonsarrivingatadetectormayhaveasignificanteffectonthedevelopmentofimagingalgorithms.Tracingleastscatteredphotonsmaybehelpfulforfurtherunderstandingofimagingmechanismswithincurrenthighresolutionopticalimagingt
4、echniques.Basedonthevertexpropagator,acoordinatetracingmodelisdevelopedtosearchprobabilitiesforleastscatteredphotonstraversinginascatteringmedium.Integralexpressionsforphotonexperiencinganytimescatteringeventsareobtained.Comparedwiththemethodsbasedonbothgeometricaltrac
5、ingandMonteCarlosimulation,ourmodelissimplerandeasierforprogramming.Keywordsscattering;turbidmedia;imagingalgorithm;biomedicalopticsCLCN:O242.2;TN012DocumentCode:Adoi:10.3788/CJL20093610.25101IntroductionmathematicallyalightpropagationproblemtobeUnderstandingo
6、ftheinteractionoflightwithinsolvedanalyticallyornumerically.Obviously,tissueatacellularlevelwillpromotethedevelopmentMonteCarlosimulationtechniquescanbeusedtoofopticaldiagnostictechniques.Opticaltechniquestracestochasticallythelightpropagatinginthe[11]arepotentiallycapabl
7、eofrapid,noninvasivemedium,butitistimeconsuming.assessmentoftissuepathology.Inthepastyears,aThereareafewgeneraltheoreticalapproachesnumberoftechniqueshavebeendevelopedthatrelyavailableforconsideringlightpropagationininsomemannersonmeasuringthescatteringscatteringmaterial
8、s,e.g.,lighttransport[12][12~15]propertiesoftissuetodetermineitsphysiologicaltheory,lightdiffu
