简介:Thispaperproposesapracticalalgorithmsofplanecutting,stereoclippingandarbitrarycuttingfor3Dsurfacemodelreconstructedfrommedicalimages.Inplanecuttingandstereoclippingalgorithms,the3Dmodeliscutbyplaneorpolyhedron.Listsofedgeandvertexineverycutplaneareestablished.Fromtheseliststheboundarycontoursarecreatedandtheirrelationshipofembraceisascertained.TheregionclosedbythecontoursistriangulatedusingDelaunaytriangulationalgorithm.Arbitrarycuttingoperationcreatescuttingcurveinteractively.Thecutmodelstillmaintainsitscorrecttopologystructure.Withtheseoperations,tissuesinsidecanbeobservedeasilyanditcanaiddoctorstodiagnose.Themethodscanalsobeusedinsurgeryplanningofradiotherapy.
简介:Themajortherapyforischemicstrokeisthrombolytictreatment,butsevereconsequencesoccurwhenthismethodisusedtotreathemorrhagicstroke.Currently,computedtomographyandmagneticresonanceimagingareusedtodifferentiatebetweentwotypesofstroke,butthesetwomethodsarein-effectiveforpre-hospitalcare.
简介:Furthermore,breast-feedingwithoutvitaminDsupplementationcouldprolongthedeficiency,whichmightleadtoariskofserioushealthproblemslaterinlife,includingtype1diabetesanddecreasedbonedensity.'Craniotabes,thesofteningofskullbones,inotherwisenormalnewbornshaslargelybeenregardedasaphysiologicalconditionwithouttheneedfor