Atlas-Free Surface Reconstruction of the Cortical Grey-White Interface in Infants 英文参考文献.docVIP
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Atlas-Free Surface Reconstruction of the Cortical Grey-White Interface in Infants 英文参考文献
Atlas-FreeSurfaceReconstructionoftheCorticalGrey-
WhiteInterfaceinInfants
Franc?oisLeroy1,2,3,4*,Jean-Franc?oisMangin2,4,Franc?oisRousseau5,Herve′ Glasel1,2,3,4,L.Hertz-
Pannier2,4,JessicaDubois1,2,3,4,GhislaineDehaene-Lambertz1,2,3,4
1INSERM,CognitiveNeuroimagingUnit,GifsurYvette,France,2CEA,DSV,I2BM,NeurospinCenter,GifsurYvette,France,3UniversityParis11,Orsay,France,4IFR49,
Paris,France,5LSIIT,UMR7005,CNRS-Universite′ deStrasbourg,Illkirch,France
Abstract
Background: The segmentation of the cortical interface between grey and white matter in magnetic resonance images
(MRI) is highly challenging during the first post-natal year. First, the heterogeneous brain maturation creates important
intensityfluctuationsacrossregions.Second,thecorticalribbonishighlyfoldedcreatingcomplexshapes.Finally,thelow
tissuecontrastandpartialvolumeeffectshampercortexedgedetectioninpartsofthebrain.
MethodsandFindings:Wepresentanatlas-freemethodforsegmentingthegrey-whitematterinterfaceofinfantbrainsin
T2-weighted(T2w)images.Weusedabroadcharacterizationoftissueusingfeaturesbasednotonlyonlocalcontrastbut
alsoongeometricproperties.Furthermore,inaccuraciesinlocalizationwerereducedbytheconvergenceoftwoevolving
surfaceslocatedoneachsideoftheinnercorticalsurface.Ourmethodhasbeenappliedtoelevenbrainsofone-tofour-
month-oldinfants.Bothquantitativevalidationsagainstmanualsegmentationsandsulcallandmarksdemonstratedgood
performanceforinfantsyoungerthantwomonthsold.Inaccuraciesinsurfacereconstructionincreasedwithageinspecific
brainregionswherethetissuecontrastdecreasedwithmaturation,suchasinthecentralregion.
Conclusions:Wepresentedanewsegmentationmethodwhichachievedgoodtoverygoodperformanceatthegrey-white
matterinterfacedependingontheinfantage.Thismethodshouldreducemanualinterventionandcouldbeappliedto
pathologicalbrainssinceitdoesnotrequireanybrainatlas.
Citation: Leroy F, Mangin J-F, Rousseau F, Glasel H, Hertz-Pannier L, et al. (2011) Atlas-Free Surface Reconstruction of the Cortical Grey-W
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