最新图像配准综述image registrationppt课件.ppt

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1、图像配准综述imageregistrationIntroductionMedicalimagingAstepbringthemodalitiesinvolvedintospatialalignment,aprocedurereferredtoasregistration.Afusionstepisrequiredfortheintegrateddisplayofthedatainvolved.SpatialRegistrationMethodsIntrinsicRegistrationMethodsVoxelpropertybasedregistrationmethodsoperated

2、irectlyontheimagegreyvaluesAdvantage:automaticandveryfastnatureeasyimplementationScopeofapplication:asacoarsepre-registrationinvariousotherregistrationareasIntrinsicRegistrationMethodsfull-image-contentbasedvoxelpropertyregistrationmethodsCross-correlation(oforiginalimagesorextractedfeatureimages

3、)Fourierdomainbasedcross-correlation,andphase-onlycorrelationMinimizationofvarianceofintensityratios.MinimizationofvarianceofgreyvalueswithinsegmentsMinimizationofthehistogramentropyofdifferenceimagesHistogramclusteringandminimizationofhistogramdispersion…………NatureofthetransformationAnimagecoordi

4、natetransformationonlytranslationsandrotationsareallowed.Ifthetransformationmapsparallellinesontoparallellinesitiscalledaffine.Ifitmapslinesontolines,itiscalledprojective.NatureofthetransformationInterctionInteractive,wheretheuserdoestheregistrationhimself,assistedbysoftwaresupplyingavisualornume

5、ricalimpressionofthecurrenttransformation,andpossiblyaninitialtransformationguess.OptimizationprocedureThePowall'smethodtheDownhillSimplexmethodLevenberg-MarquardtoptimizationNewton-Raphsoniterationstochasticsearchmethodsgradientdescentmethodssimulatedannealinggeometrichashing2D-3DImageRegistrati

6、on=2D-3DImageRegistration=CoronaryAngiogramsForCardiacThevirtualcardiacsurgicalplanning(VCSP)Thedigitalheartmodelwascomposedof30framespercardiaccycle,400*400*400volumewith540umisotropicvoxels.CoronaryAngiogramsForCardiacConsideredregistrationbasedbothondual-plane2PangiogramsCoronaryAngiogramsForC

7、ardiac2D-3DRegistrationAbdominalCatheterInterventionsInabdominalcatheterizations(e.g.TransarterialChemoembolization(TACE),orTransjugularPortosystemicShunt(TIPS))mono-planeX-rayimagingdevicesareusedmoreoftenincontrastto