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PURPOSE ToevaluatetheaccuracyandefficacyofmultiplemodalitiesofMRIneuralnavigationsystemforstereotactic localizationandguidanceinbraintumors. METHOD AND MATERIALS Using3.0TMRIscannerforthemultiplemodalitiesimage.BOLDrestingstatefMRIandDTI combinedimagingusedforreflectingthewholebrainnervefunctionandstructuretoconnectionbecausebraintumormay causeachangeofthiskindofconnectionnetworks.Calibrationandshowingthefunctionandstructurebraincontactnetworksof tumormodel,quantitativelyfindandlocatetherestructuringformationofbrainnetworkcausedbytumormechanism,verifythe connectdiversityofanddeterminetheaccuracyofthescopeoftumorinvasionaccordingtothecalculation.Preoperative stereotacticlocalizationsweredoneundertheguidanceofneuralnavigationsystemassociatedwithopticaltrackingin27 patientswithbraintumorsfromAugust2013toOctober2015.The27tumorsincludedglioma(n=15),meningioma(n=7)and arteriovenousmalformation(n=5).Tumorsdiameterrangesfrom0.5to8.5cmwithameanof5.3cm.Withthehelpofan overlayline,whichproducedbytherealtimeopticaltrackingsystem,thetumorsoutlinewasmarkedonthecalvoussurfaceas areferenceforsubsequentcraniotomydependedonthemultiplemodalitiesMRImassmargin.Thesizeofboneflapwas measuredandcomparedwiththegroupwhichdonotusingthemultiplemodalitiesnavigation.Completeablationandwithout recurrenceatthe6monthsfollowupMRIwerethestandardtoincludeinthisretrospectivestudy.T-testandF-testwereusedfor statisticanalysis. RESULTS TheproceduresofpreoperativemultiplemodalitiesMRimagestereotacticlocalizationweresuccessfullyperformedin 27/27(100%)caseswithmarkingonthesurfaceofthehead.Forthetumorsdiameter,thereisnostatisticdifferenceinthetwo groups.MultimodalMRimagefusiontechniquesandalgorithmswithpreciseregistrationweresuccessfullyusedtofindthebest matchingtechnologyandtoestablishbraintumorconnectionnetworksmodel,whichprovidethereliabletechnicalbasisforthe accuracyoftumorresection.Thesizeoftheboneflapsissmallerincasesthatunderwentthepreoperativemultiplemodalities fusingimaginglocalization. CONCLUSION Stereotacticmultiplemodalitiesfusingimaginglocalizationofintracranialtumorsusingopticaltrackingneural navigationsystemprovidesaccuratemarkontheskullsurfaceforthelaterlessinsultcraniotomy.