A robust fetal ECG detection method for abdominal recordings

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1、IOPPUBLISHINGPHYSIOLOGICALMEASUREMENTPhysiol.Meas.28(2007)373388doi:10.1088/0967-3334/28/4/004ArobustfetalECGdetectionmethodforabdominalrecordingsSuzannaMMMartens1,ChiaraRabotti1,MassimoMischi1andRobJSluijter21DepartmentofElectricalEngineering,UniversityofTechnologyEindhoven,Eindhoven,Th

2、eNetherlands2PhilipsResearchLaboratories,Eindhoven,TheNetherlandsE-mail:smm.martens@gmail.comReceived29November2006,acceptedforpublication8February2007Published7March2007Onlineatstacks.iop.org/PM/28/373AbstractInthispaper,weproposeanewmethodforFECGdetectioninabdominalrecordings.Themethod

3、consistsofasequentialanalysisapproach,inwhichtheaprioriinformationabouttheinterferencesignalsisusedforthedetectionoftheFECG.Ourmethodisevaluatedonasetof20abdominalrecordingsfrompregnantwomenwithdifferentgestationalages.Itsperformanceintermsoffetalheartrate(FHR)detectionsuccessiscomparedw

4、iththatofindependentcomponentanalysis(ICA).TheresultsshowthatoursequentialestimationmethodoutperformsICAwithaFHRdetectionrateof85%versus60%ofICA.Thesuperiorperformanceofourmethodisespeciallyevidentinrecordingswithalowsignal-to-noiseratio(SNR).ThisindicatesthatourmethodismorerobustthanICA

5、forFECGdetection.Keywords:fetalelectrocardiography,signalprocessing,electrophysiologicalmeasurements1.IntroductionMonitoringthefetalcardiacactivitycanprovideimportantinformationtoobstetriciansfortheassessmentofthefetalwell-being(vanGeijnandCopray1994).Dopplerultrasoundisnowroutinelyusedf

6、orthemeasurementofthefetalheartrate(FHR)duringpregnancyanddelivery(Lewis2003).TheFHRvariabilityisrelatedtotheautonomicnervoussystemanditisanimportantparametertoassessfetaldistress.However,theFHRistheonlyparameterobtainedbyDopplerultrasound,whileresearchhasshownthataglobalassessmentofmorp

7、hologicalandtemporalparametersofthe0967-3334/07/040373+16$30.00©2007IOPPublishingLtdPrintedintheUK373374SMMMartensetalFigure1.Nomenclatureoftheelectrocardiogram(ECG).electrocardiogram(ECG)ofthefoetusduringgestationcanprovideadditionalinformationaboutthefetalwell-being.Inf